Inorganic Chemistry, Vol.40, No.26, 6731-6736, 2001
Synthesis and characterization of mixed ruthenium/platinum mu(4)-phosphinidene, phosphorus monoxide, and related clusters
The mixed-metal cluster complexes [Ru-4(CO)(12)Pt(CO)PPh3(mu (4)-PR)] [R = (NPr2)-Pr-i (1), F (3)] were formed by capping the Ru3P face of the nido clusters [Ru-4(CO)(13)(mu (3)-PR)] with the labile Pt(0) reagent [(eta (2)-C2H4)Pt(PPh3)(2)]. The aminophosphinidene complex I undergoes acid hydrolysis to yield the PO complex [Ru-4(CO)(12)Pt(CO)PPh3(mu (4)-PO)][(H2NPr2)-Pr-i] (4). The fluorophosphinidene cluster 3 reacts with ethanol to form the alkoxyphosphinidene complex [Ru-4(CO)(12)Pt(CO)PPh3(mu (4)-POEt)] (5). Comparison of spectroscopic and structural data for clusters 1, 3, 4, and 5 reveals the remarkable effects of the mu4-phosphinidene and phosphorus monoxide ligands on cluster bonding.