P–H-functionalized ylide–carbene complexes: synthesis of [(CO)5MC(OEt)CHP(NPri2)2H](M = Cr, W) and structure of the chromium derivative
Abstract
[(CO)5MC(OEt)CH2Li]1a,b(M: a, Cr; b, W) react with CIP(NPri2)22 to yield the P–H-functionalized ylide–carbene complexes 4a,bvia transiently formed [α-(phosphino)alkyl]carbene complexes 3a,b; compounds 4a,b are characterized by NMR spectroscopy (13C, 31P) and complex 4a by single crystal X-ray diffraction.