Investigation of the vibration spectra of some carbonyl-containing siliconacetylenes

Summary

• 1. The IR spectra of a series of carbonyl-containing siliconacetylenes of different structure were investigated and the intensities of the C ≡C bond were measured in the Raman spectra. The position of the absorption band of the carbonyl group is influenced by conjugation with the triple bond, by the trimethylsilyl group in the presence of a C ≡C bond and by the electronic nature of the R group in

  

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• 2. The different nature of R shows no influence on the position of theυ _C≡C (υ=2150 cm⁻¹) but alters its integral intensity in the Raman spectra.