Synthesis and reactivity of molybdenum imido alkylidene bis-pyrazolide complexes

摘要

Reaction of Li(3,5-R_2-pyrazolide) (R = tBu or Ph, dXpz) with Mo(NAr)(CHCMe_2Ph)(OTf)_2(DME) yields Mo(NAr)(CHCMe _2Ph)(dXpz)_2 in good yield. These complexes react with alcohols or the surface silanols of silica, to yield bis-alkoxy and surface mono-siloxy alkene metathesis catalysts, respectively.