Journal of Organometallic Chemistry p. 227 - 232 (1995)
Update date:2022-09-26
Topics:
Lemenovskii, D. A.
Nikonov, G. I.
Brusova, G. P.
Kuzmina, L. G.
Stankovie, E.
Putala, M.
The complexes Cp2Nb(H)(η1-NNCPhAr) (Ar <*> Ph (1) or o-C6H4Br (2)) were found to undergo easy substitution of a hydride ligand for a halogen atom by the reaction of 1 with various alkylhalides with high yields of Cp2Nb(X)(η1-NNCPh2) (X <*> Cl (4), Br (5) or I (6), Cp2Nb(Br)(η1-NNC(Ph)-o-C6H4Br) (7) and 5 were found to be formed in a halgen exchange reaction, and also by the thermolysis of 2.Halide diazoalkane niobocene complexes clearly exhibit marked polarity of the metal centre.Nucleophilic substitution of bromine in 5 yielded Cp2Nb(Me)(η1-NNCPh2) (8).The results of X-ray analysis of 7 are provided.Keywords: Niobium
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