Abstract
Reactions of [RuCl 2L 4] (L = PMe 3, PMe 2Ph or PMePh 2) with 2-lithiomethyl-1-methylnaphthalene or 2-lithiomethyl-3-methylnaphthalene lead to [Ru(CH 2C 10H 6CH 2)L 3] which contain coordinated 1,2- or 2,3-naphthoquinodimethane moieties. Spectroscopic studies confirm these formulations and suggest significant localization of the double bonds, at least for the 1,2-naphthoquinodimethane fragment. For L = PMe 3 and 2-lithiomethyl-1-methylnaphthalene formation of the 1,2-naphthoquinodimethane complex is accompanied by the formation of [Ru(CH 2C 10H 6CH 2)(PMe 3) 4] in which the organic moiety acts as a dialkyl, two-electron donor. Surprisingly for L = PMe 2Ph and 2-lithiomethyl-3-methylnaphthalene, the naphthoquinodimethane is not formed but the major product, although not isolated in a pure state, appears to be [Ru(CH 2C 6H 10CH 3)Cl(PMe 2Ph) 3] in which the organic group is coordinated in an η 3 (allyl) mode. Plausible mechanisms, which account for the various products formed in these reactions are presented.
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