SYNTHESIS AND STRUCTURE OF THE TETRAMETALLIC COMPLEX [TLAU(C5H4PPH2)2]2

The tetrametallic complex [TlAu(C5H4PPh2)2]2, 1, is obtained by reaction of [AuCl(SMe2)] with TlC5H4PPh2 in benzene solution. The structure of 1, as its benzene solvate, has been determined using X-ray diffraction methods, and reveals that each gold is coordinated by two phosphino groups and each thallium is symmetrically bound in eta-5 fashion to two cyclopentadienyls. 1 is triclinic, space group P1BAR, with a 10.572(4), b 11.343(6), c 16.056(6) angstrom, alpha-105.09(4), beta-98.96(3), gamma-107.15(4)-degrees, Z = 2, R = 0.0423 and R(w) = 0.0438 for refinement of 398 parameters using 6106 unique reflections.