- Integration of an aminopyridine derived cobalt based homogenous cocatalyst with a composite photocatalyst to promote H2evolution from water
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Inexpensive cocatalysts are promising materials to improve the performance of photocatalytic systems. However, a cocatalyst can be anchored onto a photosensitizer in certain amount and further loading can hinder the visible light by blocking the active si
- Irfan, Rana Muhammad,Khan, Sayed Ali,Tahir, Mudassir Hussain,Ahmad, Tauqeer,Ali, Liaqat,Afzal, Masood,Ali, Hazrat,Abbas, Anees,Munawar, Khuram Shahzad,Zhao, Jianqing,Gao, Lijun
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- Linear trinuclear cobalt(ii) single molecule magnet
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The introduction of NaBPh4 into a methanolic solution of CoCl2·6H2O and 2-[(pyridine-2-ylimine)-methyl]phenol (Hpymp) afforded {[CoII3(pymp)4(MeOH)2][BPh4]2
- Zhang, Yuan-Zhu,Brown, Andrew J.,Meng, Yin-Shan,Sun, Hao-Ling,Gao, Song
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- Intramolecular hydrogen bonding and tautomerism in Schiff bases. Structure of N-(2-pyridil)-2-oxo-1-naphthylidenemethylamine
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N-(2-pyridil)-salicylidene (1) and N-(2-pyridil)-2-oxo-1-naphthylidene- methylamine (2) were studied by elemental analysis, IR, 1H NMR and UV- visible techniques and the structure of compound (2) was examined crystallographically. The UV-visible spectra of 2-hydroxy Schiff bases are investigated in different solvents, acidic and basic media. Compound (2) is in tautomeric equilibrium (phenol-imine, O-H···N ? keto-amine, O···H-N forms) in polar and non-polar solvents. These tautomers are not observed in polar and non-polar solvents for (1) as also supported by 1H NMR and UV- visible data. The keto-amine form of compound (2) was observed in basic solutions of DMSO, ethanol, chloroform, benzene, cyclohexane and in acidic solutions of chloroform and benzene, but not in acidic solutions of DMSO and ethanol. On the contrary, this form for compound (1) was not observed in the same solutions. The asymmetric unit of compound (2) contains two independent molecules of (C16H12N2O) which constitute a tautomeric pair. The observed differences in the related C = N (1.317(4) and 1.330(4) A?) and C-O (1.279(4) and 1.263(4) A?) bond lengths in the two crystallographically independent molecules indicate that the phenol-imine and the keto-amine forms coexist in the solid state. Intramolecular hydrogen bond lengths (O-H···N) are 2.586(4) A? and 2.518(4) A? for the two individual tautomers. It crystallizes in the monoclinic space group P21/n with a = 5.837(2), b = 17.476(2), c = 24.295(3) A?, β = 91.95(4)°, V = 2476.9(6) A?3, Z = 4 and D(x) = 1.3315 g cm-3. (C) 2000 Elsevier Science B.V.
- Nazir,Yildiz,Yilmaz,Tahir,ülkü
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- The structure and tautomeric properties of 2-(3-pyridylmethyliminomethyl)phenol
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The structure and properties of 2-(3-pyridylmethyliminomethyl)phenol have been determined by X-ray crystallography, NMr, UV, IR spectroscopy and compared with the characteristics of the Schiff bases derived from salicylaldehyde and aminopyridines.Crystal
- Cimerman, Z.,Kiralj, R.,Galic, N.
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- Spontaneous resolution of a Δ/Λ-chiral-at-metal pseudo-tetrahedral Schiff-base zinc complex to a racemic conglomerate with C-H?O organized 41- and 43-helices
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The Schiff-base ligand N-2-(pyridyl)salicylaldimine (HL) reacts with zinc(ii) acetate or nitrate to obtain the enantiomorphous chiral-at-metal compound Δ/Λ-bis[N-2-(pyridyl)salicylaldiminato-κ2N,O]zinc(ii), [Zn(L)2] (1), which crysta
- Enamullah, Mohammed,Vasylyeva, Vera,Quddus, Mohammad Abdul,Islam, Mohammad Khairul,H?fert, Simon-Patrick,Janiak, Christoph
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- Structure and magnetic properties of a tetranuclear Cu(II) complex containing the 2-(pyridine-2-yliminomethyl)-phenol ligand
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A tetranuclear Cu(II) complex [Cu4L4(H 2O)4](ClO4)4 has been synthesized using the terdentate Schiff base 2-(pyridine-2-yliminomethyl)-phenol (HL) (the condensation product of salicylaldehy
- Giri, Sanjib,Biswas, Saptarshi,Drew, Michael G.B.,Ghosh, Ashutosh,Saha, Shyamal K.
