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Steric structure of phosphorus-containing heterocycles. Communication 37. 2-Phenoxy-5,6-benz-1,3,2-dioxaphosphepines with tetracoordinated phosphorus atom

  • B. A. Arbuzov
  • R. A. Kadyrov
  • R. P. Arshinova
  • V. V. Klochkov
  • A. V. Aganov
Physical Chemistry

Conclusions

  1. 1.

    2-Phenoxy-2-oxo(thiono, seleno)-5,6-benz-1,3,2-dioxaphosphepines in solutions of nonpolar solvents are characterized by an equilibrium of two chair-like forms, which in the case of the sulfide and selenide is shifted in the direction of a conformer with an equatorial orientation of the phenoxyl group; in the oxide, at equilibrium, the proportions of two conformers are approximately the same. In solutions of polar solvents, a three component equilibrium is observed for the oxide, in which the flexible forms as well as the chair-like forms are present.

     
  2. 2.

    In accordance with the dipole moments and Kerr effect data, in all conformations, the compounds studied are characterized by a gauche conformation of the phenyl group in relation to the P=O (P=S, P=Se) bond and by an orthogonal disposition of the benzene ring π-orbitals and the p-unshared electron pair on the exocyclic oxygen atom.

     

Keywords

Selenide Phenyl Group Phosphorus Atom Nonpolar Solvent Kerr Effect 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Publishing Corporation 1986

Authors and Affiliations

  • B. A. Arbuzov
    • 1
  • R. A. Kadyrov
    • 1
  • R. P. Arshinova
    • 1
  • V. V. Klochkov
    • 1
  • A. V. Aganov
    • 1
  1. 1.A. M. Butlerov Chemical InstituteV. I. Ul'yanov-Lenin Kazan' State UniversityUSSR

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