- Establishing the coordination chemistry of antimony(v) Cations: Systematic assessment of Ph4Sb(OTf) and Ph3Sb(OTf)2 as Lewis acceptors
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The coordination chemistry of the stiboranes Ph4Sb(OTf) (1 a, OTf = OSO2CF3) and Ph3Sb(OTf)2 (3) with Lewis bases has been investigated. The significant steric encumbrance of the Sb center in 1 a precludes interaction with most ligands, but the relatively low steric demands of 4-methylpyridine-N-oxide (OPyrMe) and OPMe3 enabled the characterization of [Ph4Sb(OPyrMe)][OTf] (2 a) and [Ph4Sb(OPMe3)][OTf] (2 b), rare examples of structurally characterized complexes of stibonium acceptors. In contrast, 3 was found to engage a variety of Lewis bases, forming stable isolable complexes of the form [Ph3Sb(donor)2][OTf]2 [donor=OPMe3 (6 a), OPCy3 (6 b, Cy=cyclohexyl), OPPh3 (6 c), OPyrMe (6 d)], [Ph3Sb(dmap)2(OTf)][OTf] (6 e, dmap=4-(dimethylamino)pyridine) and [Ph3Sb(donor)(OTf)][OTf] [donor=1,10-phenanthroline (7 a) or 2,2′-bipy (7 b, bipy=bipyridine)]. These compounds exhibit significant structural diversity in the solid-state, and undergo ligand exchange reactions in line with their assignment as coordination complexes. Compound 3 did not form stable complexes with phosphine donors, with reactions instead leading to redox processes yielding SbPh3 and products of phosphine oxidation.
- Robertson, Alasdair P. M.,Chitnis, Saurabh S.,Jenkins, Hilary A.,McDonald, Robert,Ferguson, Michael J.,Burford, Neil
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p. 7902 - 7913
(2015/05/20)
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- Structural, spectroscopic and computational examination of the dative interaction in constrained phosphine-stibines and phosphine-stiboranes
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Abstract A series of phosphine-stibine and phosphine-stiborane peri-substituted acenaphthenes containing all permutations of pentavalent groups -SbClnPh4-n (5-9), as well as trivalent groups -SbCl2, -Sb(R)Cl, and -SbPh2 (2-4, R=Ph, Mes), were synthesised and fully characterised by single crystal diffraction and multinuclear NMR spectroscopy. In addition, the bonding in these species was studied by DFT computational methods. The P-Sb dative interactions in both series range from strongly bonding to non-bonding as the Lewis acidity of the Sb acceptor is decreased. In the pentavalent antimony series, a significant change in the P-Sb distance is observed between -SbClPh3 and -SbCl2Ph2 derivatives 6 and 7, respectively, consistent with a change from a bonding to a non-bonding interaction in response to relatively small modification in Lewis acidity of the acceptor. In the SbIII series, two geometric forms are observed. The P-Sb bond length in the SbCl2 derivative 2 is as expected for a normal (rather than a dative) bond. Rather unexpectedly, the phosphine-stiborane complexes 5-9 represent the first examples of the σ4P→σ6Sb structural motif. A complex situation: The strength of a dative phosphine-stiborane (P-Sb) interaction increases with stepwise replacement of phenyl groups on antimony atom with chloride groups. As the Lewis acidity is increased in regular steps (see figure), essentially linear response is observed initially, however then a sudden change in the P-Sb distance takes place during one particular step. This is consistent with a sudden switch from a non-bonding to a bonding interaction, that is, a discrete rather than continuum response.
