Picture of a sphere with binary code

Making Strathclyde research discoverable to the world...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs. It exposes Strathclyde's world leading Open Access research to many of the world's leading resource discovery tools, and from there onto the screens of researchers around the world.

Explore Strathclyde Open Access research content

A new approach to lithium-heavier alkali metal interchange reactions: synthesis of a tetralithium pentasodium mixed alkoxide-amide dome-shaped cage compound with an encapsulated hydroxide molecule

Kennedy, A.R. and MacLellan, J.G. and Mulvey, R.E. and Robertson, A. (2000) A new approach to lithium-heavier alkali metal interchange reactions: synthesis of a tetralithium pentasodium mixed alkoxide-amide dome-shaped cage compound with an encapsulated hydroxide molecule. Journal of the Chemical Society, Dalton Transactions, 2000 (22). pp. 4112-4116. ISSN 0300-9246

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

An investigation of metal-metal interchange reactions between alkali metal amides and alkali metal alkoxides, relevant to the area of superbases, has uncovered a novel adduct containing both components, which has been isolated from solution and crystallographically characterised. Formulated as [Li4Na4(ButO)4{PhN(H)}4(NaOH)(4-Me-py)4], this tetralithium pentasodium mixed alkoxide-amide can be synthesized either by reaction of lithium anilide with sodium t-butoxide or of sodium anilide with lithium t-butoxide, in the presence of the co-ordinating solvent 4-methylpyridine (4-Me-py). The single sodium hydroxide molecule in the formulation occurs adventitiously, but consistently. X-Ray crystallographic studies reveal a 17-vertex dome-shaped structure founded on a (NaN)4 basal ring, above which lies a smaller (LiO)4 ring then an apical Na atom: the OH- ion occupies an internal position within the dome. Discussion focuses on the striking resemblance between this structure and that of the previously reported tetralithium pentapotassium mixed alkoxide-enolate [Li4K4(ButO)4(C6H11O)4(KOH)(THF)5], and it is pointed out that the dominant factor in their common architectural design appears to be the encapsulated hydroxide molecule.