Tri- and Tetranuclear Mixed-Metal Clusters Containing Alkyne Ligands: Synthesis and Structure of [Ru3Ir(CO)11 (RCCR)]-, [Ru2Ir(CO)9(RCCR)]-, and [HRu2Ir(CO)9(RCCR)]

tert-Butylhydrazinium azide [tBuNH2NH2]+[N3]- (1) was prepared in a high yield reaction from tert-butylhydrazine and HN3. N,N,N-Trimethylhydrazinium azide [NH2N(CH3)3]+[N3]- (2) was prepared from the reaction of silver azide with N,N,N-trimethylhydraziniumiodide. Both were characterized by X-ray structural analysis, IR, Raman, and multinuclear (1H, 13C, 14N) NMR spectroscopy.