N-HETEROCYCLIC CARBENES AS LIGANDS IN HIGH-VALENT MOLYBDENUM AND TUNGSTEN COMPLEXES

摘要

Oxometal complexes of molybdenum and tungsten in high oxidation states form stable adducts with 1,3-dimethylimidazoline-2-ylidene(L) 1. The first 'carbene' complexes of molybdenum(VI) [MoO2Cl(L)(3)]Cl (3a) and tungsten(VI) WO2Cl2(L)(2) (4b) are reported. [References: 30]