A new class of linked-bis(N,N′-dialkylamidinate) ligand: Applications in the synthesis of bimetallic aluminium complexes

Grundy, Joanna, Coles, Martyn P. and Hitchcock, Peter B. (2002) A new class of linked-bis(N,N′-dialkylamidinate) ligand: Applications in the synthesis of bimetallic aluminium complexes. Journal of Organometallic Chemistry, 662 (1-2), 178-187. (doi:10.1016/S0022-328X(02)01922-8).

Abstract

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 Nalkyl 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 revealed a monomeric complex with a perpendicular arrangement of the amidinate units with respect to the C₆-group.

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Contributors

Author: Joanna Grundy

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