Issue 24, 2006
From the journal:

Dalton Transactions

Synthesis and structures of some heterometallic [(Li, Y)2, (M3, Ce) (M = Li or Na), (Li, Zr2) and (Li, Zr)4] oligomeric diamides derived from 1,2-bis(neopentylamino)benzene†

Peter B. Hitchcock,a   Qigu Huang,a   Michael F. Lappert,*a   Xue-Hong Weia  and  Meisu Zhoua  

* Corresponding authors

a Department of Chemistry, University of Sussex, Brighton, UK
E-mail: m.f.lappert@sussex.ac.uk

Abstract

The following crystalline, X-ray-characterised heterometallic oligomeric diamides have been prepared in good yield under mild conditions in diethyl ether from the dilithio or disodio derivative of the N,N′-dineopentyl-1,2-diaminobenzene [{N(H)(CH2But)}2C6H4-1,2] (abbreviated as H2L): [Y(L)(μ-Cl)2Li(OEt2)2]2 (1), [Li(OEt2)2Li(μ2-Cl)4(μ3-Cl)2{Zr(L)}2]2 (2), [Zr(L)2(μ-Cl){Li(OEt2)2}(μ2-Cl)2Zr(L)] (3), [Ce{(μ-L)M}3(OEt2)1/2] (3M = Li1.82Na1.18) (4), [Ce{(μ-L)Na}3(OEt2)] (5) and [Ce{(μ-L)Na}3] (6). Compounds 1–3 were obtained from Li2(L) and YCl3 (the colourless 1) or ZrCl4 (the red 2 and 3), while the red 4 and 5 were isolated from CeCl3 and M2(L) (3M = Li1.82Na1.18) (4) or Na2(L) (5). Attempted oxidation of 5 with Br2 in hexane yielded the black 6. The ligand L is N,N′-chelating to each of the d- or f-block metals in 1–6; and in 4–6L is also acting as a bridge between Ce and the alkali metal, to which L is thus also chelating.

Graphical abstract: Synthesis and structures of some heterometallic [(Li, Y)2, (M3, Ce) (M = Li or Na), (Li, Zr2) and (Li, Zr)4] oligomeric diamides derived from 1,2-bis(neopentylamino)benzene

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Article information

DOI
https://doi.org/10.1039/B515790K
Article type
Paper
Submitted
08 Nov 2005
Accepted
20 Feb 2006
First published
16 Mar 2006

Dalton Trans., 2006, 2991-2997

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Synthesis and structures of some heterometallic [(Li, Y)2, (M3, Ce) (M = Li or Na), (Li, Zr2) and (Li, Zr)4] oligomeric diamides derived from 1,2-bis(neopentylamino)benzene

P. B. Hitchcock, Q. Huang, M. F. Lappert, X. Wei and M. Zhou, Dalton Trans., 2006, 2991 DOI: 10.1039/B515790K

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