The reaction of LiAlH4 with 1,4-di-tert-butyl-1,4-diazabutadiene: Imine-containing aluminum hydrides stabilized by lithium coordination

Michael G. Gardiner, Stacey M. Lawrence, Colin L. Raston

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)

Abstract

The reaction of 1,4-di-tert-butyl-1,4-diazabutadiene, 1, with purified LiAlH4 (free from Al metal) in diethyl ether has been investigated in detail, and a range of products have been isolated. The lithium diamidoaluminum dihydride [Li{N(t-Bu)CHCH2N-t-Bu}2AlH2], 2, the dimeric diamidoaluminum hydride [cis-{[μ-N(t-Bu)CH2CH2N-t-Bu]-AlH}2], 3, or the heteroleptic lithium tetraamidoaluminum species [(Et2O)Li{N(t-Bu)CH2}2(CHN-t-Bu) 2Al], 4, can be selectively obtained depending on the order of addition or stoichiometry of the reactants. We have rationalized these results in terms of the unstable adducts which are likely to be present in solution at low temperature. The X-ray crystal structures of 2 and the dimeric lithium aluminum hydride adduct [{[HN(t-Bu)CH(t-Bu)CHN-t-Bu]-Li(μ-H)2AlH2} 2], 7, are described.

Original languageEnglish
Pages (from-to)4467-4472
Number of pages6
JournalInorganic Chemistry
Volume38
Issue number20
DOIs
Publication statusPublished - 1 Dec 1999
Externally publishedYes

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