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- Synthesis, spectroscopic characterization and DNA cleavage studies of dibutyltin(IV) complexes of bidentate Schiff bases
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Reactions of di-n-butyltin(IV)dichloride with sodium salts of Schiff bases in tetrahydrofuran-benzene solution in 1:1 and 1:2 stoichiometry afforded complexes of the types [(n-Bu)2Sn(sb)Cl] and [(n-Bu) 2Sn(sb)2], respectiv
- Dubey, Raj Kumar,Singh, Avadhesh Pratap,Patil, Sangamesh A.
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- Spectroscopic, thermal and antimicrobial properties of the copper(II) complex of Schiff base derived from 2-(salicylidene) aminopyridine
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Schiff bases and their complex combinations with metallic ions represent a class of compounds with antimicrobial activity. A ligand was prepared by condensation of the salicylaldehyde with 2-aminopyridine obtaining 2-(salicylidene) aminopyridine (SB) with
- Tantaru, Gladiola,Popescu, Maria-Cristina,Bild, Veronica,Poiata, Antonia,Lisa, Gabriela,Vasile, Cornelia
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- Triorganotin(IV) derivatives of bidentate schiff bases: Synthesis and spectral studies
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Reaction of tri-n-butyl tin(IV) chloride with the sodium salt of Schiff bases [salicylidene-2-aminopyridine (sapH), salicylidene-2-amino-4-picoline (sapicH), salicylidene-2-methyl-1-aminobenzene (o-smabH), salicylidene-4-methyl- 1-aminobenzene (p-smabH),
- Dubey, Raj Kumar,Singh, Avadhesh Pratap,Dwivedi, Nalini
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- Synthesis and physicochemical characterization of some hexacoordinated tin(IV) Schiff base complexes
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A freshly distilled tin(IV) tetrachloride interacted with sodium salts of Schiff bases in 1:2 molar ratios in a mixture of tetrahydrofuron (THF)-C 6 H6 produced complexes of the type [SnCl2 (sb) 2 ], [where sb =
- Dubey, Raj Kumar,Singh, Avadhesh Pratap,Dwivedi, Nalini
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- Synthesis, structural characterization, DFT and molecular simulation study of new zinc-Schiff base complex and its application as a precursor for preparation of ZnO nanoparticle
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In this study, the metal complex [ZnL(2-aminopyridine)Br] (I) was synthesized from a metal salt with Schiff base ligand (HL). The synthesized complex (I) was elucidated by using FT-IR, UV–Vis spectroscopy, 1H NMR, and. Moreover, the crystal str
- Galini, Masumeh,Salehi, Mehdi,Kubicki, Maciej,Bayat, Mehdi,Malekshah, Rahime Eshaghi
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- Synthesis, spectroscopic characterization, DFT calculations, and antimicrobial activities of N-arylsalicylaldiminate derivatives of diorganotin(IV)
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Equimolar reaction of di-n-butyltin(IV) complexes of bidentate Schiff bases of the type [(n-Bu)2Sn(sb)Cl] with sodium salt of mono-functional bidentate ligands in THF-benzene solution afforded structurally interesting complexes of the type [(n-
- Dubey, Raj Kumar,Singh, Avadhesh Pratap,Jaiswal, Nitesh,Singh, Divya Pratap,Meenakshi,Kushwaha, Ajeet Kumar,Kumar, Manoj,Anjum, Afreen
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- Synthesis of some new anils: Part 1. Reaction of 2-hydroxy-benzaldehyde and 2-hydroxynaphthaldehyde with 2-aminopyridene and 2-aminopyrazine
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New Schiff bases derived from 2-aminopyridene and 2-aminopyrazine have been synthesized. The UV-Visible spectra of the compounds have been investigated in acetonitrile and toluene. The compounds were in tautomeric equilibrium (enol-imine O-H...N, keto-ami
- Asiri, Abdullah M.,Badahdah, Khadija O.
