title: Superloading of tin ligands into rhodium and iridium carbonyl cluster complexes.
abstract: The reactions of Rh4(CO)12 and Ir4(CO)12 with Ph3SnH have yielded the new Rh-Sn and Ir-Sn cluster complexes M3(CO)6(mu-SnPh2)3(SnPh3)3, 1 (M=Rh) and 2 (M=Ir). Both compounds contain triangular M3 clusters with three bridging SnPh2 and three terminal SnPh3 ligands. The M-M bonds are unusually long. Molecular orbital calculations indicate that this is due to the importance of M-Sn bonding and weak direct M-M interactions. Reaction of 1 with Ph3SnH at reflux in 1,2-dichlorobenzene solvent yielded the complex Rh3(CO)3(SnPh3)3(mu-SnPh2)3(mu3-SnPh)2, 3, which contains eight tin ligands: three terminal SnPh3, three edge-bridging SnPh2, and two triply bridging SnPh ligands.
authors.affiliation: Department of Chemistry and Biochemistry and the USC NanoCenter, University of South Carolina, Columbia, South Carolina 29208, USA. adams@mail.chem.sc.edu
authors.forename: Richard D
authors.initials: RD
authors.lastname: Adams
authors.forename: Burjor
authors.initials: B
authors.lastname: Captain
authors.forename: Jack L
authors.initials: JL
authors.lastname: Smith
authors.forename: Michael B
authors.initials: MB
authors.lastname: Hall
authors.forename: Chad L
authors.initials: CL
authors.lastname: Beddie
authors.forename: Charles Edwin
authors.initials: CE
authors.lastname: Webster