Mono(amido-diphosphine) complexes of yttrium: Synthesis and X-ray crystal structure of (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}
- Univ. of British Columbia, Vancouver (Canada)
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.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 554995
- Journal Information:
- Organometallics, Vol. 11, Issue 9; Other Information: PBD: Sep 1992
- Country of Publication:
- United States
- Language:
- English
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