GOLD(I) COMPLEXES OF THIOCARBAMATE AND DITHIOCARBAMATE ESTERS - THE STRUCTURE OF BIS(N-METHYL-O-ETHYL-THIOCARBAMATE)GOLD(I) CHLORIDE

The complexes Au(TMDT)Br, Au(TMDT)Cl, [Au(PPh3)(TMDT)]NO3 and Au(MTC)2Cl (TMDT = N,N-dimethyl-S-methyl-dithiocarbamate, MTC = N-methyl-O-ethyl-thiocarbamate) have been prepared and characterized. The crystal structure of Au(MTC)2Cl was determined by X-ray crystallography and refined to R = 0.035 based on 2654 observed reflections. The compound is triclinic, space group P1, with a = 6.937(6), b = 9.439(5), c = 12.286(4) Å, α = 74.16(3), β = 99.54(3), γ = 108.06(3)°. The structure consists of Au(MTC)2+ cations significantly distorted from the linear coordination, with a SAuS angle of 155.3(1)° and AuS bond distances of 2.286(2) and 2.284(2) Å, and uncoordinated Cl- anions hydrogen bonded to the two MTC ligands in each cation, with NH···Cl distances of 3.04(1) Å. 1H NMR spectra of the dithiocarbamate complexes are consistent with coordination of the ligand through its thiocarbonyl sulfur atom. © 1990.