72476-74-5Relevant articles and documents
Novel ring compounds of bidentate phosphines with gold(I). Two-, three-, and four-co-ordination
Al-Baker, Salam,Hill, William E.,McAuliffe, Charles A.
, p. 2655 - 2660 (2007/10/02)
With n-butylphenylphosphine and gold(I), salts n)x> (x = 1 or 2) and n)x>+ (x = 2,3, or 4) are formed in solution and in the solid state.A range of short-chain and long-chain diphosphines (L), Ph2P(CH2)nPPh2 (n = 1,2,4,6,8,10 or 12) have been employed to prepare the neutral complexes, (x = 1 or 2), in which the gold is two-, and three-co-ordinate, respectively, and the cationic compounds 2 (x = 2,3, or 4) in which the gold is two-, three-, and four-co-ordinate.However, it was only possible to isolate the novel 2 complexes with the short-chain diphosphines, Ph2P(CH2)nPPh2 (n = 2,3, or 4).A 31P-1H> n.m.r. study employing Ph2P(CH2)6PPh2 and AuBr2- at different rations in CD2Cl2 shows the presence of two-, three-, and four-co-ordinate gold, and these species exchange with one another at temperatures > -50 deg C.A similar study at -90 deg C with the other diphosphines gave similar results, except that three- and four-co-ordination exist in the case of the short-chain ligands Ph2P(CH2)nPPh2 (n = 1 or 2) even at very low ligand:gold ratios.
