Cyclopentadienyl-ruthenium and -osmium chemistry. Cleavage of tetracyanoethylene under mild conditions: X-ray crystal structures of [Ru{η3-C(CN)2CPhCC(CN)2}(PPh3)(η-C5H5)] and [Ru{C[C(CN)2]CPhC(CN)2}-(CNBut)(PPh3)(η-C5H5)]

Abstract
The reaction between [RU(C2Ph)(PPh3)2(η-C5H5)] and C2(CN)4 affords [Ru{η3-C(CN)2 CPhCC(CN)2}-(PPh3)(η-C5H5)](2), which forms [Ru{C[C(CN)2]- CPhC(CN)2}(L)(PPh3)(η-C5H5)](5) with L = CO or CNBut; the structures of (2) and (5; L = CNBut) have been determined by X-Ray crystallography.

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