Abstract
The dipole moments of the Si(OCH2CH2)3N heterocyclic framework were calculated within the framework of an additive scheme by means of data from x-ray diffraction and conformational analysis of silatranes. The direction of the dipole moment of this fragment coincides with the “experimentally” determined value (from nitrogen to silicon), and its magnitude is ∼3 D. The dipole moment of the Si ← N coordinate bond was estimated to be 2.2 D, which corresponds to charge transfer from the nitrogen atom to the silicon atom (to the extent of 0.2 e). These results refute the existing concepts of the exceptionally high polarity of the transannular Si ← N bond in silatranes.
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See [1] for communication XLII.
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1052–1054, August, 1975.
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Pestunovich, V.A., Voronkov, M.G., Sidorkin, V.E. et al. Atranes. Chem Heterocycl Compd 11, 918–920 (1975). https://doi.org/10.1007/BF00470490
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DOI: https://doi.org/10.1007/BF00470490