Tetrasulphur tetraimide complexes of silver(I)
Abstract
Three new tetrasulphur tetraimide complexes of silver(I), Ag[ClO4]·S4N4H4(1), 2Ag[ClO4]·S4N4H4(2), and Ag[ClO4]·2S4N4H4(3), have been prepared and characterised. The mass spectra of (1) and (3) show the presence of [S4N4H4]+ species in the fragmentation pattern. Conductimetric evidence shows that the species are complex salts, [Agm(H4N4S4)n][ClO4]m(n= 1, m= 1 or 2; n= 2, m= 1), in solution. The 1H n.m.r. spectra suggest metal ion–S4N4H4 ring π complexation, and the i.r. spectra give evidence for the existence of bidentate perchlorate bridging, –OCl(O2)O–, between the silver nuclei in the solid state.