Some metal complexes containing diphenylphosphinoacetic acid as a P-bonded neutral ligand. Crystal structures of [AuCl(Ph2PCH2CO2H)] and trans- [PdCl2(Ph2PCH2CO2H)2]0.33H2O · 0.33C2H5OH
摘要:
Diphenylphosphinoacetic acid (HA) reacts as a neutral P-donor ligand with a variety of transition metal compounds to generate the new complexes [CuCl(HA)(x)] (x = 1 or 3), trans-[PdCl2(HA)(2)], cis-[PtCl2(HA)(2)], [AuCl(HA)] and cis-[Mo(CO)(4)(HA)(2)]. The crystal structure of [AuCI(HA)] involves a linear Cl-Au-P arrange ment [179.0(1)degrees], neighbouring molecules forming hydrogen-bonded dimers in the lattice array. The hydrogen-bonding is of the planar type commonly found in free carboxylic acids with intermolecularly bonded pairs of [AuCl(HA)] molecules being related by an inversion centre. Recrystallisation of trans-[PdCl2(HA)(2)] from ethanol yields crystals of the solvate trans-[PdCl2(HA)(2)]. 0.33H(2)O . 0.33C(2)H(5)OH. The asymmetric unit contains 1.5[PdCl2(HA)(2)] molecules along with water and ethanol molecules exhibiting only half site occupancy. For every three [PdCl2(HA)(2)] molecules two are hydrogen-bonded to neighbours using carboxylic acid groups to form chains. The third molecule differs in that hydrogen-bonding occurs between one oxygen of a carboxylic acid group and the lattice water, the oxygen of which further hydrogen-bonds to the lattice ethanol. (C) 1998 Elsevier Science Ltd. All rights reserved.