Highly hindered γ-PIII-functionalised alkoxo-lithium complexes: Syntheses and structures of [Li(μ-OCBUt 2CH2PR2)]2 (R = Me or Ph) and [Li(μ-OCBut2CH2PPh2) 2Li(OCBut2)]

Lutz M. Engelhardt, Jack Mac B. Harrowfield, Michael F. Lappert, Iain A. MacKinnon, Burns H. Newton, Colin L. Raston, Brian W. Skelton, Allan H. White

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37 Citations (Scopus)


Reaction of Li(CH2PR2)(tmeda) (R = Me or Ph; tmeda = N,N,N′,N′-tetramethylethylenediamine) with di-t-butyl ketone yields [Li(μ-OCBUt2CH2PR2)]2 [R = Me, (1)] or [Li(μ-OCBut2CH2PPh 2)2Li(OCBut2)], (3); compound (2), the diphenyl analogue of (1), is accessible either by reaction of (3) and further Li(CH2PPh2)(tmeda) or by lithiation of Ph 2PCH2C(OH)But2: the γ-P-functionalised lithium alkoxides (1) - (3) are shown by X-ray crystallography to have Li-P bonds and very short Li-O and Li ··· Li contacts, and compound (3) is structurally similar to the adduct proposed as an intermediate in the important carbanionic alkylation of a ketone.

Original languageEnglish
Pages (from-to)846-848
Number of pages3
JournalJournal of the Chemical Society, Chemical Communications
Issue number11
Publication statusPublished - 1986
Externally publishedYes


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