Cu(I)-mediated regioselective tri-addition of grignard reagent to [70] fullerene.Synthesis of indenyl-type metalligand embedded into graphitic structure

摘要

A variety of [70]fullerene derivatives bearing three organic groups C_(70)R_3H(1,R=aryl,methyl) have been synthesized in 90-99% isolated yield by the reaction of [70]fullerene with a Grignard reagent in the presence of CuBr·S(CH_3)_2.Deprotonation of C_(70)R_3H with a metal alkoxide gave the corresponding metal complex M(eta~5-C_(70)R_3)[M=K(2),Tl(3),Tl(3)].X-ray crystallographic analysis as well as theoretical study revealed the nature of the 68pi-electronligand,C_(70)R_3~-.