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- Synthesis, characterization, potential antimicrobial, antioxidant, anticancer, DNA binding, and molecular docking activities and DFT on novel Co(II), Ni(II), VO(II), Cr(III), and La(III) Schiff base complexes
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In this study, five novel complexes for Co(II), Ni(II), VO(II), Cr(III), and La(III) ions were synthesized from a tridentate NNO monobasic chelating Schiff base ligand, (Z)-2-((pyridin-2-ylimino)methyl)phenol (HL). Spectral and analytical tools were applied to elucidate the structural compositions of the new compounds. Then, geometry optimization was conducted for all the syntheses by the Gaussian 09 program via the density functional theory method to obtain optimal structures and the most essential parameters. Moreover, the biochemical behaviors of all the syntheses were explored based on the reactivity, which was tested against various cancer cell lines (HepG-2, MCF-7, and HCT-116). The complexes exhibited an interestingly antiproliferative potential against human cancer cell lines, and the cytotoxicities of the new complexes were arranged to follow the order: VOL > CrL > NiL > LaL > CoL > HL. The antioxidant behaviors of the complexes were studied using the DPPH assay, and VOL showed the maximum antioxidant activity, followed by LaL. The antibacterial activities of the HL ligand and its complexes were studied. Moreover, the binding nature of the complexes with calf thymus DNA (CT-DNA) was investigated based on the spectrophotometric absorption titration, viscosity, and gel electrophoresis methods. The binding ability of the complexes with CT-DNA was proposed to be just intercalation or replacement mode. The intrinsic binding constant Kb was calculated and arranged based on the following order: VOL (5.2 × 105) > CrL (3.6 × 105) > NiL (3.3 × 105) > LaL (3.0 × 105) > CoL (1.12 × 105) mol?1?dm?3. Docking investigations were performed using the receptors of COVID-19's main protease viral protein (PDB ID: 6LU7) and Escherichia coli (gram [–ve] bacteria [PDB ID: 1fj4]).
- Abdel-Rahman, Laila H.,Basha, Maram T.,Al-Farhan, Badriah Saad,Shehata, Mohamed R.,Abdalla, Ehab M.
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- Bioactivity of azomethines derived mechanochemically from 2-amino pyridine and studies on the effect of substituents on the reaction
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Azomethines with pyridine framework serve as excellent pharmacophore. A number of azomethine derivatives were synthesised from 2-aminopyridine and differently substituted aromatic aldehydes in excellent to almost quantitative yields through green, mechanochemical protocol. Influence of the substituents in the nuclei of aromatic aldehydes on the rate of the reaction was investigated. Presence of ortho hydroxy groups in the nucleus of aromatic aldehydes led to the completion of the reactions in almost no time with nearly quantitative yields. 2,2'-diphenyl-1-picrylhydrazyl (DPPH) radical was used to evaluate the in vitro antioxidant activity of the prepared azomethines and the results were compared with standard natural antioxidant L-ascorbic acid. Most of the derivatives showed fairly strong antioxidant property. Antibacterial activity of the prepared azomethines were examined against Bacillus subtilis (Gram-positive) and Escherichia coli (Gram-negative) strains by using agar well diffusion method. Some of the azomethines exhibited encouraging antibacterial activities.
- Sarma, Madhushree Das,Ghosh, Subhojit
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p. 1295 - 1303
(2020/12/04)
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- Luminescent coatings: White-color luminescence from a simple and single chromophore with high anticorrosion efficiency
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Luminescent coatings have potential commercial applications. Here, the photoluminescence, thermal, and corrosion inhibition properties of reported Schiff bases have been studied. Moreover, quantum chemical calculations have been done to realize the working mechanism of their properties. Interestingly, we succeeded to get a single-chromophore white-color emission from a small Schiff base molecule through a simple technique, where the relative emission intensities at the long and short wavelengths of the visible range were controlled by introducing electron-donating or withdrawing groups. Furthermore, the compounds were found thermally stable and can emit efficiently until 124 °C. Also, the electrochemical impedance spectroscopy, electrochemical frequency modulation, Tafel polarization, and surface characterizations have been investigated. The studied compounds showed high inhibition efficiencies (ex. 93%) and played a great role in retarding the stainless-steel corrosion in 2 M H2SO4. These measurements confirmed that the existence of these Schiff bases can reduce the double-layer capacities, corrosion current densities, and corrosion rate simultaneously with increasing the charge transfer resistance values. The studied materials as luminescent coatings may be employed for mixed-type inhibitors and can provide a strategy for the development of new organic materials capable of producing white-color emission from a simple and single molecule.
