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DOI: 10.1039/A702493B (Paper) Reference Section for: Chem. Commun., 1997, 1563-1564

First identification by EPR spectra of lanthanum(ii) organometallic intermediates (and E½ for La3+ → La2+) in the C–O bond activation of dimethoxyethane

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M. Cristina Cassani, Michael F. Lappert and Franco Laschi

Abstract

The reaction of [La(Cp″)3] with K in dimethoxyethane (dme) at ambient temperature leads to the formation of lanthanocene(III) methoxides via persistent paramagnetic lanthanum(II) intermediates that are characterised by EPR spectroscopy and tentatively assigned to [K(dme)x]- [La(Cp″)3] and [La(Cp″)2(dme)y] [Cp″ = η5-C5H3(SiMe3)2 -1,3]; the cyclic voltammogram of [La(Cp″)3] in thf is also reported, Ered½ = -2.8 V.

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