A New Method for Introducing Tin Ligands into Tetrairidium Dodecacarbonyl
摘要:
The reaction of Ph3SnOH with Ir-4(CO)(12) in the presence of[Bu4N]OH in methanol solvent gave two products, [Bu4N][Ir-4(CO)(11)(StiPh(3))] (I; 45% yield) and [Bu4N][Ir-4(CO)(10)(SnPh3)(2)(mu-H)] (2; 5.5% yield), and the reaction of Ir-4(CO)(11)(PPh3) with Ph3SnOH in the presence of[Bu4N]OH gave the complex Ir-4(CO)(10)(SnPh3)(PPh3)(mu-H) (3) in 44% yield. It is proposed that the reactions occur by the addition of the anion [OSnPh3](-) generated in situ to a CO ligand of the Ir-4(CO)(12) to form a stannyl-substituted metallocarboxylate ligand that subsequently loses CO2 and transfers the SnPh3 group to a metal atom.