- Chalmers, Brian A.,Bühl, Michael,Athukorala Arachchige, Kasun S.,Slawin, Alexandra M. Z.,Kilian, Petr
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supporting information
p. 7520 - 7531
(2015/05/13)
-
- Coordination complexes of Ph3Sb2+ and Ph 3Bi2+: Beyond pnictonium cations
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The syntheses of salts containing ligand-stabilized Ph3Sb 2+ and Ph3Bi2+ dications have been realized by in situ formation of Ph3Pn(OTf)2 (Pn=Sb or Bi) and subsequent reaction with OPPh3, dmap and bipy. The solid-state structures demonstrate diversity imposed by the steric demands and nature of the ligands. The synthetic method has the potential for broad application enabling widespread development of the coordination chemistry for PnV acceptors. A coordinated effort: The synthesis and characterization of OPPh 3, dmap (4-(dimethylamino)pyridine), and bipy (2,2′-bipyridine) complexes of SbV and BiV are reported. The solid-state structures demonstrate structural diversity driven by the steric demands and the nature of the ligands.
- Robertson, Alasdair P. M.,Burford, Neil,McDonald, Robert,Ferguson, Michael J.
-
supporting information
p. 3480 - 3483
(2014/04/03)
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- 31P NMR studies demonstrating the assembly of catena-phosphorus frameworks from chlorophosphinochlorophosphonium cations
-
New examples of chlorophosphinochlorophosphonium (4) and chlorophosphinodichlorophosphonium (5) cations have been prepared and spectroscopically characterized. These bifunctional phosphinophosphonium cations offer a new approach to the development of phosphinophosphonium frameworks using reductive coupling reactions and have been exploited as synthons to assemble larger catena-phosphorus cations. The reactions of 4 and 5 with stibine reducing agents have been studied using 31PP NMR spectroscopy and have been shown to produce a variety of new and known frameworks in a facile manner, depending on the reducing agent selection and the stoichiometry of the reaction. New derivatives of frameworks containing three, four, and five phosphorus atoms have been identified by 31PPNMRspectroscopy. Crystals of the [GaCl4]- salt of the five-membered dication 11(iPr) have been isolated from the reaction of [4( iPr)][GaCl4] with SbBu3, and the solid state structural features and solution state dynamics are comprehensively described in the context of 31P{1H} NMR spectroscopic observations.
- Carpenter, Yuen-Ying,Burford, Neil,Lumsden, Michael D.,McDonald, Robert
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p. 3342 - 3353
(2011/06/26)
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- Synthesis of N,C bound sulfur, selenium, and tellurium heterocycles via the reaction of chalcogen halides with -CH3 substituted diazabutadiene ligands
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A series of N,C bound chalcogen heterocycles from the reaction of chalcogen halides (ChXn; Ch ) S, Se Te; X ) Cl, Br; n ) 2, 4) with N-alkyl or N-aryl 1,4-diazabutadiene (DAB) ligands featuring methyl substituents on the backbone C-C linkage ar
- Jason L. Dutton,Caleb D. Martin,Michael J. Sgro,Nathan D. Jones,Ragogna, Paul J.
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p. 3239 - 3247
(2009/09/04)
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- A tert-butyl/cyano substituted (1,2,3,5-dithiadiazolyl)benzene and η2 π complexes with CpCr(CO)2
-
A rational synthesis for 5-tert-butyl-3-cyano-1-(1,2,3,5-dithiadiazolyl)benzene, which was first observed from thermal cleavage of the bis-dithiadiazolyl, has been developed. Voltammetry and electron paramagnetic resonance (EPR) spectra for this radical are reported and its X-ray structure is described. Despite the bulky tBu substituent, the cyano supramolecular synthon is still able to maintain links to a single neighbouring sulfur atom of the S2 unit, as previously observed in cyano-substituted dithiadiazolyls. In the η2 complex with CpCr(CO)2, no such interactions are observed; the nitrile group forms a centrosymmetric dimer through weak contacts with the para H atom on the aryl ring of the partner molecule. This behaviour is contrasted to similar complexes of less bulky dithiadiazolyls, where intermolecular interactions are retained in the crystalline lattice.
- Boeré, René T.,Goh, Lai-Yoong,Ang, Chwee Ying,Kuan, Seah Ling,Lau, Hiu Fung,Lin Ng, Victor Wee,Roemmele, Tracey L.,Seagrave, Sonja D.
