THE CRYSTAL-STRUCTURE OF A CHELATE SILVER(I) COMPLEX - (AG[PH(2)P(CH2)(2)SCH2CH3](2))CLO4

A single crystal of the {Ag[Ph(2)P(CH2)(2)SCH2CH3)ClO4 complex, [Ag(PS Et)(2)]ClO4, has been isolated from anhydrous propylene carbonate solu tion containing AgClO4 and the ligand in a 1:2 ratio. An X-ray diffrac tion analysis, carried out by adopting the heavy-atom method, shows th at no solvent molecules are present in the adduct, enabling the PSEt l igand to behave as a chelating agent, both P and S atoms being coordin ated to the metal ion. The coordination geometry around silver(I) can be described as a distorted tetrahedron with a P-Ag-P' angle of 148.9( 1)degrees; this is most likely due to the repulsion between two phenyl rings (C4...C4'=3.96 Angstrom) which has the further consequence of l owering the S-Ag-P bond angle to 82.5(1)degrees.