Quadrupole Coupling and Bond Character in the Vinyl Halides

1 January 1956

journal article
Published by AIP Publishing in The Journal of Chemical Physics

Vol. 24 (1) , 106-109
https://doi.org/10.1063/1.1700808

Abstract

Quadrupole coupling data obtained from microwave spectroscopy are utilized in assessing double‐bond character in planar molecules such as the vinyl halides. The approximations involved and the effect of structural uncertainties have been considered in detail. An uncertainty of 20% or less is estimated for the calculated values of δ, the number of halogen p_y electrons lost as a result of double bonding. Application of the method to vinyl chloride and vinyl iodide yields δ values of 0.06 and 0.03, respectively. A revised value of −72 Mc for (eQq)_bond in vinyl chloride is reported. The present results are compared with conclusions based on other molecular properties.

Keywords

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