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p. 2697 - 2704
(2008/02/03)
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- Synthesis and spectroscopic studies of antimony pentachloride complexes with neutral oxygen, sulfur and selenium ligands
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The compounds [SbCl5(R3EY)] (R = Me or Ph; E = P or As; Y = O or S) have been prepared from SbCl5 and the appropriate ligand in CH2Cl2 or CCl4 solutions, and characterised by analysis, IR,
- Corcoran, Sarah M.,Levason, William,Patel, Rina,Reid, Gillian
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p. 1263 - 1268
(2008/10/09)
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- Chlorination of p-substituted triarylpnictogens by sulfuryl chloride: Difference in the reactivity and spectroscopic characteristics between bismuth and antimony
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Competitive oxidative chlorination of p-substituted triarylstibines 3 [(p-XC6H4)3Sb; a: X = OMe, c: Cl, d: CO 2Et, e: CF3, f: CN, g: NO2] by sulfuryl chloride was carried out against 3b (X = H) and the electronic effect of these substituents on the chlorination of 3 was compared with that of homologous triarylbismuthanes 1. The relative ratios 4/4b (Ar3SbCl 2/Ph3SbCl2) decreased with increasing electron-withdrawing ability of the substituents (a: 53/47, c: 49/51, d: 46/54, e: 44/56, f: 40/60, g: 37/63), but the tendency was not so pronounced as observed in the chlorination of 1. A Hammett plot of the 4/4b ratios against the σp constants exhibited a good linear relationship with a negative slope, the value of which was almost half of that deduced from the 2/ 2b (Ar3BiCl2/Ph3BiCl2) ratios. The difference in the reactivity between 1 and 3 may be explained by the effect of the electron-withdrawing substituents in the aromatic rings, which affects the p-character of the lone pair on the pnictogen atoms by increasing the positive metal charge and appears more remarkably in 1 than in 3. The 13C NMR study of 3 revealed that the chemical shifts of the ipso carbons (C1) attached to the antimony show a linear relationship against the σp constants with a positive slope (14.5). The value was smaller than that deduced from 1 (17.0), suggesting that the antimony center of 3 is less sensitive to the substituent effect. This is in accord with the tendency of the chlorination.
- Rahman, A.F.M. Mustafizur,Murafuji, Toshihiro,Ishibashi, Motoko,Miyoshi, Youhei,Sugihara, Yoshikazu
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p. 4280 - 4284
(2007/10/03)
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- Triphenylphosphinimino-triphenylstibonium chloride, [Ph 3PNSbPh3Cl], and its reaction with FeCl3
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[Ph3PNSbPh3Cl] (1) was prepared by oxidative addition of ClNPPh3 to triphenylstibine in dichloromethane solution. The compound is characterized by IR spectroscopy and by an X-ray structure determination. 1 crystallizes in the monoclinic space group P21/c with four formula units per unit cell. Lattice dimensions at 193 K: a = 925.3(1), b = 1777.2(1), c = 1825.5(1) pm, β = 94.07(1)°, R1 = 0.0228. 1 forms monomeric molecules with tetrahedrally coordinated phosphorus and trigonal-bipyramidally coordinated antimony atom, the atoms N and Cl being in axial positions. The bond lengths PN and SbN are 155.0(2) and 198.4(2) pm, respectively, the PNSb angle is 138.6(1)°. 1 reacts with iron trichloride to give the known phosphoraneiminato complex [FeCl2(NPPh 3)]2.
