Conclusions
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1.
In the complexes B10H12L2 the B10H12 fragment behaves as a delocalized electron-deficient acceptor.
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2.
The movement of the valence MO's of the boron atoms in the B10H12 fragment to deeper positions in the case of an NH3 ligand may be caused by an interaction involving the d orbitals of the nitrogen atom. Another explanation for the difference in the ligand-skeleton chemical bonding may be the steric effects associated with the geometry of N(Et)3.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 10, pp. 2248–2254, October, 1985.
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Volkov, V.V., Il'inchik, E.A., Khudorozhko, G.F. et al. Comparative study of B10H12 (NH3)2 and B10H12 (NEt3)2 by the methods of X-ray spectroscopy. Russ Chem Bull 34, 2079–2085 (1985). https://doi.org/10.1007/BF00963238
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DOI: https://doi.org/10.1007/BF00963238