NIOBIUM ORGANOMETALLIC CHEMISTRY. X. SYNTHESIS OF NEW (η2-DISULFIDO) COMPLEXES; COMPARISON OF THEIR REACTIVITY WITH THAT (η2-DIOXO) DERIVATIVES

Article abstract of DOI:10.1016/S0022-328X(00)98577-2

The new compounds 5-C5H5)2(X-X)R> ( with M = Nb : X = S, R = Me, Bu, η¹-C5H5; X = Se, R = Me; with M = Ta : X = S, R = Me) are described.The reactions of 5-C5H5)2(S-S)Me> (A) with some nucleophiles and electrophiles have been studied.A reacts with triphenylphosphine to give the corresponding monosulfido complex.Loss of the S2 ligand and formation of a μ-oxoderivative <5-C5H5)2Me>2O> X2 * 2OH2 (X = I or BF4) occurs upon treatment of A with CH3I or Ph3CBF4. 5-C5H5)2Me I>I, MeSSMe, have also been identified as product from the reactionwith CH3I.Reaction of A with hexafluorobutyne gives an unexpected new compound, the nature of which is discussed.