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Aminobis(phenolate)s of imidomolybdenum(VI) and -tungsten(VI) |
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| Authors: | Ari Lehtonen Hynek Balcar |
| Institution: | a Department of Chemistry, University of Turku, FIN-20014 Turku, Finland b J. Heyrovský Institute of Physical Chemistry, v.v.i., Academy of Sciences of the Czech Republic, Dolejškova 3, 182 00 Prague 8, Czech Republic c Department of Chemistry, University of Jyväskylä, FIN-40351 Jyväskylä, Finland |
| Abstract: | The reactions of trans-MoO(ONOMe)Cl2] 1 (ONOMe = methylamino-N,N-bis(2-methylene-4,6-dimethylphenolate) dianion) and trans-MoO(ONOtBu)Cl2] 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)Cl2] 3 and trans-Mo(NPh)(ONOtBu)Cl2] 4, respectively. As analogous oxotungsten starting materials did not show similar reactivity, corresponding imido tungsten complexes were prepared by the reaction between W(NPh)Cl4] with aminobis(phenol)s. These reactions yielded cis- and trans-isomers of dichloro complexes W(NPh)(ONOMe)Cl2] 5 and W(NPh)(ONOtBu)Cl2] 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)Me2] 7 was prepared by the transmetallation reaction of 6 (either cis or trans isomer) with methyl magnesium iodide. |
| Keywords: | Tungsten Molybdenum Imido ligand Aryloxide ligand |
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