Au-O Interactions, and others in triphenylphosphinegold(I) sulfanylpropenoates with diverse structures

We investigated the reactions of triphenylphosphinegold(I) chloride in ethanol or methanol with the 3-(2-aryl)-2-sulfanylpropenoic acids H(2)xspa [x = f, t, p; f = 3-(2-furyl)-, t = 3-(2-thienyl)-, p = 3-phenyl-; spa = 2-sulfanylpropenoato] in 1 : 1 and 2 : 1 mole ratios, and the reactions of diisopropylamine with the 1 : 1 complexes. Compounds of types [Au(PPh3)(Hxspa)], [HQ][Au(PPh3)(xspa)] (HQ = diisopropylammonium) and [(AuPPh3)(2)(xspa)] were isolated and characterized by IR, Raman and FAB mass spectrometry and by H-1, C-13 and P-31 NMR spectroscopy. The structures of (Htspa)(2).-Me2CO and of the complexes [Au(PPh3)(Hfspa)] (1), [HQ][Au(PPh3)(pspa)] (6), [(AuPPh3)(2)(fspa)] (7), [(AuPPh3)(2)(tspa)].2MeOH (8.2MeOH) and [(AuPPh3)(2)pspa].2MeOH (9.2MeOH) were determined by X-ray diffractometry; those of the Au complexes exhibit pi-stacking, hydrogen bonding and Au An and Au-O interactions as well as the expected Au-S and Au-P bonds.