- Neumueller, Bernhard,Dehnicke, Kurt
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p. 1360 - 1362
(2008/10/09)
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- Effect of π-accepting substituent on the reactivity and spectroscopic characteristics of triarylbismuthanes and triarylbismuth dihalides
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Competitive chlorination of p-substituted triarylbismuthanes 1 [(p-XC6H4)3 Bi; a: X = OMe, c: Cl, d: CO2Et, e: CF3, f: CN, g: NO2] and trimesitylbismuthane (2,4,6-Me3C6H2) 3Bi 1h by sulfuryl chloride was carried out against 1b (X = H) and the effect of these substituents on the formation of triarylbismuth dichlorides 2 was studied. The relative ratios 2/2b decreased with increasing electron-withdrawing ability of the substituents (2a/2b = 53/47, 2c/2b = 33/67, 2d/2b = 35/65, 2e/2b = 29/71, 2f/2b = 16/84, 2g/2b = 0/100, 2h/2b = 46/54), indicating a lowering of reactivity of the lone pair on the bismuth atom. Pd-Catalyzed degradation of 2a-g and their difluorides 3 giving biaryls 4 was promoted by the electron-withdrawing p-substituents in the equatorial aryl groups but suppressed by the more electronegative fluorine atoms in the apical positions. This is in fairly good accord with the stability of the trigonal bipyramidal geometry. The 13 study of 1-3 showed that the signals due to the ipso carbons (C1) attached to the bismuth atom shift downfield with increasing electron-withdrawing nature of the p-substituents. No such tendency was observed in other aromatic ring carbons. The electronic effect on the C1 atoms, similar to that on the chlorination of 1 and degradation of 2 and 3, indicates the significant participation of the C1 atoms in these reactions through the Bi-C1 bonds.
- Rahman, A.F.M. Mustafizur,Murafuji, Toshihiro,Ishibashi, Motoko,Miyoshi, Youhei,Sugihara, Yoshikazu
-
p. 3395 - 3401
(2007/10/03)
-
- Phenylation of Antimony(V) Organic Compounds with Pentaphenylantimony. The Structure of Tetraphenylantimony Chloride
-
Tetraphenylantimony chloride and bromide were synthesized through the reaction of pentaphenylantimony with diphenylantimony trichloride or tribromide taken at a molar ratio of 2:1 in toluene. When the initial compounds were taken at a molar ratio of 1:1, triphenylantimony dichloride or dibromide was formed. The phenylation of triphenylantimony sulfate with pentaphenylantimony yielded tetraphenylantimony sulfate. According to the X-ray diffraction data, the antimony atom in the tetraphenylantimony chloride molecule has a distorted trigonal bipyramidal configuration with the chlorine atom in the axial position. The Sb-Cl distance is equal to 2.686(1) and Sb-C distances are equal to 2.113(4) and 2.165(4) A (av. 2.130 A).
- Sharutin,Sharutina,Pakusina,Platonova,Zadachina,Gerasimenko
-
-
- Pd-catalyzed C-arylation of unsaturated compounds with pentavalent triarylantimony dicarboxylates
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Triarylantimony (V) derivatives Ar3SbX2 (X = Hal or acyloxy) were prepared by reaction of Ar3Sb with equimolar amounts of a peroxide ROOH (R = t-Bu, H) in the presence of an acid or an anhydride in good to excellent yields. Ar3Sb(O2CR)2 are mild and efficient C-arylation reagents of unsaturated compounds (methyl acrylate, styrene, 2-phenylpropene and acrylonitrile) under palladium catalysis at 50 °C, with PdCl2 being the most effective catalyst. Ar3SbHal2 do not react under these conditions.
- Moiseev, Dmitry V.,Gushchin, Aleksey V.,Shavirin, Andrey S.,Kursky, Yury A.,Dodonov, Viktor A.
