Syntheses and structures of silver(I) clusters uniquely exhibiting three distinct binding modes,two of which are novel,for a dithiophosphate ligand

摘要

An unprecedented,triply bridging sulfur atom of the dithiophosphate ligand was observed in the new silver cluster cation,Ag_4(mu-dppm)_2[S_2P(OEt)_2]_3~+,where the coordination geometry for the trifurcated sulfur atom exhibited distorted seesaw.Dialkyl dithio-phosphates (phosphinates or phos-phonates) are versatile ligands and displaying a variety of coordination patterns which lead to a great diversity of molecular and supramolecular structures [1].Their metal complexes have important industrial applications and academic interests,e.g.,lubricant additives [2],solvent extraction reagents for metals [3],potential luminescent sensors [4],agricultural insecticides derivatives [5],precursors for use in metal-organic chemical vapor depositions [6],and model compounds for metal-containing enzymes [7].Thus the understanding of the chemistry of their metal derivatives especially the interaction of metal-sulfur bonding is important in relation with these uses [lb].