Abstract
A well-defined, silica-supported molybdenum oxo alkyl species, ( SiO-)(2)Mo(=O)((CH2Bu)-Bu-t)(2), was prepared by the selective grafting of Mo(=O)((CH2Bu)-Bu-t)(3)Cl onto a silica partially dehydroxylated at 200 degrees C using a rigorous surface organometallic chemistry approach. The immobilized bipodal surface species, partly resembling the active species of industrial MoO3/SiO2 olefin metathesis catalysts, exhibited excellent functional group tolerance in conjunction with its high activity in homocoupling, self and ring closing olefin metathesis.