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p. 176 - 184
(2007/10/03)
-
- Synthesis and structures of triphenylantimony oximates
-
The reactions of triphenylantimony or trimethylantimony with tert-butyl hydroperoxide in the presence of acetone oxime, acetophenone oxime, cyclohexanone oxime, or benzaldehyde oxime afforded monomeric triorganoantimony oximates Ph3Sb(ON=CMesu
- Dodonov,Gushchin,Gor'Kaev,Fukin,Starostina,Zakharov,Kurskii,Shavyrin
-
p. 1051 - 1057
(2007/10/03)
-
- Reactions of trans-[OsO2Cl2L2] (L = PPh3, AsPh3, SbPh3) with acetic acid
-
The possibility of reactions between trans-[OsO2Cl 2L2] (L = PPh3, AsPh3, SbPh 3) osmium(VI) complexes and glacial acetic acid to give osmium(IV) compounds of general formula [Os2/sub
- Belyaev,Eremin,Simanova,Evreinova
-
p. 1907 - 1910
(2007/10/03)
-
- trans-4,4'-Dichloro-1,1',2,2',3,3'-tetrathiadiazafulvalene (DC-TAF) and its 1:1 radical cation salts [DC-TAF][X]: Preparation and solid-state properties of BF4-, ClO4-, and FSO3- derivatives
-
Reductive coupling of 4,5-dichloro-1,2,3-dithiazolylium chloride yields trans-4,4'-dichloro-1,1',2,2',3,3'-tetrathiadiazafulvalene (DC-TAF), the first example of this heterofulvalene system. Ab initio molecular orbital (B3LYP/6-31G**) calculations on prototypal TAF confirm that the closed shell 1A(g) state lies 22 kcal mol-1 below the 3B(u) diradical triplet. Cyclic voltammetry on DC-TAF reveals two reversible oxidation waves at 0.80 and 1.25 V (in CH3CN, reference SCE). The ESR signal (g = 2.0117) of the radical cation [DC-TAF]+ (in SO2(1)) exhibits a five-line hyperfine coupling pattern with a(N) = 0.096 mT. DC-TAF forms a series of 1:1 radical ion salts [DC-TAF][X] by electrooxidation in the presence of tetrahedral counterions (X- = BF4-, ClO4-, FSO3-). The crystal structures of these salts are isomorphous, monoclinic space group P21/n, and consist of one- dimensional ladder-like arrays of [DC-TAF]+ radical cations bridged by S- - -S contacts ranging from 3.5 to 3.7 ?. Variable-temperature conductivity and magnetic measurements on [DCTAF][ClO4] indicate Mott insulator behavior, with a measured band gap of 0.30 eV.
- Barclay,Beer,Cordes,Haddon,Itkis,Oakley,Preuss,Reed
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p. 6657 - 6663
(2007/10/03)
-
- Electrochemistry of hypervalent compounds - V. Anodic oxidation of trivalent organoantimony and organobismuth compounds
-
Anodic oxidation of triphenylantimony in the presence of various oxygen nucleophiles or halide ions provided the corresponding hypervalent compounds having Sb - Y bonds (Y = RCOO, F, Cl, Br) in good yields. On the contrary, anodic oxidation of triphenylbi
- Fuchigami, Toshio,Miyazaki, Motoko
-
p. 1979 - 1984
(2008/10/08)
-
- On the reaction of SbPh3 with S3N2Cl2. Crystal structures of [Ph3SbSNSN] and [(Ph3SbCl2)2·S4N4]
-
Triphenylantimony reacts with S3N2Cl2 in dichloromethane solution to give yellow crystals of the cyclostibathiazene derivative [Ph3SbSNSN]. As a by-product orange single crystals of [(Ph3SbCl2)2S4N4] were isolated, in which the molecular compounds Ph3SbCl2 and S4N4 only form van der Waals contacts with one another. Both compounds are characterized by crystal structure determinations. [Ph3SbSNSN]: Space group P2I/n, Z = 4; lattice dimensions at -80°C: a = 759.4(1), b = 1448.5(3); c = 1557.6(2) pm; β = 91.09(1)°, R = 0.026. The complex has a molecular structure in which the Sb atom is coordinate in a distorted trigonal-bipyramidal fashion with one phenyl group and one of the nitrogen atoms of the planar SbSNSN ring in the apical positions. [(Ph3SbCl2)2·S4N 4]: Space group C2/c, Z = 8; lattice dimensions at -60°C: a = 1549.3(1), b = 1017.7(1), c = 2623.9(1) pm, β = 105.56(2)°, R = 0.050.
