A series of new IrBi carbonyl clusters (Ir3(CO)6(GePh3)3(µ3-Bi)(µ3-H)3 (1) , Ir3(CO)6(GePh2)3(µ3-Bi) (2), (Ir3(CO)6(SnPh3)3(µ3-Bi)(µ3-H)3 (3) , Ir3(CO)6(SnPh2)3(µ3-Bi) (4) have being synthesized by adding Ge and Sn ligands on to Ir3(CO)9(µ3-Bi) (5) .Compound 1 and 3 exist as isomers in solution. The isomers rapidly interconvert on NMR time scale by tripodal, trigonal- twist rearrangement mechanisms. The MOs and UV-visible spectra of 2 were calculated and analyzed by ADF DFT computational treatments. Another interesting high nuclear IrBi cluster has being synthesized (Ir5(µ3-Bi2)(µ4-Bi)(CO)10) (6) by the reaction of Ir3(CO)9(µ3-Bi) with Ph3Bi in a hexane reflux. Both (Ir5(µ3-Bi2)(µ4-Bi)(CO)10) and Ir3(CO)9(µ3-Bi) were used to make the first Ir-Bi bimetallic nano particles . These bimetallic nano particles have being tested as catalyst precursors for the direct oxidation of 3-picoline to nicotinonitrile under mild conditions by using acetyl peroxy borate (APB) as the source of oxygen and have shown promising results.

Polynuclear iridium-bismuth carbonyl clusters: Synthesis, chemistry, and applications

249th National Meeting (2015)

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