- Younis, Osama,El-Katori, Emad E.,Hassanien, Reda,Abousalem, Ashraf S.,Tsutsumi, Osamu
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- A study of the component formats effect on ionization constants for a number schiff pyridine water and ethanol with variant temperature degrees
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This investigation This investigation was started by the synthesis of four pyridine Schiff bases from the mother compound (Salicyladehyed), whose nomenclatures and structures are seen in the text. The structures of these imines were well confirmed from U.
- Altaiea, Fedaa Hasan Merie
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p. 4975 - 4985
(2020/12/25)
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- Catalytic comparison of various polar Zn(II)-Schiff base complexes and VO(II)-Schiff base complexes in (ep)oxidation processes of 1,2-cyclohexene and cyclohexane
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The reactivity of Zn2+ and VO2+ ions towards pyridinyl Schiff bases, in the absence or presence of a p-sodium sulfonate group (HPSNa and HPS, respectively), provided polar and less polar catalyst complexes, which were characterized b
- Adam, Mohamed Shaker S.,Al-Omair, Mohammed A.,Ullah, Farman
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p. 4653 - 4675
(2019/06/13)
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- Synthesis of bimetallic 4-PySI-Pd@Cu(BDC) via open metal site Cu-MOF: Effect of metal and support of Pd@Cu-MOFs in H2 generation from formic acid
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Catalysts based on palladium ions grafted on Schiff-base decorated OMS-Cu(BDC) pore cage were prepared and their catalytic performance in the hydrogen generation from formic acid was studied. The effects of the porous MOF structure and Schiff-based group
- Alamgholiloo, Hassan,Zhang, Shengbo,Ahadi, Arefeh,Rostamnia, Sadegh,Banaei, Reza,Li, Zhongcheng,Liu, Xiao,Shokouhimehr, Mohammadreza
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- Synthesis, characterization and biological study of Cu(II) complexes of aminopyridine and (aminomethyl)pyridine Schiff bases
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The synthesis, characterization and antimicrobial activity determination of some aminopyridine- and (aminomethyl)pyridine–salicylaldimine copper(II) complexes were realized. The ligands, L1–L6, were prepared by condensing salicylalde
- Sobola, Abdullahi O.,Watkins, Gareth M.,Van Brecht, Bernadus
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p. 809 - 819
(2018/08/21)
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- Stepwise post-modification immobilization of palladium Schiff-base complex on to the OMS-Cu (BDC) metal–organic framework for Mizoroki-Heck cross-coupling reaction
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Palladium ions were successfully immobilized within the pores of open metal site (OMS) metal organic frameworks (MOFs) with Schiff-base (2-Py-SI) grafted in OMS-Cu (BDC) using the hydrothermal method. This Schiff-base complex on the Cu (BDC) greatly increased catalytic activity and acted as an efficient stabilizer of Pd ions. The hydrothermal method was a more efficient method for generating small metal ions in the MOF structures. The results revealed that the PdII@Cu (BDC)/2-Py-SI is a promising catalyst for the Mizoroki-Heck coupling reaction. The proposed catalyst has better recyclability and can be reused several times without apparent loss of activity.
- Alamgholiloo, Hassan,Rostamnia, Sadegh,Hassankhani, Asadollah,Khalafy, Jabbar,Baradarani, Mehdi M.,Mahmoudi, Ghodrat,Liu, Xiao
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- In vitro anticancer activity of binuclear Ru(II) complexes with Schiff bases derived from 5-substituted salicylaldehyde and 2-aminopyridine with notably low IC50 values
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The binuclear Ru(II) complexes with Schiff bases derived from 5-chlorosalicyladehyde and 2-aminopyridine and its 5-substituted salicylideneimine homologues were tested in vitro against cervical carcinoma (HeLa), metastatic colorectal adenocarcinoma (SW620
- Kahrovi?, Emira,Zahirovi?, Adnan,Kraljevi? Paveli?, Sandra,Turku?i?, Emir,Harej, Anja
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p. 1683 - 1697
(2017/05/15)
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- Half-Sandwich Ruthenium Complexes with Schiff-Base Ligands: Syntheses, Characterization, and Catalytic Activities for the Reduction of Nitroarenes
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A series of ruthenium(II) p-cymene complexes containing Schiff-base ligands [Ru(p-cymene)LCl] [HL = pyridyl-salicylimine (2a-2d); HL = thiazol-salicylimine (2e-2h); HL = benzothiazol-salicylimine (2i-2l)] have been synthesized and characterized. All Schiff-base ligands and half-sandwich ruthenium complexes were fully characterized by 1H and 13C NMR spectra, mass spectrometry, and infrared spectrometry. The molecular structures of ruthenium complexes 2b and 2k were further confirmed by single-crystal X-ray diffraction methods. Furthermore, these half-sandwich ruthenium complexes are active catalysts for the mild hydrogenation of nitroarenes to aromatic anilines in the presence of sodium tetrahydroborate reducing agent in water. The most efficient catalyst, 2b, was found be compatible with nitroarenes of various functional groups.
