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A New Class of Linked-bis(N,N'-dialkylamidinate) Ligand: Applications in the Synthesis of Bimetallic Aluminium Complexes

journal contribution
posted on 2023-06-08, 06:17 authored by Joanna Grundy, Martyn P Coles, Peter B Hitchcock
The 1,4-benzenebis(N,N¿-dialkylamidine) compounds, 1,4-C6H4[C{NR}{NHR}]2 (1, R=Cy; 2, R=iPr) were synthesised via addition of a stoichiometric amount of water to the 1,4-benzenebis(amidinate) species, generated from the in situ reaction between 1,4-Li2C6H4 and the appropriate carbodiimide. Alternatively, the neutral silylated derivatives, 1,4-C6H4[C{NR}{N(SiMe3)R}]2 (3, R=Cy; 4, R=iPr) are synthesised by quenching the 1,4-benzenebis(amidinate) with excess Me3SiCl. Structural characterisation of selected examples are reported, showing that the neutral NH compounds are monomeric with a E-syn:E-syn arrangement of the N-alkyl substituents, while in the silylated derivative 4, the E-anti:E-anti form is present in the solid-state. Synthesis of the bimetallic aluminium compounds 1,4-C6H4[C{NiPr}2AlMeX]2 (5, X=Cl; 6, X=Me) was achieved from AlMe2Cl using 2 by either the direct protonolysis of an Al---C bond (5), or the trans-metallation reaction of the in situ generated dilithio-salt (6). Structural characterisation of 6 revealed a monomeric complex with a perpendicular arrangement of the amidinate units with respect to the C6-group.

History

Publication status

  • Published

Journal

Journal of Organometallic Chemistry

ISSN

0022-328X

Publisher

Journal of Organometallic Chemistry

Issue

1-2

Volume

662

Page range

178 - 187

Department affiliated with

  • Chemistry Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2012-02-06

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