H. Vogt, S. Trojanov, V. Rybakov
Jul 20, 1993
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ChemInform
Abstract
Bromotriphenylphosphonium tribromide, [(C 6 H 5 ) 3 PBr]Br 3 , has been prepared by the reaction of triphenylphosphine with bromine in dichloromethane. Light-brown crystals are obtained by recrystallization from the same solvent. The crystal and molecular structure of the title compound has been determined. The crystals are monoclinic, space group P2 1 /c, Z=8; a=1917.1(8), b=1182.2(9), c=1823.5(4) pm, β=108.34(2) o . R=0.056 (R w =0.063) for 1813 reflections with I≥3σ(I). In the solid state the title compound exists as discrete monomeric (C 6 H 5 ) 3 PBr + and Br 3 - ions with two crystallographically independent ions of each sort