Main Group Complexes Incorporating 1,3-bis(furyl)-1,1,3,3-tetramethyldisilazide Ligands

Evans, Lloyd T J, Coles, Martyn P, Cloke, F Geoffrey N and Hitchcock, Peter B (2007) Main Group Complexes Incorporating 1,3-bis(furyl)-1,1,3,3-tetramethyldisilazide Ligands. Journal of Organometallic Chemistry, 692 (12). pp. 2548-2553. ISSN 0022328X

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The lithium salt of the bis-furyl substituted disilazide anion, Li{i} [{i} = N(SiMe2R)2 where R = 2-methylfuryl] has been examined as a ligand transfer reagent for the synthesis of group 2 (magnesium) and group 13 (aluminium) compounds. Salt metathesis between Li{i} and AlMe2Cl afforded the expected dimethyl species, Al{i}Me2 (1), which was isolated as a colourless oil. In contrast the corresponding aluminium dichloride, synthesized from Li{i} and AlCl3, gave crystalline products as both the THF adduct Al{i}Cl2(THF) (2a) and the base-free derivative, Al{i}Cl2 (2b). The homoleptic magnesium bis(amide) Mg{i}2 (3) was also synthesized. X-ray crystallographic analysis of 2a reveals a four-coordinate distorted tetrahedral metal, in which neither of the furyl-substituents interact with the metal. In contrast, the aluminium in the base-free dichloride 2b is five-coordinate, containing the first structurally characterized example in which the amide binds with a 1N,O,O-bonding mode, involving coordination of both furyl-substituents at the N-bound metal.

Item Type: Article
Schools and Departments: School of Life Sciences > Chemistry
Depositing User: Lloyd Trevor John Evans
Date Deposited: 06 Feb 2012 20:49
Last Modified: 28 Mar 2012 13:31
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