- Jia, Wei-Guo,Zhang, Hui,Zhang, Tai,Xie, Dong,Ling, Shuo,Sheng, En-Hong
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p. 503 - 512
(2016/03/01)
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- Synthesis and inhibitive performance of novel cationic and gemini surfactants on carbon steel corrosion in 0.5 M H2SO4 solution
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Novel cationic and gemini surfactants were synthesized and characterized. The corrosion inhibition efficiency of the synthesized surfactants was studied, on carbon steel in 0.5 M H2SO4, by weight loss, potentiodynamic polarization an
- Hegazy,El-Tabei,Bedair,Sadeq
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p. 64633 - 64650
(2015/08/18)
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- Syntheses and evaluation of drug-like properties of CO-releasing molecules containing ruthenium and group 6 metal
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In this paper, drug-like properties of two series of carbonyl metal CO-releasing molecules, Ru(CO)3ClnL (n = 1, L = amino acid or its derivatives 1-7, L = acetylacetone 8 or 2,2′-bipyridyl 9; n = 2, L = aminopyridine derivatives 10-13; n = 0, L = salicylaldehyde Schiff base 14-15) and M(CO)5L(M = Cr, Mo, W; L = glycine methyl ester 16-18; L = N-methyl imidazole 19-21), were preliminarily evaluated from four aspects involving in cytotoxicity, in vivo toxicity, bio-distribution and metabolism. Cytotoxic effects of all complexes were assayed by MTT. IC50 values of complexes 1-15 were 39.55-240.16 mg/l, and those of complexes 16 and 18 were 21.36-22.21 mg/l. Toxicity tests of mice used oral acute toxic class method and got LD50 values of some complexes; among them, LD50 of complex 1 was in 800-1000 mg/kg, complex 7 in 1100-1500 mg/kg and complex 18 in 75-125 mg/kg. After several consecutive administrations, tested complexes severely damaged liver and kidney in both functional and morphological aspects. And by metal ions measurements using ICP-AES, we found that the tested complexes were unevenly distributed in tissues and organs. In vivo, RuII in complexes was oxidized to RuIII by P450 enzymes, and for Mo 0 and W0 in complexes, part of them transformed into higher oxidation state, the others kept original state.
- Wang, Pengpeng,Liu, Huapeng,Zhao, Quanyi,Chen, Yonglin,Liu, Bin,Zhang, Baoping,Zheng, Qian
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p. 199 - 215
(2014/02/14)
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- Synthesis, characterization and solvent effects on the electronic absorption spectra of aminopyridine schiff bases
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Six Schiff bases, namely, N-(2-hydroxylbenzylidene)pyridine-4-amine (IA), N-(2-hydroxylbenzylidene)pyridine-2-amine (IB), N-(5- nitro-2- hydroxylbenzylidene)pyridin-4-amine (IIA), N-(5-nitro-2-hydroxylbenzylidene) pyridin-2-amine (IIB), N-(5-bromo-2- hydr
- Dueke-Eze, Cordelia U.,Fasina, Tolulope M.,Mphahlele, Malose J.
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p. 8505 - 8508
(2013/11/06)
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- A quick route for the synthesis of 3-Aryl-3,4-dihydro-2H-benz[e]-1,3- oxazin-2-ones
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N-(2-Hydroxy)-benzyl-arylamines (1) gave substantially pure 3-aryl-3,4-dihydro-2H-benz[e]-1,3-oxazin-2-one 2 on cyclization with carbonyldiimidazole in DMSO in 20-30 min at 20-25 °C in excellent yields.
