Superloading of tin ligands into rhodium and iridium carbonyl cluster complexes.

摘要: The reactions of Rh4(CO)12 and Ir4(CO)12 with Ph3SnH have yielded the new Rh-Sn Ir-Sn cluster complexes M3(CO)6(mu-SnPh2)3(SnPh3)3, 1 (M=Rh) 2 (M=Ir). Both compounds contain triangular M3 clusters three bridging SnPh2 terminal SnPh3 ligands. M-M bonds are unusually long. Molecular orbital calculations indicate that this is due to importance M-Sn bonding weak direct interactions. Reaction at reflux in 1,2-dichlorobenzene solvent complex Rh3(CO)3(SnPh3)3(mu-SnPh2)3(mu3-SnPh)2, 3, which contains eight tin ligands: SnPh3, edge-bridging SnPh2, two triply SnPh