Crystal structure of bis{(di-i-butyldithiophosphinato)gold(I)}, {AuS2P(i-C4H9)(2)}(2)

The crystal structure of bis{(di-i-butyldithiophosphinato)gold(I)}, {AuS2P( i-C4H9)(2)}(2), has been determined at 223 K. The white needles are triclin ic, space group P (1) over bar, with unit-cell dimensions of a = 8.0238(5) Angstrom, b = 8.9747(6) Angstrom, c = 9.99655(7) Angstrom, alpha = 64.965(1 )degrees, beta = 79.732(1)degrees, gamma = 73.263(1)degrees, Z = 2, and D-x = 2.172 g/cm(3). The structure was solved using direct methods and refined by a full-matrix least-squares procedure to a final R(F) = 0.0278 and Rw(F -2) = 0.0638 using 2787 reflections. Bis{(di-i-butyldithiophosphinato)gold( I)} has a dimeric structure with bridging dithiophosphinate ligands and is essentially linear with an intramolecular Au ... Au distance of 3.17 Angstr om and no intermolecular interactions.