- Shukla, Davender Kumar,Rani, Manju,Khan, Arif Ali
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p. 4537 - 4540
(2013/06/27)
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- Synthesis and structural {IR, 1H NMR, FAB-MS, XRD and magnetic} studies of some lanthanide complexes with salicylidene-2-aminopyridine
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Lanthanide complexes of the type [(Cl)2Ln(L)(H2O)4] (1-3) and [(Cl)Ln(L)2(H2O)3] (4-6) [where Ln = GdIII, SmIII and YIII, L = Schiff base ligand; salicylidene-2-aminopyridine (sapH)] were synthesized and characterized by various physico-chemical technique
- Dubey,Mariya, Ayesha
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- Ultrasonics promoted synthesis of thiazolidinones from 2-aminopyridine and 2-picolilamine
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The efficient multicomponent synthesis of thiazolidinones from the reaction of arenealdehydes, mercaptoacetic acid and 2-picolilamine or 2-aminopyridine under ultrasound irradiation are reported. The reaction with 2-aminopyridine needs a Lewis acid cataly
- Gouvêa, Daniela P.,Bare?o, Valéria D.O.,Bosenbecker, Juliano,Drawanz, Bruna B.,Neuenfeldt, Patrícia D.,Siqueira, Geonir M.,Cunico, Wilson
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experimental part
p. 1127 - 1131
(2012/08/08)
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- The substituent effects on the 13C chemical shifts of the azomethine carbon atom of N-(substituted phenyl)salicylaldimines
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Hammett correlations between the 13C-NMR chemical shifts of the azomethine carbon atom and the corresponding substituent constants were established for thirteen Schiff bases. The successful correlation of the chemical shifts with the electrophilic substituent constants σ+ indicate a significant resonance interaction of the substituents on the aniline ring with the azomethine carbon atom in the examined series of imines. The demand for electrons in the investigated compounds was compared to that of the N-benzylideneanilines and N-(substituted phenyl)pyridinealdimines. The manner of transmission of the substituent effects is discussed and they were separated into resonance and inductive effects. The inductive effects prevail over the resonance effects.
- Drmanic, Sasa Z.,Marinkovic, Aleksandar D.,Nikolic, Jasmina B.,Jovanovic, Bratislav Z.
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p. 993 - 1001
(2012/10/29)
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- Synthesis and spectral studies of some new dimeric [(μ-Cl) 2M2(L)2 · xTHF] [M = Zn(II) and Hg(II)] complexes containing Schiff-base ligands
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A series of binuclear Schiff-base complexes of zinc(II) and mercury(II) containing bidentate ligands (HL) [HL = salicylidene-2-methyl-1-aminobenzene (HL1), salicylidene-2-aminopyridine (HL2), and salicylidene-3-nitro-1-aminobenzene (
- Dubey,Baranwal,Dwivedi,Tripathi
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experimental part
p. 2649 - 2657
(2011/12/02)
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- Synthesis, spectroscopic (IR, electronic, FAB-mass, and PXRD), magnetic, and antimicrobial studies of new iron(III) complexes containing Schiff bases and substituted benzoxazole ligands
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Mixed ligand complexes of iron(III), [Fe(sb)2(py)Cl] 2H 2O (1-9) [where sbH = Schiff bases (derived from condensation of 2-aminopyridine (sapH), 2-aminophenol (saphH), o-toluidine (o-smabH), aminobenzene (sabH), p-toluidine (p-smabH), 3-nitroaniline (snabH), and anthranilic acid (saaH) with salicylaldehyde and substituted (mercapto-)benzimidazole (mbzH), {2-(o-hydroxyphenyl)}benzoxazole, (pboxH)], have been synthesized by the interactions of iron(III) chloride with corresponding ligands in 1 : 2 molar ratio in refluxing pyridine. These complexes have been characterized by elemental analyses, melting points, spectral, and magnetic studies. Powder X-ray diffraction studies of some representative complexes are also reported herein. The antibacterial and antifungal activities of the free ligands and their iron(III) complexes were found invitro. The complexes showed good antibacterial and antifungal effect to some bacteria and fungi. Two standard antibiotics (chloromphenicol and terbinafine) were used for comparison with these complexes.
- Dubey, Raj K.,Dubey, Uma K.,Mishra, Sharad K.
