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Russian Chemical Bulletin

, Volume 47, Issue 8, pp 1454–1459 | Cite as

Kinetics of alkaline hydrolysis of esters of phosphorus acids in micellar and hexagonal phases in the cetyldimethylethylammonium bromide—NaOH—water system

  • R. F. Bakeeva
  • L. A. Kudryavtseva
  • G. Eme
  • E. M. Kosacheva
  • V. E. Bel'skii
  • D. B. Kudryavtsev
  • R. R. Shagidullin
  • V. F. Sopin
Physical Chemistry

Abstract

The influence of micellar (Mi) and hexagonal (E) mesophases of the cetyldimethylethylammonium bromide—NaOH—water system (I) on the rates on alkaline hydrolysis ofO-p-nitrophenyl-O,O-diethyl phosphate (2),O-p-nitrophenyl-O-ethylethyl phosphonate (3), andO,O-di(p-nitrophenyl)methyl phosphonate (4) was studied by UV spectrophotometry. The binding constants of the substrates, critical micelle concentrations, and rate constants of reactions in the micellar phase were determined. In micellar solutions of systemI, a tenfold increase in the rates of alkaline hydrolysis of2–4 was observed. An increase in the degree of medium ordering during the formation of the E-phase results in a twofold acceleration of alkaline hydrolysis of2 and3 and in the inhibition of this process in the case of4.

Key words

micellar catalysis esters of acids of tetracoordinated phosphorus lyomesophases kinetics 

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Copyright information

© Plenum Publishing Corporation 1998

Authors and Affiliations

  • R. F. Bakeeva
    • 1
  • L. A. Kudryavtseva
    • 1
  • G. Eme
    • 1
  • E. M. Kosacheva
    • 1
  • V. E. Bel'skii
    • 1
  • D. B. Kudryavtsev
    • 1
  • R. R. Shagidullin
    • 1
  • V. F. Sopin
    • 1
  1. 1.A. E. Arbuzov Institute of Organic and Physical ChemistryKazan' Research Center of the Russian Academy of SciencesKazan'Russian Federation

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