Far-Infrared Spectrum and Ring-Puckering Potential of Silacyclopent-2-ene
- 1 January 1970
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 52 (1), 358-360
- https://doi.org/10.1063/1.1672691
Abstract
The far‐infrared spectrum of silacyclopent‐2‐ene, has been recorded, and a series of weak absroption peaks was observed between 120 and 200 cm−1. The absorptions arise from the ring‐puckering vibration, and the frequencies fit well with the potential , where is the puckering coordinate in reduced form. In terms of the dimensioned coordinate , the potential becomes . The coefficients of the terms in the potential function are unexpectedly large and show that silacyclopent‐2‐ene is planar and unusually rigid in that position. Interaction between the silicon orbitals and the carbon–carbon bond most likely accounts for the observed results.
Keywords
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