Crystalline alkyl-lithiums from α-trimethylsilyl-substituted o-xylenes; x-ray crystal structure of [{o-C6H4(CHSiMe 3)2}{Li(tmeda)}2] (tmeda = Me 2NCH2CH2NMe2)

Michael F. Lappert, Colin L. Raston, Brian W. Skelton, Allan H. White

Research output: Contribution to journalArticle

Abstract

Reaction of [o-C6H4(CHRR′)(CHR″R‴) ] (R, R′, R″, R‴ = H or SiMe3) with LiBu n in n-hexane in the presence of Me2NCH2CH 2NMe2 (tmeda) or MeN(CH2CH2NMe 2)2 (pmdeta) results in selective lithiation of the α-carbon in a manner dependent on the nature of the associated substituents and the tertiary amine to afford novel crystalline lithium alkyls; a single-crystal X-ray structure determination of [{o-C6H 4(CHSiMe3)2}{Li(tmeda)}2] shows each lithium to interact with both the α- and adjacent ring carbon atoms from opposite sides of the o-xylidene plane.

Original languageEnglish
Pages (from-to)14-15
Number of pages2
JournalJournal of the Chemical Society, Chemical Communications
Issue number1
DOIs
Publication statusPublished - 1 Jan 1982
Externally publishedYes

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