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Issue 24, 1996
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Microwave spectra of monohalogenated allenes. Chloroallene and iodoallene

Abstract

The microwave spectra of chloroallene, ClHC[double bond, length as m-dash]C[double bond, length as m-dash]CH2 and ClDC[double bond, length as m-dash]C[double bond, length as m-dash]CH2(35/37Cl), and iodoallene, IHC[double bond, length as m-dash]C[double bond, length as m-dash]CH2 and IDC[double bond, length as m-dash]C[double bond, length as m-dash]CH2, have been studied from 7 to 40 GHz. A least-squares analysis of the observed a- and b-type transition frequencies gave rotational constants and components of the halogen nuclear quadrupole coupling constant tensor in the principal axes systems. The structural parameters for chloroallene and iodoallene are calculated from the rotational constants. The C—X bond lengths in chloroallene and iodoallene were found to be a little longer than those in chloroethene and iodoethene, respectively, in accordance with a slightly lower π character for the carbon–halogen bonds in the haloallenes than those in the haloethenes.

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Article type: Paper
DOI: 10.1039/FT9969204889
Citation: J. Chem. Soc., Faraday Trans., 1996,92, 4889-4895
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    Microwave spectra of monohalogenated allenes. Chloroallene and iodoallene

    T. Ogata and Y. Niide, J. Chem. Soc., Faraday Trans., 1996, 92, 4889
    DOI: 10.1039/FT9969204889

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