An Unsymmetrlcal bis C-C Agostic Heterobimetallic Lithium Yttrium Complex

摘要

Despite their relative scarcity, agostic complexes in which a C-C, rather than a C-H, bond apparently interacts with a main-group or transition metal have been attracting much attention recently. This stems mainly from their involvement in metallacyclobutanes, which are intermediates in alkene metathesis reactions, and also in their ability to model C-C σ-complexes and C-C bond cleavage.