Synthesis, crystal structure and nonlinear optical properties of two new cluster compounds: [WCu3S4(PPh3)(3){S2P(OCH2Ph)(2)}] and [WA(3)OS(3) (Pb-3 P)(3)(S2P( OPri)(2)}]

Two new O,O'-dialkyl dithiophosphate-containing sulfide clusters, [WCu3S4(P Ph3)(3){S2P(OCH2Ph)(2)}] 1 and [WAg3OS3(Ph2P)(3){S2P(OPri)(2)}] 2, were syn thesized through reactions of [NH4](2)[WS4] with [CuS2P(OCH2Ph)(2)] and [NH 4](2)[WOS3] with [AgS2P(OPri)(2)], respectively. Their crystal structures a nd nonlinear optical properties are reported. The X-ray crystallographic st ructure of 1 is an incomplete cubane-like structure. the dithiophosphate li gand adopts a triply bridging role, employing two sulfur atoms to coordinat e to the three Cu atoms: one sulfur atom binds to one Cu atom, another sulf ur atom to two other Cu atoms. The structure of 2 contains a half-open cuba ne-like cluster core, the dithiophosphate ligand acts as a bidentate ligand and the two S atoms of the di-isopropyl dithiophosphato ligand coordinate to two Ag atoms, respectively. Using a Z-scan technique with 532 nm laser r adiation, both the real and imaginary parts of third-order nonlinear suscep tibility of clusters 1 and 2 were determined. (C) 1999 Elsevier Science Ltd . All rights reserved.