Synthesis and crystal structure of a half-open cubane-like cluster [WOS3Cu3I(4-bpy)3]•0.25EtOH (4-bpy=4-tert-butylpyridine)

Reaction of (NH4)(2)[WOS3] with CuI and 4-tert-butylpyridine (4-bpy) in EtOH afforded a tetranuclear neutral cluster [WOS3CU3I(4-bpy)(3)] center dot 0.25EtOH. This compound was characterized by elementary analysis, IR, 'H NMR, TGA, and its crystal structure was determined by X-ray single crystal diffraction. It belongs to monoclinic, space group P2/c with a=2.2209(2) nm, b=1.364 66(11) nm, c=2.4906(2) nm, beta=104.953(2)degrees, V= 7.2929(12) nm(3), Z=4. The title compound may be viewed as having a half-open cubane-like structure in which three [Cu(4-bpy)](+) units are linked by a triply-bridging [WOS3](2-) unit and a doubly-bridging iodine atom. CCDC: 266412.