Synthesis,Crystal Structure and Optical Studies of a Tetranuclear Silver(I)Complex with Bis(diphenylphosphino)methane

摘要

Silver(I),whose coordination number ranging from 2 to 4,displays a wide diversity in its structural chemistry.Many silver complexes containing silver halides and neutral ligands formulated as(AgX)_mL_n are well known,which exist in different molecular ratios,even for the same X and L,and show rather different crystal structures.For example,there are five kinds of structures of(AgX)_mL_n(X = Br,L = PPh_3).As in the case of the series of(AgX)_m(dppm)_n~2(dppm = bis(diphenylphosphino)methane),they also show very interesting structures.Interest in the coordination chemistry of silver-phosphorus complexes has arisen in part from their important applications as potential antitumor,free radical scavengers and catalyzer in industrial processes since the late middle of last century.