Conformational analysis of organophosphorus compounds by means of IR spectroscopy and dipole moment methods

Some aspects of rotational isomerism about an ordinary P—X bond in compounds ▪ have been discussed on the basis of spectroscopic data. Changes in spectra in the process of phase transition with variation of dielectric permeability of the environment and temperature have been analyzed. A scheme of st...

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Bibliographic Details
Published in:Journal of molecular structure 1973, Vol.19, p.275-287
Main Author: Raevsky, O.A.
Format: Article
Language:English
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Summary:Some aspects of rotational isomerism about an ordinary P—X bond in compounds ▪ have been discussed on the basis of spectroscopic data. Changes in spectra in the process of phase transition with variation of dielectric permeability of the environment and temperature have been analyzed. A scheme of structure identification by the dipole moment method with determination of conformer concentration from IR-spectra has been proposed. Data from IR-spectra, dipole moments and the Kerr effect have been applied to complicated systems. Gauche- and trans-orientated O—C and PO bonds are characteristic of compounds for which X = O. It has been shown that in the case of rotation of a chloromethyl group at the phosphorus atom trans and gauche arrangements of C—Cl and PO (S) are stable. The position of the conformational equilibrium depends on the nature of the substituents. The important role of electrostatic interaction has been established.
ISSN:0022-2860
1872-8014
DOI:10.1016/0022-2860(73)85270-6