M. A. Pushilin

Triarylantimony Dicaroxylates Ar3Sb[OC(O)R]2 (Ar = Ph, p-Tol; R = 2-C4H3O, 3-C5H4N): Synthesis and Structure

Bis(2-furoinate)triphenyl- and tri-p-tolylantimony and bis(3-niacinate)triphenylanitmony were synthesized by reacting triarylantimony (Ar3Sb; Ar = Ph, p-Tol) with 2-furancarboxylic and 3-pyridinecarboxylic acids in the presence of hydrogen peroxide. According to X-ray diffraction data, Sb atoms have trigonal bipyramidal coordination polyhedra. The Sb–O distances are 2.117(4), 2.137(4) Å; 2.136(2), 2.158(2) Å, and 2.112(1), 2.101(2) Å, the Sb···O distances are 2.866(4), 2.798(4) Å; 2.816(2), 2.774(2) Å, and 3.054(2), 3.168(2) Å, respectively.

Synthesis and Structure of Bis(2,4,6-Tribromophenoxy)triphenylantimony

Bis(2,4,6-tribromophenoxy)triphenylantimony was synthesized by reacting triphenylstibine with 2,4,6-tribromophenol in ether in the presence of hydrogen peroxide. Its structure was determined by X-ray diffraction analysis. The coordination polyhedron of the Sb atom is a distorted trigonal bipyramid with the aroxy groups in the axial positions. The bond lengths are Sb(1)–C(Ph) 2.095(4)–2.106(4) Å and Sb(1)–O(1,2) 2.099(3) and 2.092(3) Å. The value of the O(1)SbO(2) axial angle is 177.3(1)°.

Organoantimony Derivatives of 2,4,6-Tribromophenol

Abstract2,4,6-Tribromophenoxytetraphenylantimony was prepared in 93% yield by the reaction of pentaphenylantimony with bis(2,4,6-tribromophenoxy)triphenylantimony Ph3Sb(OC6H2Br3-2,4,6)2 in toluene at 90°C (1 h). Bis(2,4,6-tribromophenoxy)triphenylantimony, in turn, was prepared by oxidation of triphenyl- stibine with hydrogen peroxide in the presence of 2,4,6-tribromophenol in ether at 20°C (12 h) in 47% yield, with the second reaction product being μ-oxobis[(2,4,6-tribromophenoxy)triphenylantimony] in which the antimony atom, according to single crystal X-ray diffraction, has a trigonal bipyramidal surrounding with the bridging oxygen atom and 2,4,6-tribromophenoxy substituents in the axial positions.

Novel Antimony Complexes: [Ph4Sb]4+[Sb4I16]4− · 2Me2C=O and [Ph4Sb]3+[Sb5I18]3−

The [Ph4Sb]4+[Sb4I16]4− · 2Me2C=O and [Ph4Sb]3+[Sb5I18]3− complexes were synthesized by reacting tetraphenylstibonium salts Ph4SbX (X = I, OSO2C6H4Me-4) with antimony triiodide in acetone. According to X-ray diffraction data, their tetra- and pentanuclear anions [Sb4I16]4− and [Sb5I18]3− have cyclic and linear structure, respectively.

μ-Oxo-Bis[(arenesulfonato)triphenylantimony]: Synthesis and Structure

Abstractμ-Oxo-bis[(4-methylbenzenesulfonato)triphenylantimony] (I) and μ-oxo-bis[(2,5-dimethylbenzenesulfonato)triphenylantimony] (II) were synthesized by reacting triphenylstibine Ph3Sb with tri-p-tolylbismuth bis(4-methylbenzenesulfonate) and tri-p-tolylbismuth bis(2,5-dimethylbenzenesulfonate), respectively, in toluene in the presence of air moisture. According yo X-ray diffraction data, the antimony atoms in the compounds synthesized have a distorted trigonal bipyramidal configuration. The SbOSb angles are equal to 138.5(2)° and 180°, respectively. A bent molecule I contains the Sb(1)···Sb(2) (3.690(1) Å) and Sb···S(1,2) (3.521(2), 3.559(2) Å) intramolecular contacts. In a linear molecule II, the Sb···S distances are equal to 3.438(1) Å.