- Kunkel, Frank,Harms, Klaus,Kang, Hak-Chul,Massa, Werner,Dehnicke, Kurt
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p. 193 - 198
(2007/10/03)
-
- Syntheses of Cyclic Triphenylantimony(V) Catecholates from Triphenylantimony, tert-Butyl Hydroperoxide, and Polyhydric Phenols
-
Cyclic triphenylantimony(V) catecholates are prepared by reactions of triphenylantimony with polyhydric phenols (pyrogallol, hydroxyhydroquinone, and quercetin) in the presence of tert-butyl hydroperoxide. Triphenylantimony reacts with polyhydric phenols selectively at the o-hydroxy groups to give the corresponding Sb(V) derivatives.
- Dodonov,Fedorov,Zaburdyaeva
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p. 1460 - 1462
(2007/10/03)
-
- Tri- and di-arylantimony( V) thiocyanates and mixed halide thiocyanates; crystal structure of triphenylantimony( V) di-isothiocyanate
-
A series of triarylantimony(V) dithiocyanates has been prepared by oxidising the appropriate antimony(III) compound with thiocyanogen. IR and 14N NMR spectroscopy indicate the presence of terminally N-bonded thiocyanate groups and this has been confirmed by a crystal structure determination for the SbPh3(NCS)2. The asymmetric unit contains three independent trigonal bipyramidal molecules, which differ in the orientations of the axial N-bonded thiocyanates and the phenyl groups in the equatorial plane, and there may be weak C-H ... S interactions. Treatment of SbPh2X3, where X = Br or Cl, with KSCN gave K[SbPh2(NCS)4] and attempts to prepare SbPh2(NCS)3 and related diphenylantimony(V) mixed halide thiocyanates, SbPh2Xn(NCS)3 - n where X = Br or Cl and n = 0-2, by treating appropriate diphenylantimony(III) precursors with thiocyanogen or thiocyanogen bromide or chloride gave products which in many cases underwent reorganisation during recrystallisation. Samples of SbPh2(NCS)3, SbPh2Br(NCS)2, SbPh2Br2(NCS) and SbPh2Cl2(NCS), and SbPh3Br(NCS) have, however, been isolated as microcrystalline solids.
- Forster, Glynis E.,Begley, Michael J.,Sowerby, D. Bryan
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p. 263 - 274
(2007/10/03)
-
- Syntheses of antimony(V) derivatives from trimethyl and triphenylantimony(III), dihydric phenols, and tert-butyl hydroperoxide
-
Trimethyl and triphenylantimony o-phenylene dioxides were obtained by the reaction of trimethyl- and triphenylantimony with pyrocatechol in the presence of tert-butyl hydroperoxide in 68 and 81percent yields, respectively. 7,7,7,15,15,15-hexamethyl-(and p
- Dodonov, V. A.,Fedorov, A. Yu.,Usyatinsky, R. I.,Zaburdyaeva, S. N.,Gushchin, A. V.
-
p. 730 - 733
(2007/10/02)
-
- Synthesis and structure of the dimeric organo-antimony (V) imido complex 2
-
The amine PhCH2CH2NH2 undergoes dimetallation by (1) under mild conditions to give the first structurally authenticated example of an organo-Sb(V) imido complex, 2 (2).Keywords: Antimony; Imido; Crystal structure; Group
- Edwards, Andrew J.,Paver, Michael A.,Pearson, Philip,Raithby, Paul R.,Rennie, Moira-Ann,et al.
-
p. C29 - C31
(2007/10/03)
-
- Cleavage of Pentaphenyl Arsenic and Antimony Derivatives with Halogens and Interhalogens
-
Facile and specific cleavage of metal-carbon bond(s) has been found to occur when pentaphenyl-arsenic or-antimony derivatives are treated with halogens (Br2, I2) and inter-halogens (ICl, IBr) under controlled conditions.
- Raizada, Meenu Singh,Nigam, H. L.
