Cobalt(II) Complex
1511
ꢀ
C7DN3 and C21DN6 bond lengths of 1.287(3) A and 1.277
4. Kondo, M.; Nabari, K.; Horiba, T.; Irie, Y.; Kabir, Md. K.;
Sarker, R. P.; Shimizu, E.; Shimizu, Y.; Fuwa, Y. Synthesis and
crystal structure of [Ni(2,5-dihydroxysalicylidene)ethylenediami-
nato]: a hydrogen bonded assembly of Ni(II)-salen complex. Inorg.
Chem. Comm. 2003, 6, 154–156.
C
(
3) in HLH confirm them as double bonds and the molecule
displays trans configuration with respect to the CDN double
bonds. In the crystal structure of 1, cations and anions are
linked through N–H¢¢¢O and O–H¢¢¢N intermolecular hydro-
gen bonds which form an infinite one dimensional network,
parallel to [010] chain (Figure 2).
5
. Keypour, H.; Salehzadeh, S.; Parish, R. V. Synthesis of two poten-
tially heptadentate (N4O3) Schiff-base ligands derived from con-
densation of tris(3-aminopropyl)amine and salicylaldehyde or 4-
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former ligand. Molecules. 2002, 7, 140–144.
6
7
. Abd El Halima, H. F.; Omar, M. M.; Mohamed, G. G.; Abou El
Ela Sayed, M. Spectroscopic and biological activity studies on tri-
dentate Schiff base ligands and their transition metal complexes.
Euro. J. Chem. 2011, 2, 178–188.
. Yang, L.; Crans, D. C.; Miller, S. M.; la Cour, A.; Anderson, O. P.;
Kaszynski, P. M.; Godzala, M. E.; Austin, L. D.; Willsky, G. R.
Cobalt(II) and cobalt(III) dipicolinate complexes: solid state, solu-
tion, and in vivo insulin-like properties. Inorg. Chem. 2002, 41,
4859–4871.
Crystal Structure of [Co(HL) ](NO ) .3H O
2
3 2
2
Figure 3 gives a view of the cobalt complex with atom labels.
The cobalt(II) is coordinated by two Schiff base ligands via
the phenolic oxygen atom and azomethine and pyridine
nitrogen atoms. Due to deprotonation of the phenolic group
and protonation of the heterocyclic nitrogen atom of pyridine
rings, each ligand behaves as a neutral tridentate ligand. The
charge is balanced by two nitrate ions. The geometry around
8
9
. Gungor, E.; Celen, S.; Azazb, D.; Kara, H. Two tridentate Schiff
base ligands and their mononuclear cobalt (III) complexes: synthe-
sis, characterization, antibacterial and antifungal activities. Spectro-
chim. Acta, Part A. 2012, 94, 216–221.
. Zhu, H.; Li, W.-H. Syntheses, crystal structures and antibacterial
activities of azido-bridged cobalt(III) complexes with Schiff bases.
Transition Met. Chem. 2010, 35, 745–749.
II
the Co ion can be described as a distorted octahedron. The
bond distances Co–N and Co–O in 1 are in accordance with
[8]
the values from the literature.
The bond angles around Co(II) ion are in the range of
ꢀ
1
(
77.62(11)–172.81(12) trans pairs of donor atoms and 83.24
ꢀ
ꢀ
13)–95.46(13) for the cis pairs (Table 2). These values indi- 10. Titi ꢁs , J.; Hud ꢀa k, J.; Ko ꢁz í ꢁs ek, J.; Kruto ꢁs ikov ꢀa , A.; Moncol, J.;
Tarabov ꢀa , D.; Bo ꢁc a, R. Structural, spectral and magnetic properties
cate a large distortion from the ideal octahedral geometry
due to the binding of Schiff base ligands in the O,N,N’-triden-
of carboxylato cobalt(II) complexes with heterocyclic N-donor
ligands: reconstruction of magnetic parameters from electronic
spectra. Inorg. Chim. Acta. 2012, 388, 106–113.
tate fashion. The average bond lengths are Co–O D 1.901
phe
ꢀ
ꢀ
ꢀ
A and 1.876A, Co–N D 1.927(5) A, which lie well within the
1
1. Fouda, A. S.; Gouda, M. M.; Abd El-Rahman, S. I. 2-Hydroxyace-
tophenone-aroyl hydrazone derivatives as corrosion inhibitors for
copper dissolution in nitric acid solution. Bull. Korean Chem. Soc.
2000, 21, 1085–1089.
2. Tai, X.-S.; Yin, X.-H.; Tan, M.-Y.; Li, Y.-Z. 3-Indolylformalde-
hyde isonicotinoylhydrazone methanol solvate Acta Crystallogr.
range of reported values for corresponding bond lengths and
[
9,10]
angles of other mononuclear cobalt (III) complexes.
In
the solid state, cations, anions, and water molecules are
linked through the hydrogen bonds forming a network, as
shown in Figure 4.
1
1
2
003, E59, o681–o682.
3. Yang, D-S. Syntheses, characterization and crystal structures of two
structurally similar Schiff bases isonicotinic acid [1-(3-methoxy-2-
hydroxyphenyl)methylidene]hydrazide and isonicotinic acid [1-(4-
dimethylaminophenyl) methylidene]hydrazide monohydrate. J.
Chem. Crystallogr. 2007, 37, 343–348.
Funding
This research was supported by the Islamic Azad University,
Yazd Branch, Iran, and the project Praemium Academiae of
the Academy of Sciences.
1
1
1
4. Tabatabaee, M.; Ghassemzadeh, M.; Zarabi, B.; Neum u€ ller, B.
Synthesis and crystal structure of Schiff bases based on AMTTO
(AMTTO
D
4-amino-6-methyl-3-thio-3,4-dihydro-1,2,4-triazin-5
(2H)-one). Z. Naturforsch. 2006, B61, 1421–1425.
5. Ghassemzadeh, M.; Tabatabaee, M.; Soleimani, S.; Neum u€ ller, B.
Synthesis, characterization and crystal structures of new 1,2,4-tria-
zole based Schiff-bases and their copper(I) complexes. Anorg. Allg.
Chem. 2005, 631, 1871–1876.
6. Tabatabaee, M.; Ghassemzadeh, M.; Sadeghi, A.; Shahriary, M.;
Neum u€ ller, B. Synthesis, characterization and X-ray structures of
AMTT-type Schiff bases and two CuI complexes (AMTT_ 4-
amino-5-methyl-2H-1,2,4-triazole-3(4H)-thione). Z. Anorg. Allg.
Chem. 2009, 635, 120–124.
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