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The hindered inversion of the seven-membered ring inN-(chlorodimethylgermylmethyl)- andN-(chlorodimethylstannylmethyl)hexahydroazepin-2-ones

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Abstract

The stereochemical flexibility ofN-(chlorodimethylgermylmethyl)- andN-(chlorodimethylstannylmethyl)hexahydroazepin-2-ones was studied by dynamic NMR spectroscopy. Protons of the NCH2M and MMe2 groups (M=Ge, Sn) were shown to be anisochronic at low temperatures (<−70°C). The free activation energy of the process resulting in chemical equivalence of the protons indicated was determined. The anisochronicity of signals observed is due to the restricted inversion of the seven-membered cycle.

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Authors and Affiliations

  1. Russian State Medical University, 1 ul. Ostrovityanova, 117869, Moscow, Russian Federation

    Vad V. Negrebetskii & Yu. I. Baukov

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  1. Vad V. Negrebetskii
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  2. Yu. I. Baukov
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Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 11, pp. 2379–2381, November, 1998.

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Negrebetskii, V.V., Baukov, Y.I. The hindered inversion of the seven-membered ring inN-(chlorodimethylgermylmethyl)- andN-(chlorodimethylstannylmethyl)hexahydroazepin-2-ones. Russ Chem Bull 47, 2307–2309 (1998). https://doi.org/10.1007/BF02494304

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