Silver(I) Complexes Containing Diphosphine and Bis(Phosphine) Disulphide Ligands

Abstract

In this study, the reactions of AgNO₃ and AgClO₄ with diphosphine [Ph₂P(CH₂)₂PPh₂(dppe)] and bis(phosphine)- disulphide ligands (L-L) (L-L = Ph₂P(S)(CH₂)n P(S)Ph₂; n = 2, dppeS₂; n = 3, dpppS₂) have been investigated. The reaction of AgClO₄ with dppe was resulted the bridging complex [Ag(μ-OClO₃)(dppe)]₂ (1). The reactions of AgNO₃ with the ligands (L-L) (L-L = dppeS_2, dpppS₂), gave two new dimeric [Ag₂(μ-L-L)₂](NO₃)₂ complexes (2) and (3), respectively. The products were characterized by elemental analysis, IR, ³¹P{¹H} NMR, electrospray mass and FAB mass spectrometry. It has been found that the complexes (1) and (2) have shown moderately antimicrobial activity against some gram (+) and gram (-) bacteria.