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Synthesis, structure, and spatial arrangement of Si-substituted N-(dimethylsilylmethyl)imides
Authors:S A Pogozhikh  Yu E Ovchinnikov  E P Kramarova  Vad V Negrebetskii  A G Shipov  A I Albanov  M G Voronkov  V A Pestunovich  Yu I Baukov
Institution:(1) Novosibirsk State Pedagogical University, Novosibirsk, Russia;(2) Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow, Russia;(3) Russian State Medical University, Moscow, Russia;(4) Favorskii Irkutsk Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, Irkutsk, Russia;(5) St. Petersburg State University, St. Petersburg, Russia
Abstract:The synthesis of N-(chlorodimethylsilylmethyl)succinimide and N-(chlorodimethylsilylmethyl)-glutarimide by the reaction of the corresponding N-trimethylsilylimides with chlorodimethylsilane and by the reaction of unsubstituted imides with a mixture of hexamethyldisilazane with dimethylchloromethylchlorosilane is described. The formation of N-(chlorodimethylsilylmethyl)succinimide is followed by substitution by the silicon atom, which, depending on the reagent ratio, provides N-(dimethylsuccinimidomethyl)succinimide as the major or minor product. 1H, 13C, and 29Si NMR spectroscopy and X-ray diffraction analysis showed that the silicon atom in N-(chlorodimethylsilylmethyl)glutarimide is five-coordinate. By contrast, in N-(chlorodimethylsilylmethyl)succinimide and N-(dimethylsuccinimidomethyl)succinimide, according to NMR and X-ray diffraction data, the silicon atom is four-coordinate. Quantumchemical calculations by the AM1 method show that the molecular conformations of N-(chlorodimethylsilylmethyl)imides containing an intramolecular OrarrSi bond are not energetically most favorable in the gas phase.Translated from Zhurnal Obshchei Khimii, Vol. 74, No. 10, 2004, pp. 1617–1623.Original Russian Text Copyright © 2004 by Pogozhikh, Ovchinnikov, Kramarova, Negrebetskii, Shipov, Albanov, Voronkov, Pestunovich, Baukov.This revised version was published online in April 2005 with a corrected cover date.
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