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Intensity of bands of the C≡C stretching modes in the IR spectra and conjugation in silylacetylenes

  • Physical Chemistry
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Russian Chemical Bulletin Aims and scope

Abstract

A comparative study of the integrated extinction coefficients (A) of the C≡C stretching bands in the IR spectra of acetylene derivatives Me3SiC≡CR, HC≡CR, and Me3CC≡CR was carried out. The resonance interactions of substituents with a triple bond are the main cause of the changes in the values ofA. The total resonance effect of the Me3Si fragment involves both acceptor (d, π-conjugation) and donor (σ, π-conjugation) components; d, π-conjugation dominates in the silylacetylenes studied. Theσ 0R resonance constant of the Me3Si substituent in compounds Me3SiC≡CR is 0.17±0.02.

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Authors and Affiliations

  1. G. A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, 49 ul. Tropinina, 603600, Nizhnii Novgorod, Russian Federation

    A. N. Egorochkin, S. E. Skobeleva & T. G. Mushtina

  2. Saint Petersburg State Technological Institute, 49 Zagorodnyi proezd, 198013, St. Petersburg, Russian Federation

    E. T. Bogoradovsky

Authors
  1. A. N. Egorochkin
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  2. S. E. Skobeleva
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  3. T. G. Mushtina
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  4. E. T. Bogoradovsky
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Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 1, pp. 76–80. January 1997.

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Egorochkin, A.N., Skobeleva, S.E., Mushtina, T.G. et al. Intensity of bands of the C≡C stretching modes in the IR spectra and conjugation in silylacetylenes. Russ Chem Bull 46, 71–75 (1997). https://doi.org/10.1007/BF02495350

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  • DOI: https://doi.org/10.1007/BF02495350

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