Synthetic, spectroscopic and structural aspects of triphenylantimony(V) complexes with internally functionalized oximes: crystal and molecular structure of [Ph3Sb{ONC(Me)C5H4N-2}2]

Gupta, Anjali; Sharma, Ramavtar; Bohra, Rakesh; Jain, Vimal K.; Drake, John E.; Hursthouse, Michael B.; Light, Mark E.

doi:10.1016/s0277-5387(02)01155-5

Cited by 67 publications

(27 citation statements)

References 28 publications

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“…Oximes, including internally functionallized oximes, constitute an important class of N/O type donor ligands [34][35][36][37][38][39] because of their varying coordination abilities with the metal centers. Our previous studies on oximato complexes with some main group and transition metals show quite interesting structural features in both the solution and solid states [40][41][42][43][44][45][46][47]. The distinctive preference of the vanadium ion for these types of ligands has further promoted the synthesis and characterization of many model complexes containing N/O donor ligands [2,3,6,12,25,33,48,49].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of some oxovanadium(V) complexes with internally functionallized oximes. Crystal and molecular structure of heptacoordinated [VOCl{ON=C(CH3) (C4H3S-2)}2] · CH3OH

Sharma

Bohra

et al. 2007

Transition Met Chem

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New heteroleptic oxovanadium(V) chloro oximato complexes of the type [VO{Cl} 3-n {ON=C(CH 3 )(Ar)} n ] (where Ar = C 4 H 3 O-2, C 4 H 3 S-2, C 5 H 4 N-2 and n = 1 or 2) have been synthesized in excellent yields by the reaction of VOCl 3 with the sodium salts of corresponding internally functionallized oximes in refluxing anhydrous benzene. The complexes are characterized by elemental analyses and spectroscopic techniques (FT-IR, 1 H-, 1 3C{ 1 H}-and 51 V-NMR). FAB mass spectral analysis of one of the derivatives, [VOCl{ON=C(CH 3 )C 4 H 3 S} 2 ] indicates the monomeric nature of the complex. 51 V-NMR spectral studies of these complexes suggest tetra-coordination around the vanadium atom in solution. However, the single crystal X-ray diffraction study of a redistribution product [VOCl{ON=C(CH 3 )(C 4 H 3 S-2)} 2 ] AE CH 3 OH obtained on recrystallization of [VOCl 2 {ON=C(CH 3 )(C 4 H 3 S-2)}] from a methanol-hexane mixture shows the vanadium(V) atom is hepta-coordinated with distorted pentagonal bipyramidal geometry. The oxo-atom occupies the axial position while the weakly coordinated CH 3 OH group is trans to the V=O atom. The two oximato ligands in the approximate pentagonal plane are bonded to the central vanadium atom in dihapto (g 2 -N, O) manner with the formation of three-membered rings. The V-Cl bond occupies the fifth position in the approximate plane.

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Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of some oxovanadium(V) complexes with internally functionallized oximes. Crystal and molecular structure of heptacoordinated [VOCl{ON=C(CH3) (C4H3S-2)}2] · CH3OH

Sharma

Bohra

et al. 2007

Transition Met Chem

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“…Oximes were prepared by conventional methods. [7,11] Aluminum isopropoxide was prepared by the reported method and distilled before use. [12] Silicon was estimated gravimetrically as SiO 2 and nitrogen was estimated by the Kjeldahl method.…”

Section: Methodsmentioning

confidence: 99%

“…The IR spectra of the reported compounds were interpreted by comparing with the spectra of the free oximes and related derivatives [7] ( Table 3). The absence of vibrations corresponding to the hydroxyl group of oximes (3200-3400 cm −1 ) together with the presence of a new strong intensity vibration in the region 790-852 cm −1 (assigned to ν Si-O) indicated deprotonation of the oxime and concomitant bond formation with silicon.…”

Section: Ir Spectramentioning

confidence: 99%

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Low‐temperature sol–gel transformation of methyl silicon precursors to silica‐based hybrid materials

Dhayal

Bohra

Nagar

et al. 2008

Applied Organom Chemis

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studies suggested the oximate ligands to be monodentate in solution, which was confirmed by 29 Si{ 1 H} NMR signals in the region expected for tetra-coordinated methylsilicon (IV) derivatives. Thermogravimetric analysis of 1 revealed the complex to be thermally labile, decomposing to a hybrid material of definite composition. Two representative compounds (2 and 4) were studied as single source molecular precursor for low-temperature transformation to silica-based hybrid materials using sol-gel technique. Formation of homogenous methyl-bonded silica materials (MeSiO 3/2 ) at low sintering temperature was observed. The thermogravimetric analysis of the methylsilica material indicated that silicon-methyl bond is thermally stable up to a temperature of 400

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“…The increased value of the equatorial angle in I , as well as in triorganylantimony dicarboxylates, is observed on the side of intramolecular contacts. It should be mentioned that of all structurally characterized triarylantimony dioximates [3,4,7,9,10], complex I exhibits the maximum equatorial CSbC angle on the side of the intramolecular Sb···N contacts. In complex I, the size of the molecular cavity is determined by the shortest distance (2.8 Å) between the opposite atoms of the macrocycle.…”

Section: Synthesis Of Imentioning

confidence: 99%

Synthesis and structure of bis-μ-[(methylenedicyclopentanone-2,2′-dioximato)triphenylantimony]

Шарутин

Molokova²,

Шарутина

et al. 2005

Russ J Coord Chem

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The reaction of pentaphenylantimony with methylenedicyclopentanone-2,2' dioxime affords bis-µ -[(methylenedicyclopentanone-2,2'-dioximato)triphenylntimony] having, according to the X-ray diffraction data, a centrosymmetric structure with two Ph 3 Sb moieties linked by dioxime bridges. The antimony atom has a distorted trigonal bipyramidal coordination. The Sb-C bond lengths vary in an interval of 2.111(1)-2.137(3) Å, and the Sb-O distances are equal to 2.064(1) and 2.0663(9) Å. The molecule contains short intramolecular contacts Sb···N of 2.876(1) and 2.910(1) Å.

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Synthetic, spectroscopic and structural aspects of triphenylantimony(V) complexes with internally functionalized oximes: crystal and molecular structure of [Ph3Sb{ONC(Me)C5H4N-2}2]

Cited by 67 publications

References 28 publications

Synthesis and characterization of some oxovanadium(V) complexes with internally functionallized oximes. Crystal and molecular structure of heptacoordinated [VOCl{ON=C(CH3) (C4H3S-2)}2] · CH3OH

Synthesis and characterization of some oxovanadium(V) complexes with internally functionallized oximes. Crystal and molecular structure of heptacoordinated [VOCl{ON=C(CH3) (C4H3S-2)}2] · CH3OH

Low‐temperature sol–gel transformation of methyl silicon precursors to silica‐based hybrid materials

Synthesis and structure of bis-μ-[(methylenedicyclopentanone-2,2′-dioximato)triphenylantimony]

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