Picture of flying drone

Award-winning sensor signal processing research at Strathclyde...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including by Strathclyde researchers involved in award-winning research into technology for detecting drones. - but also other internationally significant research from within the Department of Electronic & Electrical Engineering.

Strathprints also exposes world leading research from the Faculties of Science, Engineering, Humanities & Social Sciences, and from the Strathclyde Business School.

Discover more...

Synthesis and crystal structure of the mixed lithium sodium guanidide [Li4Na2{NC(NMe2)2}6]: A stack of three (metal-nitrogen)2 dimeric rings with additional intramolecular (tertiary amine) nitrogen-lithium coordinations

Barnett, N.D.R. and Mulvey, Robert and Clegg, William and O'Neil, Paul A. (1992) Synthesis and crystal structure of the mixed lithium sodium guanidide [Li4Na2{NC(NMe2)2}6]: A stack of three (metal-nitrogen)2 dimeric rings with additional intramolecular (tertiary amine) nitrogen-lithium coordinations. Polyhedron, 11 (21). pp. 2809-2812. ISSN 0277-5387

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

Abstract

The tetralithium disodium guanidide [Li4Na2{N=C(NMe2)2}6], crystallized from a 1 : 1 : 2 Bu(n)Li : Bu(n)Na : HN=C(NMe2)2 mixture, has been studied by X-ray crystallography and found to be related to the ketimide [Li4Na2{N=C(Ph)But}6], reported earlier as having a stacked-core of three (metal-nitrogen)2 ring dimers with Li+ and Na+ cations in end rings and the central ring, respectively. However, it also displays a unique feature: intramolecular donor-acceptor interactions which connect dimethylaminonitrogen atoms project from the central ring to Li+ cations in the end rings. Although these interactions are long range (average length 2.304 angstrom, cf. 2.139 angstrom for Li-N core bonds), they still significantly influence the core bonding as evidenced by an analysis of bond lengths and bond angles.