Issue 11, 2004
From the journal:

Dalton Transactions

Bis(imino)phenoxide complexes of aluminium

Vernon C. Gibson,a   Drew Nienhuis,a   Carl Redshaw,*b   Andrew J. P. Whitea  and  David J. Williamsa  

* Corresponding authors

a Department of Chemistry, Imperial College, South Kensington, London, UK

b Wolfson Materials and Catalysis Centre, School of Chemical Sciences and Pharmacy, The University of East Anglia, Norwich, UK
E-mail: carl.redshaw@uea.ac.uk

Abstract

Reaction of Me3Al (one equivalent) with the bis(imino)phenol, [2,6-(ArNCH)2-4-MeC6H2OH] (I) (Ar = 2,6-Pri2C6H3) in toluene at ambient temperature yields the yellow complex {Me2Al[2,6-(ArNCH)2-4-MeC6H2O]} (1). Interaction of two equivalents of Me3Al in refluxing toluene affords the red complex {(Me2Al)2[2-ArNCH(Me)-6-(ArNCH)-4-MeC6H2O]} (2). Similar interaction (two equivalents, refluxing toluene) of MeAlCl2 or iBu3Al with [2,6-(ArNCH)2-4-MeC6H2OH] affords {ClAl[2,6-(ArNCH)2-4-MeC6H2O]2} (3) or {iBu2Al[2,6-(ArNCH)2-4-MeC6H2O]} (4), respectively. Hydrolysis of 2 readily affords the iminoaminophenol ligand [2-(ArN[double bond, length as m-dash]CH)-6-ArNHCH(Me)-4-MeC6H2OH] (II), which reacts further with Me3Al to afford {Me2Al[2-ArNCH(Me)-6-(ArNCH)-4-MeC6H2O]} (5). An X-ray study on 1 reveals bidentate imino-alkoxide ligation about the distorted aluminium centre, whereas 2 is a binuclear structure with tetrahedral aluminiums ligated by imino-alkoxide and amido-alkoxide ligand fragments, respectively. For 2 and 3 bidentate imino-alkoxide ligation is observed.

Graphical abstract: Bis(imino)phenoxide complexes of aluminium

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Article information

DOI
https://doi.org/10.1039/B403752A
Article type
Paper
Submitted
11 Mar 2004
Accepted
19 Apr 2004
First published
05 May 2004

Dalton Trans., 2004, 1761-1765

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Bis(imino)phenoxide complexes of aluminium

V. C. Gibson, D. Nienhuis, C. Redshaw, A. J. P. White and D. J. Williams, Dalton Trans., 2004, 1761 DOI: 10.1039/B403752A

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