Addition reactions of lithiodimethylphenylsilane to (η4-1,3-diene)-Fe(CO)3 and (η6-arene)Cr(CO)3 complexes

Treatments of (η4-cyclohexa-1,3-diene)Fe(CO)3 complex with 1.2 equivalents of PhMe2SiLi, followed by quenching the reactive intermediate with CF3COOH generated 1-dimethyl(phenyl)silylcyclohex-1-ene and with 2-(phenylsulfonyl)-3-phenyloxaziridine produced [η4-2-dimethyl(phenyl)silylcyclohexa-1,3-diene]Fe(CO)3 complex as the major product. Additions of the silyl anion to (η6-arene)Cr(CO)3 and (η6-cyclohepta-1,3,5-triene)Cr(CO)3 complexes produce dienylsilanes after acid quenching.