Highly hindered γ-PIII-functionalised alkoxo–lithium complexes: syntheses and structures of [Li(µ-OCBut2CH2PR2)]2(R = Me or Ph) and [Li(µ-OCBut2CH2PPh2)2Li(OCBut2)]
- 1 January 1986
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Chemical Communications
- No. 11,p. 846-848
- https://doi.org/10.1039/c39860000846
Abstract
Reaction of Li(CH2PR2)(tmeda)(R = Me or Ph; tmeda =N,N,N′,N′-tetramethylethylenediamine) with di-t-butyl ketone yields [[graphic omitted]R2)]2[R = Me, (1)] or [[graphic omitted]i(OCBut 2)], (3); compound (2), the diphenyl analogue of (1), is accessible either by reaction of (3) and further Li(CH2PPh2)(tmeda) or by lithiation of Ph2PCH2C(OH)But 2: 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.Keywords
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