Synthesis and characterization of oxomolybdate clusters containing co-ordinatively bound diazenido units. The crystal and molecular structure of the octanuclear oxomolybdate (NHEt3)2(NBu4)2[Mo8O20(NNPh)6]

Abstract

Treatment of α-(NR₄)₄[Mo₈O₂₆] with an excess of phenylhdrazine in ethanol and fractional crystallization yielded a tetranuclear species, [Mo₄O₈(OEt)₂(NNph)₄]^2–, with bridging ethoxy groups, and an octanuclear complex, [Mo₈O₂₀(NNPh)₆]^4–, structurally related to the α-[Mo₈O₂₆]^4– precursor, as determined by X-ray crystallography; the structure of the Mo₈ precursor is reported.