Picture of wind turbine against blue sky

Open Access research with a real impact...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs.

The Energy Systems Research Unit (ESRU) within Strathclyde's Department of Mechanical and Aerospace Engineering is producing Open Access research that can help society deploy and optimise renewable energy systems, such as wind turbine technology.

Explore wind turbine research in Strathprints

Explore all of Strathclyde's Open Access research content

The changing structural chemistry of lithium anilide on solvation by pyridine, 4-methylpyridine or 4-tert-butylpyridine

Clegg, W and Horsburgh, L and Liddle, S T and Mackenzie, F M and Mulvey, Robert and Robertson, A (2000) The changing structural chemistry of lithium anilide on solvation by pyridine, 4-methylpyridine or 4-tert-butylpyridine. Journal of the Chemical Society, Dalton Transactions, 7. pp. 1225-1231. ISSN 0300-9246

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

Abstract

A family of crystalline lithium anilide solvates, [{PhN(H)Li .(pyr)(2)}(2)] 1, [{PhN(H)Li .(4-Me-pyr)(2)}(2)] 2 and [{PhN(H)Li}(4).(4-Bu-t-pyr)(6)] 3 has been synthesised by reacting the aromatic primary amide with two molar equivalents of the appropriate pyridine-based solvent (pyridine, 4-methylpyridine and 4-tert-butylpyridine, respectively) in hexane-toluene solution. X-Ray crystallographic studies have revealed three contrasting structures: 1 adopts a dinuclear, dimeric [(anilido)N-Li](2) ring arrangement with a transoid (anti) conformation of amido substituents; 2 adopts a similar arrangement but with a cisoid (syn) conformation of amido substituents; and 3 adopts a novel tetranuclear arrangement with a central [(anilido)N-Li](2) transoid ring, separating two mixed ligand [(anilido)N-Li-(pyr)N-Li] rings, made possible by the unusual mu-bonding of a 4-tert-butylpyridine ligand. A combination of H-1, Li-7 and C-13 NMR spectroscopic studies at 300 K suggests similar environments exist for corresponding atoms in [H-2(8)]-toluene solutions of 1, 2 or 3. Further examination of the solution of 3 over the temperature window (300-193 K) has detected a fluxional structure involving the intramolecular exchange of two distinct types of anilido ligand, consistent with those present in the molecular structure of crystalline 3.