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experimental part
p. 2292 - 2301
(2012/07/13)
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- Synthesis and characterization of lanthanum(III) and neodymium(III) complexes containing various Schiff bases
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Some new complexes of lanthanum(III) and neodymium(III) with different Schiff bases (derived from salicylaldehyde with 2-methyl-1-aminobenzene and 2-aminopyridine have been synthesized and characterized by elemental (La/Nd, C, H, N and Cl) analysis, magne
- Dubey,Mishra,Mariya, Ayesha,Kumari, Neelam
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experimental part
p. 1047 - 1052
(2011/06/19)
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- Synthesis and physicochemical characterization of some Schiff base complexes of chromium(III)
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Some chromium(III) complexes of the type, [Cr(L)2(H 2O)2]Cl (1-10) [where L = Schiff bases (sbH, derived from the condensation of 2-amino pyridine, 2-aminophenol, o-toluidine, p-toluidine, 3-nitroaniline and anthranilic acid with salicylaldehyde/vanillin) and substituted benzimidazole/ benzoxazole or mercaptobenzimidazole] have been prepared by the reaction of chromium(III) chloride with corresponding ligands followed by immediate addition of ethanolic solution of anhydrous sodium acetate in 1:2 molar ratio. The resulting products have been characterized by elemental analysis, spectral (IR, UV-visible and FAB-mass) as well as magnetic susceptibility measurements. Octahedral structure is proposed for the complexes.
- Dubey,Dubey,Mishra
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experimental part
p. 1208 - 1212
(2009/03/11)
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- Synthesis, reactivity and physico-chemical properties of novel chloro complex of nickel(II) containing benzoxazole ligand
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New chloro complex of nickel(II) of the type [(μ-Cl)2Ni 2{η2-(pbox)}2] (1) has been synthesized by the interaction of nickel(II) chloride with {2-(o-hydroxyphenyl)}-benzoxazole (pboxH) in equimolar ratio (in refluxing EtOH). Further, it was treated with sodium salts of Schiff bases (sb) [sb = smabH and sapH], isopropoxide and aluminiumtetraisopropoxide and aryloxo- and alkoxo-salts in the presence of THF/pyridine to produce new hydrocarbon soluble mixed ligand complexes of the types : [(smab)Ni{η2-(pbox)}] (2), [(sap)Ni{η2- (pbox)}] (3), [(μ-OPri)2Ni2{η 2-(pbox)}2] (4), [(μ-OAr)2Ni 2{η2-(pbox)}2] (5) and [{μ-OPr i)2Al(OPri)2}Ni{η2- (pbox)}] (6). These new products have been characterized by spectroscopic [IR, electronic (UV-visible), FAB-mass] and magnetic studies. A tentative T d geometry around nickel(II) are proposed.
- Dubey, Raj Kumar,Mishra, Chandrakant M.,Baranwal, Pragya
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p. 387 - 394
(2009/07/18)
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- Synthesis, spectroscopic (IR, electronic and FAB-mass) and magnetic studies of some mixed ligand complexes of chromium (III)
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Some new mixed ligand complexes of chromium (III) of the type [Cr(L) 2(L1)Cl].2H2O [where LH = Schiff bases (derived from the condensation of 2-aminopyridine, 2-aminophenol, o-toludine, p-toludine, aniline, 3-nitroaniline and anthranilic acid with salicylaldehyde/vanillin and substituted benzimidazole/benzoxazole, or mercaptobenzimidazole; L=pyridine] have been synthesized by the interactions of chromium (III) chloride with corresponding ligand in 1:2 molar ratio in refluxing pyridine solution. The resulting products have been characterized by elemental analysis and spectral as well as magnetic susceptibility measurements. Structures of the chromium (III) complexes are also proposed.
- Dubey,Dubey,Mishra
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p. 1638 - 1642
(2007/10/03)
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- Synthesis, reactions, spectral and magnetic studies of chloro-{2-(o- hydroxyphenyl)-benzimidazolato}-cobalt (II)
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A new and novel (chloro) complex of cobalt (II), [(μ-Cl) 2Co2(η2-(pbz)}2], (1) where pbz={2-(o-hydroxyphenyl)} benzimidazole, η2 = number of connectivity sites involved in bounding the metal, has been
- Dubey,Mishra
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p. 2203 - 2208
(2007/10/03)
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- Thermal, magnetic, ESR and antibacterial study of some Schiff base metal complexes
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Complexes of Co(11), N(11) and Cu(11) with the Schiff bases formed by condensation of 2-aminopyridine with 2-furfuraldehyde, ethyl methyl ketone and salicylaldehyde of the general formulae (ML2).Cl2.2H2O, (ML2).
