Facile and successive orthometallation in rhenium carbene complex
Abstract
The amidinium (carbene) complexes ReBr(CO)4[C(NHR)(NHPh)]1 react with the secondary amine (Et2NH) to yield the cyclometallated rhenium carbene complexes Re(CO)4[µ2·C(NHR)(NHC6H4)2, which undergoes facile and successive closing and opening of the Re–Co σ6; bond by the elimination and addition of electrophiles in rhenium carbene complexes under very mild conditions to yield the final product Rel(CO)4[C(NHPri)(NHC6H3I2)]5.