Conclusions
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1.
The data of a detailed x-ray-diffraction study of 1-trimethylsilyl- and trimethyl-germyl-o-carboranes show that the Si-C and Ge-C bonds between the carborane ring and the substituent are larger than the bonds in the substituent itself, and CH3 groups have a screened orientation with respect to the unsubstituted C-atom of the o-carborane skeleton.
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2.
The electron-deficient carborane ring appreciably influences the geometrical parameters of the bond of the polyhedron C atom with substituents.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 3, pp. 600–604, March, 1981.
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Kirillova, N.I., Klimova, T.V., Struchkov, Y.T. et al. X-ray diffraction study of C-monosubstituted derivatives of o-carborane with trimethylsilyl and trimethylgermyl substituents. Russ Chem Bull 30, 442–446 (1981). https://doi.org/10.1007/BF00949592
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DOI: https://doi.org/10.1007/BF00949592