Cleavage of Hydrazine N−N Bonds by RuMo₃S₄ Cubane-Type Clusters

The mixed-metal cubane-type clusters [(Cp*Mo)3(μ3-S)4RuH2(PR3)][PF6] [Cp* = η5-C5Me5; R = Ph (2), Cy (5)] were effective for the N−N bond cleavage of hydrazine and phenylhydrazine via a disproportionation reaction. The ammonia cluster [(Cp*Mo)3(μ3-S)4Ru(NH3)(PPh3)][PF6] (3) and/or the unprecedented double-cubane-type cluster with bridging nitrogenous ligands [{(Cp*Mo)3(μ3-S)4Ru}2(μ2-NH2)(μ2-NHNH2)][PF6]2 (4) were isolated from the reaction mixtures, and their structures were determined by X-ray diffraction studies.