Superloading of tin ligands into rhodium and iridium carbonyl cluster complexes.
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.
Adams
Richard D
RD
Department of Chemistry and Biochemistry and the USC NanoCenter, University of South Carolina, Columbia, South Carolina 29208, USA. adams@mail.chem.sc.edu
Captain
Burjor
B
Smith
Jack L
JL
Hall
Michael B
MB
Beddie
Chad L
CL
Webster
Charles Edwin
CE