Synthese und Kristallstruktur von Bromotriphenylphosphoniumtribromid, [(C 6 H 5 ) 3 PBr]Br 3 / Synthesis and Crystal Structure of Bromotriphenylphosphonium Tribromide, [(C 6 H 5 ) 3 PBr]Br3

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 det...

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Veröffentlicht in:Zeitschrift für Naturforschung. B, A journal of chemical sciences A journal of chemical sciences, 1993-03, Vol.48 (3), p.258-262
Hauptverfasser: Vogt, H., Trojanov, S. I., Rybakov, V. B.
Format: Artikel
Sprache:eng
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Zusammenfassung: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)°. 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. The cations have a slightly irregular tetrahedral geometry around the P atom. The tribromide anions are nearly symmetrical and slightly bent.
ISSN:0932-0776
1865-7117
DOI:10.1515/znb-1993-0302