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p. 722 - 724
(2007/10/02)
-
- Donor Properties of Triphenylantimony Dihalides: Preparation and Crystal Structures of Ph3SbCl2*SbCl3 and
-
Triphenylantimony dichloride reacts with both antimony(III) and antimony(V) chloride to give addition compounds with the stoicheiometry Ph3SbCl2*SbCl3 and Ph3SbCl2*SbCl5, respectively.X-Ray analysis of the former shows the presence of only weak interactions between the axial chlorine atoms of Ph3SbCl2 and adjacent SbCl3 molecules to give polymeric chains parallel to the a axis.The trigonal bipyramidal geometry of Ph3SbCl2 is little changed; co-ordination about SbIII is square pyramidal with three short (mean 2.337 Angstroem) and two long (mean 3.262 Angstroem) distances.In the SbCl5 compound there is a chloride ion transfer to SbCl5 giving a structure best described in terms of the ionic formulation +-.Residual anion-cation interaction is shown by a Cl...Sb contact of 3.231 Angstroem, and the cation geometry is intermediate between the trigonal pyramidal and tetrahedral extremes.Reactions between Ph3SbX2 (X = F, Br, or I) and SbCl3, SbBr3, or SbCl5 are also described.
- Hall, Michael,Sowerby, D. Bryan
-
p. 1095 - 1100
(2007/10/02)
-
- Metal Derivatives of Organoantimony Compounds: Reactions of Anhydrous Ferric Chloride with Arylantimony Compounds
-
Reactions of anhydrous ferric chloride with arylantimony compounds have been studied.Tetraphenylstibonium chloride reacts with ferric chloride to give complex salts and 2.Ph4SbCl while triphenylantimony dichloride forms adducts of the type Ph2SbCl2.2FeCl3.Ferric chloride reacts with triphenylstibine to form triphenylstibine dichloride and in the process it is reduced to bivalent state.The complexes have been characterized on the basis of elemental analyses, Moessbauer and IR spectral data, magnetic susceptibility and conductivity measurements.
- Sharma, Hemant K.,Singh, Soran,Dubey, S. N..,Puri, D. M.
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p. 619 - 621
(2007/10/02)
-
- Sulphur Dioxide Insertion Reactions in Triphenylantimony(V) Bis-chelates
-
Bis-chelated triphenylantimony(V) compounds take up one molecule of sulphur dioxide in a medium of liquid sulphur dioxide to form mono-insertion products, Ph3SO2SbL2 where L = salicylaldehyde, β-diketones, 2-hydroxybenzophenones, benzoylphenyl hydroxylamine, 8-hydroxyquinoline, dehydroacetic acid etc.Infrared spectral studies show that the products are O-sulphinates, the insertion taking place between antimony and one of the phenyl groups.
- Sonsale, A. Y.,Chatterjee, A. K.,Gopinathan, Sarada,Gopinathan, C.
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p. 1121 - 1122
(2007/10/02)
-
- Chlorine-containing mixed halogen adducts of triphenylphosphine, triphenylarsine, and triphenylstibine
-
Conductometric titrations of PPh3Cl2 and AsPh3Cl2 with halogens and interhalogens show that the reactions are simple leading to the formation of adducts of types MPh3Cl2X2 (M = P
- Ali, M. Farhat,Harris, Gordon S.
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p. 1545 - 1549
(2007/10/02)
-
- The chloramination of some substituted stibines
-
Trimethyl-, triethyl-, tri-n-propyl-, tri-n-butyl-, and triphenylstibines react with ammonia-free chloramine or an ammonia-chloramine mixture to produce compounds of the type [R3Sb(Cl)]2NH (I). These compounds readily hydrolyze to [R3Sb-(Cl)]2O (II ). Further reactions of II are also described. Infrared and proton magnetic resonance studies were carried out on compounds of types I and II and on a variety of other antimony compounds. Qualitative assignments of infrared bands are given.
- McKenney, Robert L.,Sisler, Harry H.
-
p. 1178 - 1182
(2007/10/18)
-