Structural studies of two-coordinate complexes of tris(2-methoxylphenyl)phosphine and tris(4-methoxyphenyl)phosphine with gold(I) halides
作者:Raymond C. Bott、Peter C. Healy、Graham Smith
DOI:10.1016/j.poly.2007.01.014
日期:2007.7
A series of five gold(I) halide complexes with the two isomeric methoxy-substituted triarylphosphines, tris(2-methoxyphenyl)phosphine [P(oaniS)(3)] [AuP(oaniS)(3)X] [for X = Cl, (1); X = Br, (2) and X = I, (3)] and tris(4-methoxyphenyl)phosphine [P(paniS)(3)], [AuP(panis)(3)X] [for X = Br (4) and X = I (5)] have been synthesized and characterized by single crystal X-ray diffraction and solution P-31H-1} NMR spectroscopy. The structure determinations confirm the expected presence of linear two-coordination about the gold centres in all five complexes with bond distance and angle data typical of this type of compound [Au-P, 2.239(2)-2.259(3) angstrom; Au-Cl, 2.294(2) angstrom; AuBr, 2.385(2)-2.402(2) angstrom; Au-I, 2.546(1)-2.554(1) angstrom; P-Au-X; 175.3(1)-180 degrees]. All analogues except the iodo complex 5 crystallize with one complex molecule in the crystallographic asymmetric unit. The bromo and iodo complexes 2 and 3 constitute a trigonal isomorphous set while the bromo complex 4 is also isomorphous with the previously determined chloro complex [AuP(panis)(3)Cl]. The 2-methoxy analogues are stabilized by significant methoxy-O...Au interactions. (C) 2007 Elsevier Ltd. All rights reserved.