摘要:
Single crystal X-ray structure determinations are recorded for dipheny1(2-formylphenyl)phosphine gold(I) halides [Ph-2(Ph-CHO)PAuXI, X = Cl, Br and I, and for redeterminations of enhanced precision for triphenylphosphine gold(I) halides [Ph3PAuX], X = Cl, Br, I, and SCNo.siBro,os. These complexes, other than [Ph2(Ph-CHO)PAuCl], together with a diverse array of other structures, crystallize as an isomorphous series in the orthorhombic space group P212121 a = 9.804(1)-11.906(3), b = 11.771(2)-12.996(3) and c= 12.871(1)-14.169(3) A. In these complexes, introduction of the formyl group results in only minor differences between the conformations of the two phosphine ligands and the corresponding Au-P, Au-X, and Au-P-X bond lengths and angles. The crystal packings of [Ph3PALIXI for X = Cl, Br, I and of [Ph2(Ph-CHO)PAuX] for X = Br and I show that, while these structures are isomorphous, different supramolecular synthons may be present, suggesting global packing considerations are all-important rather than specific supramolecular interactions. This is borne out by the different packing found for the centrosymmetric [Ph2(Ph-CHO)PAuCl] structure. Crystallization of the mixed anion structure [Ph3PAuSCN0.s1Bro.09] in the above P212121 lattice rather than the P21/c lattice reported for pure [Ph3PAuSCH] suggests that co-crystallization with bromide may impose constraints on packing considerations which favor crystallization in the P212121 lattice. (C) 2014 Elsevier B.V. All rights reserved.