A binuclear bis{bis(dimethylphosphino)methane}disilver(I) complex with weakly bonded hexafluoroacetylacetonato ligands

Abstract

The new complex [Ag 2 (hfac) 2 (μ-dmpm) 2 ] (hfac = hexafluoroacetylacetonato, dmpm = Me 2 PCH 2 PMe 2 ) has been prepared and characterized both spectroscopically and by an X-ray structure determination (orthorhombic, Pbca (No. 61), a = 9.960(2), b = 14.694(3), c = 22.548(3) Å, Z = 4, R = 0.0495, R w = 0.0532). The data indicate that the hfac − ligands have mostly ionic character and it is suggested that this may be responsible for the low volatility of complexes [Ag(hfac)L n ] compared to [Cu(hfac)L n ]; these complexes are of interest as precursors for chemical vapour deposition of silver.