Reactions of Dialkyl Phosphonates with Hexacarbonyl-molybdenum(O) and Hexacarbonyltungsten(O).Structure of Intermediates in the CatalyticPhosphorylation of Alkenes

摘要

Reactions of dialkyl phosphonates with catalytic precursors in the phosphorylation of alkenes and aryl halides,homoligand molybdenum(O) and tungsten(O) carbonyl complexes,were studied by quantum-chemical and spectroscopic (IR and NMR) methods.Schemes were proposed for the transformation of catalytic precursors into active intermediates.Depending on the concentration of dialkyl phsphonate,these intermediates are the corresponding hydrogen phosphite or metal hydride carbonyl metal complexes.