Conclusions
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1.
The C13 NMR spectra were obtained for the isomeric diphenylcarboranes, the dianions of these carboranes, 1,2-dimethyl-o-carborane, its dianion, and also the monoanions. The dianions from the o- and m-carborane are identical but the dianion from the p-carborane differs from them. The carbon nuclei of the carborane polyhedron occupy equivalent positions.
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2.
The C13 NMR spectra were obtained for the dianion from 1,2-diphenyl-o-carborane in THF at 0, −30, and −50°. There are no changes in the dianion's structure in this temperature rangs.
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3.
The monoanions, obtained from the isomeric diphenylcarboranes, are identical. The carbon nuclei of the carborane fragment and the phenyl rings in them have a nonequivalent position.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 5, pp. 1036–1041, May, 1976.
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Zakharkin, L.I., Kalinin, V.N., Antonovich, V.A. et al. Study of the mono- and dianions of isomeric diphenylcarboranes by the method of C13 NMR spectroscopy. Russ Chem Bull 25, 1009–1014 (1976). https://doi.org/10.1007/BF00921981
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DOI: https://doi.org/10.1007/BF00921981