Publication details for Dr Mark A. FoxWeber, L., Kahlert, J., Boehling, L., Brockhinke, A., Stammler, H.-G., Neumann, Beate, Harder, R. A., Low, P. J. & Fox, M. A. (2013). Electrochemical and spectroelectrochemical studies of C-benzodiazaborolyl-ortho-carboranes. Dalton Transactions 42(6): 2266-2281.
- Publication type: Journal Article
- ISSN/ISBN: 1477-9226, 1477-9234
- DOI: 10.1039/c2dt32378h
- Further publication details on publisher web site
- Durham Research Online (DRO) - may include full text
Author(s) from Durham
Fifteen C-diazaborolyl-ortho-carboranes, 1-R′-2-R′′-1,2-C2B10H10, where R′ represents the groups 2-(1,3-Et2-1,3,2-N2BC6H4)-, 2-(1,3-Ph2-1,3,2-N2BC6H4)-, 2-(1,3-Ph2-5,6-Me2-1,3,2-N2BC6H2)-, 2-(1,3-iPr2-1,3,2-N2BC6H4)-, and 2-(1,3,2-N2BC6H6)- and where R′′ is H, Me, Ph, tBu or SiMe3, were synthesized. Cyclic voltammetry studies of the compounds showed irreversible oxidation waves which are caused by the oxidation of the heterocycle. Those C-diazaborolyl-ortho-carboranes with Ph, tBu and SiMe3 substituents at the adjacent C-atom of the cage displayed two one-electron reduction waves reflecting the formation of stable radical monoanions with unusual (2n + 3) skeletal electron counts. The geometries of these anions were determined by combinations of infrared, UV-visible spectroelectrochemical and computational studies. Additionally the structures of seven new C-diazaborolyl-ortho-carboranes and one new 2-bromo-1,3,2-benzodiazaborole were determined by X-ray crystallography and compared with previously obtained structures.