72477-06-6Relevant academic research and scientific papers
Structural and spectroscopic characterisation of linearly coordinated gold(I) tribenzylphosphane complexes
Ainscough, Eric W.,Bowmaker, Graham A.,Brodie, Andrew M.,Freeman, Graham H.,Hanna, John V.,Healy, Peter C.,Robinson, Ward T.,Skelton, Brian W.,Smith, Mark E.,Sobolev, Alexandre N.,White, Allan H.
, p. 2044 - 2053 (2010/09/06)
The 1:1 tribenzylphosphane (PBn3) complexes of gold(I)[(Bn 3P)AuX] (X = Cl and Br) have been synthesised, and their structures were determined by single-crystal X-ray crystallography. The compounds are isomorphous, neutral molecules with linearly coordinated P-Au-X arrays. Each structure contains three independent [(Bn3P)AuX] entities lying on the three threefold axes of space group P3c1. The mean bond lengths are Au-Cl 2.302(8), Au-P 2.227(11) A for the chloride and Au-Br 2.404(10), Au-P 2.229(4) A for the bromide. These contrast with the 1:1 adducts previously reported for copper(I), which take the form [Cu(PBn3] 2][CuX2]. The 1:2 AuX.:PBn3 compounds that have been synthesised are formulated as [Au(PBn3)2] X·nH2O (X = Cl, n = 1 or 2; X = I and BF4, n = O). Single-crystal X-ray structures show that linearly two-coordinate centrosymmetric [Au(PBn3)2]+ arrays are found in [Au(PBn3)2]Cl·H2O and [Au(PBn 3)2]BF4 with Au-P bond lengths of 2.2988(7) and 2.3016(7) A for the chloride and 2.2975(7) A for the tetrafluoroborate. v(AuX) bands in the far-IR spectra of [(Bn3P)AuX] are assigned at: 320 and 227 cm-1 for X = Cl and X = Br, respectively. The 31P CP MAS NMR spectra of [(Bn3P)AuX] (X = Cl, Br) and [Au(PBn 3)2]X (X = Cl·H2O, C1·2H 2O,1, BF4) are reported, and the observation of 2J(PP) coupling in the spectrum of [Au(PBn3) 2]Cl· 2H2O is consistent: with the presence in this complex of noncentrosymmetric cations in which the two phosphorus atoms are inequivalent.
