Aminobis(phenolate)s of imidomolybdenum(VI) and -tungsten(VI)

: Lehtonen A, Balcar H, Sillanpaa R

Publisher: ELSEVIER SCIENCE SA

: 2009

Journal of Organometallic Chemistry

JOURNAL OF ORGANOMETALLIC CHEMISTRY

: J ORGANOMET CHEM

: 694

: 5

: 649

: 654

: 6

: 0022-328X

DOI: https://doi.org/10.1016/j.jorganchem.2008.11.047

The reactions of trans-[MoO(ONOMe)Cl-2] 1 (ONOMe = methylamino-N,N-bis(2-methylene-4,6-dimethylphenolate) dianion) and trans-[MoO(ONOtBu)Cl-2] 2 (ONOtBu = methylamino-N, N-bis(2-methylene-4-methyl-6-tert-butylphenolate) dianion) with PhNCO afforded new imido molybdenum complexes trans-[Mo(NPh)(ONOMe) Cl-2] 3 and trans-[Mo(NPh)(ONOtBu)Cl-2] 4, respectively. As analogous oxotungsten starting materials did not show similar reactivity, corresponding imido tungsten complexes were prepared by the reaction between [W(NPh)Cl-4] with aminobis(phenol)s. These reactions yielded cis- and trans-isomers of dichloro complexes [W(NPh)(ONOMe)Cl-2] 5 and [W(NPh)(ONOtBu)Cl-2] 6, respectively. The molecular structures of 4, cis-6 and trans-6 were verified by X-ray crystallography. Organosubstituted imido tungsten(VI) complex cis-[W(NPh)(ONOtBu)Me-2] 7 was prepared by the transmetallation reaction of 6 (either cis or trans isomer) with methyl magnesium iodide. (C) 2008 Elsevier B.V. All rights reserved.