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Multiple deprotonation of primary aromatic diamines by LiAlH4.


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Authors

Less, Robert J 
Allen, Lucy K 
Steiner, Alexander 
Wright, Dominic S 

Abstract

Reaction of LiAlH4 with 1,2-phenylenediamine (1H4) in THF results in formation of the metallocyclic amido-/imido complex [{Al(1H2)}2{Al(1H)2}2][Li(THF)2]4 (3), while in the presence of various Lewis base ligands 1,8-diaminonaphthalene (2H4) gives the amido-('ate') complexes Al(2H2)2Li(LL') [L = THF, L' = PMDETA (N,N,N',N',N''-pentamethyldiethylenetriamine) (4); L = L' = TMEDA (N,N,N',N'-tetramethylethylenediamine) (5)]. The latter complexes provide evidence of intermediates in the proposed reaction pathway for formation of the cyclic framework of the tetraanion {Al(1H2)}2{Al(1H)2}2 of 3.

Description

Keywords

0303 Macromolecular and Materials Chemistry

Journal Title

Dalton Trans

Conference Name

Journal ISSN

1477-9226
1477-9234

Volume Title

44

Publisher

Royal Society of Chemistry (RSC)
Sponsorship
We thank the EU (ERC Advanced Investigator Grant for D.S.W.), the EU (R.J.L. and L.K.A.). We also thank Dr. J. E. Davies for collecting X-ray data on 3, 4 and 5.