M. D. Fryzuk, T. Haddad, S. Rettig
Sep 1, 1992
Citations
0
Influential Citations
26
Citations
Journal
Organometallics
Abstract
The reaction of allylmagnesium chloride with the bis(amido-phosphine) complex YCl[N-(SiMe{sub 2}CH{sub 2}PMe{sub 2}){sub 2}]{sub 2} (1) results in displacement of one of the tridentate ligands rather than simple metathesis of the chloride to generate the new complex [Y({eta}{sup 3}-C{sub 3}H{sub 5})[N-(SiMe{sub 2}CH{sub 2}PMe{sub 2}){sub 2}]]{sub 2}({mu}-Cl){sub 2}. Careful product analysis showed that the identity of the magnesium byproduct was in fact the bis(amide) derivative Mg[N(SiMe{sub 2}CH{sub 2}PMe{sub 2}){sub 2}]{sub 2}; improved procedures utilize the diallylmagnesium compound Mg(C{sub 3}H{sub 5}){sub 2}{center_dot}(dioxane), which obviates the production of MgCl{sub 2}. Attempts to introduce hydrocarbyl groups on the mono(ligand) derivative YCl{sub 2}[N(SiMe{sub 2}CH{sub 2}PMe{sub 2}){sub 2}] by control of stoichiometry have so far failed, with the exception of the formation of the bis(allyl) derivative Y-({eta}{sup 3}-C{sub 3}H{sub 5}){sub 2}[N(SiMe{sub 2}CH{sub 2}PMe{sub 2}){sub 2}] by the reaction with Mg-(C{sub 3}H{sub 5}){sub 2}{center_dot}(dioxane); this bis(allyl) derivative acts as a catalyst precursor for the polymerization of ethylene.