η⁶-Corannulene Buckybowl Complexes of Iridium, Including Ring-to-Ring Migration

Abstract

Corannulene (C 20 H 10, 1 ), a curved-surface fragment of buckminsterfullerene (C 60 ), forms an η 6 -coordinated complex with Cp*Ir 2+ . The analogous 1,2,5,6-tetramethylcorannulene ( 2 ) complex, Cp*Ir(η 6 - 2 ) 2+, initially forms three isomers, but migration of the Cp*Ir 2+ unit from a nonmethylated to a methylated ring gives two isomers in the final product.