Electrochemical and spectroelectrochemical studies of C-benzodiazaborolyl-ortho-carboranes

Weber L, Kahlert J, Böhling L, Brockhinke A, Stammler H-G, Neumann B, Harder RA, Low PJ, Fox MA (2013)
Journal of the Chemical Society. Dalton Transactions 42(6): 2266-2281.

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Abstract
Fifteen C-diazaborolyl-ortho-carboranes, 1-R'-2-R ''-1,2-C2B10H10, where R' represents the groups 2-(1,3-Et-2-1,3,2-N2BC6H4)-, 2-(1,3-Ph-2-1,3,2-N2BC6H4)-, 2-(1,3-Ph-2-5,6-Me-2-1,3,2-N2BC6H2)-, 2-(1,3-Pr-i(2)-1,3,2-N2B-C6H4)-, and 2-(1,3,2-N2BC6H6)-and where R '' is H, Me, Ph, Bu-t 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.
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Weber L, Kahlert J, Böhling L, et al. Electrochemical and spectroelectrochemical studies of C-benzodiazaborolyl-ortho-carboranes. Journal of the Chemical Society. Dalton Transactions. 2013;42(6):2266-2281.
Weber, L., Kahlert, J., Böhling, L., Brockhinke, A., Stammler, H. - G., Neumann, B., Harder, R. A., et al. (2013). Electrochemical and spectroelectrochemical studies of C-benzodiazaborolyl-ortho-carboranes. Journal of the Chemical Society. Dalton Transactions, 42(6), 2266-2281.
Weber, L., Kahlert, J., Böhling, L., Brockhinke, A., Stammler, H. - G., Neumann, B., Harder, R. A., Low, P. J., and Fox, M. A. (2013). Electrochemical and spectroelectrochemical studies of C-benzodiazaborolyl-ortho-carboranes. Journal of the Chemical Society. Dalton Transactions 42, 2266-2281.
Weber, L., et al., 2013. Electrochemical and spectroelectrochemical studies of C-benzodiazaborolyl-ortho-carboranes. Journal of the Chemical Society. Dalton Transactions, 42(6), p 2266-2281.
L. Weber, et al., “Electrochemical and spectroelectrochemical studies of C-benzodiazaborolyl-ortho-carboranes”, Journal of the Chemical Society. Dalton Transactions, vol. 42, 2013, pp. 2266-2281.
Weber, L., Kahlert, J., Böhling, L., Brockhinke, A., Stammler, H.-G., Neumann, B., Harder, R.A., Low, P.J., Fox, M.A.: Electrochemical and spectroelectrochemical studies of C-benzodiazaborolyl-ortho-carboranes. Journal of the Chemical Society. Dalton Transactions. 42, 2266-2281 (2013).
Weber, Lothar, Kahlert, Jan, Böhling, Lena, Brockhinke, Andreas, Stammler, Hans-Georg, Neumann, Beate, Harder, Rachel A., Low, Paul J., and Fox, Mark A. “Electrochemical and spectroelectrochemical studies of C-benzodiazaborolyl-ortho-carboranes”. Journal of the Chemical Society. Dalton Transactions 42.6 (2013): 2266-2281.
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