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DOI: 10.1039/A806171H (Paper) Reference Section for: J. Chem. Soc., Dalton Trans., 1999, 161-166

Synthesis, characterisation and reactivity of the molybdenum(VI) dimethyl complex [Mo(NR)2Me2] (R = 2,6-Pri2C6H3)

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Vernon C. Gibson, Carl Redshaw, Gary L. P. Walker, Judith A. K. Howard, Vanessa J. Hoy, Jacqueline M. Cole, Lyudmila G. Kuzmina and Dinali S. De Silva

Abstract

The reaction of [Mo(NR)2Cl2(dme)] (R = 2,6-Pri2C6H3, dme = 1,2-dimethoxyethane) with 2 equivalents of methylmagnesium bromide in diethyl ether afforded [Mo(NR)2Me2] 2 as a red crystalline solid in good yield. Treatment of 2 with the donor molecules tetrahydrofuran (thf), pyridine, PMe3, and PMe2Ph gave the five-co-ordinate adducts [Mo(NR)2Me2(L)] (L = PMe3 3, PMe2Ph 4, thf 5 or pyridine 6). Exposure of solutions of 2 to atmospheric dioxygen afforded the orange methoxide-bridged complex [{Mo(NR)2Me(µ-OMe)}2] 7. [{Mo(NBut)2Me(µ-OMe)}n], 8 (n = 1 or 2) was obtained from the reaction of [{Mo(NBut)2Me2}2] 1 with dioxygen. The crystal structures of 2, 4 and 7 have been determined.

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