- Khare, Mahima,Mishra
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p. 256 - 258
(2007/10/03)
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- PHOTOACTIVITY WITHIN CYCLODEXTRIN CAVITIES: INCLUSION COMPLEXES OF ANILS WITH CYCLODEXTRINS
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Complexation of the thermochromic compounds N-5-chloro-salicylideneaniline and N-salicylidene-2-aminopyridine with cyclodextrins results in disappearance of thermochromic properties and appearance of photochromism.From uv, visible and fluorescence spectra
- Pistolis, G.,Hadjoudis, E.,Mavridis, I. M.
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p. 215 - 220
(2007/10/02)
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- Esters and Lactones of Phenolic Amino Carboxylic Acids: Prodrugs for Iron Chelation
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The new iron chelator N,N'-bis(2-hydroxyphenyl)ethylenediamine-N,N'-diacetic acid (1), its dilactone 2, N,N'-bis(2-hydroxybenzyl)-2-hydroxypropylene-1,3-diamine-N,N'-diacetic acid (3), and its methyl ester lactone 4 and a series of esters of N,N'-bis(2-hy
- Pitt, C. G.,Bao, Y.,Thompson, J.,Wani, M. C.,Rosenkrantz, H.,Metterville, J.
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p. 1231 - 1237
(2007/10/02)
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- ENVIRONMENTAL EFFECTS ON MOLECULAR PROPERTIES OF ORGANIC COMPOUNDS. PART I. THE FORMATION OF INCLUSION COMPOUNDS OF β-CYCLODEXTRIN WITH SALICYLIDENEANILINE AND SALICYLIDENE-2-AMINOPYRIDINE
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β-Cyclodextrin forms inclusion compounds with salicylideneaniline and salicylideneaminopyridine.The formation of the inclusion compounds has been established by i.r. measurements, differential scanning calorimetry and X-rays powder-diffraction.Environment
- Hadjoudis, E.,Moustakali-Mavridis, I.,Tsoukaris, G.,Villain, F.
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p. 255 - 264
(2007/10/02)
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- Studies on Dioxouranium(VI) Complexes with some Schiff Bases
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Uranyl complexes of some Schiff bases obtained by condensing salicylaldehyde with 2-aminopyridine, aniline and nitroanilines and 5-methylsalicylaldehyde with 2-aminopyridine are synthesized and characterised by elemental analysis, spectral and conductance data and magnetic susceptibility study.All the complexes are orange-red in colour, microcrystalline in nature and from compounds of the type (NO3)2 and , where LH and L are Schiff base molecules, L representing the ligand containing pyridyl nitrogen in the structure.The bonding with the metal in the complexes takes place from oxygen and hydroxyl oxygen in the two types of ligands and the imine nitrogen of the ligands.Pyridyl nitrogen does not take part in coordination.The studies show that the complexes formed are 1:2 adducts and that the complexes have coordination number eight and six, respectively.
- Prabhu, P. S.,Dodwad, S. S.
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p. 475 - 478
(2007/10/02)
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- Hydrolysis of Imines. Part 2. Kinetics and Mechanism of Hydrolysis of N-Salicylidene-2-aminopyridine in the Presence and Absence of Copper(II) Ion. A Study of the Catalytic Effect of some Mixed-ligand Complexes of Copper(II)
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The kinetics of hydrolysis of N-salicylidene-2-aminopyridine (HL) have been investigated in aqueous 5percent MeOH (I = 0.1 moldm-3) in the presence and absence of CuII.The Schiff-base anion is found to undergo hydroxide-independent h
- Dash, Anadi C.,Dash, Bhaskar,Mahapatra, Prasanna Kumar,Patra, Moheshwar
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p. 1503 - 1510
(2007/10/02)
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- Electroreduction of Some Azomethine Compounds at Copper and Copper Amalgam Cathodes
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The electrochemical reducibility of some azomethine compounds derived from aniline, its derivatives, 2-aminopyridine, and 2-aminobenzothiazole and aromatic aldehydes at copper and copper amalgam cathodes in acid medium has been investigated.It is found that reducibility of the compounds increases with increase in hydrogen overvoltage of the cathode and decrease in current density.Furthermore the reducibility of the azomethine compounds possessing non-hetero aromatic amine moiety is higher than that of compounds possessing heteroaromatic amine moiety.
- Awad, A.,El-Cheikh, F.,Mourad, R.
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p. 176 - 178
(2007/10/02)
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