Synthesis,thermal, spectroscopic,and X-ray studies of (dichloroacetato)(triphenylphosphine)gold(I)

The synthesis, thermal, spectroscopic, and X-ray investigation of (dichloroacetato) (triphenylphosphine)gold(I), Au(C₂HCl₂O₂)(C₆H₅)₃P] are reported. The thermal analysis showed that the decomposition of the studied complex is a two step process and the mechanism of the decomposition has been proposed. IR and¹³C NMR spectra of the complex are given. The compound crystallizes in the monoclinic space groupP2 ₁/n with four molecules per unit cell.M _r =587.19,a=11.455(1),b=12.398(3),c=14.718(2)Å,=104.95(1)°,V=2019.5(6)ų,D _x=1.931g/cm³,(Cu K)=172.6 cm^–1,F(000)=1120. FinalR=0.059 for 2780 absorption-corrected reflections. The crystals are not isostmctural with acetato(triphenylphosphine) gold(I) and (trifluoroacetato)-(triphenylphosphine)gold(I). The Au-O1 bond length is of 2.049(9), Au-P of 2.210(3)Å with O1-Au-P angle of 176.9(2)°.