(Diazomethyl)silyl-functionalized Fischer-type carbene complexes

Abstract The synthesis of two types of so far unknown title compounds is described. Carbene complexes L n MC(R)OSiR 2 C(N 2 )COOMe [L n M(OC) 5 W ( 3 ), (OC) 5 Cr ( 4 ), (OC) 5 Mo ( 5 ), (MeCp)(OC) 2 Mn ( 6 )] were obtained from the corresponding acyl metalates by electrophilic (diazomethyl)silylation. Similarly, (diazomethyl)silylation of lithiated dicarbonyl(η 5 -methylcyclopentadienyl)(1-ethoxyethylidene)manganese yielded a manganese carbene complex ( 8a ) with CH 2 SiR 2 C(N 2 )COOMe substitution.