Computer simulation of the routes of conformational isomerization of 1,3,2-dioxathiane and its Soxides by nonempirical quantum-chemical method RHF/6-31G(d) revealed the main and local minima and transition states of this process. It was shown that the barrier of ring inversion is reduced in going from 1,3,2-dioxathiane to its oxides. The established Delta G (0) (300 K) value of S=O group in cyclic sulfite (-15.0 kJ mol(-1)) is in good agreement with the experimental data.
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Ecole Natl Super Chim Montpellier, UMR 5076 CNRS, Chim Organ Lab, F-34296 Montpellier 5, FranceEcole Natl Super Chim Montpellier, UMR 5076 CNRS, Chim Organ Lab, F-34296 Montpellier 5, France
Cristau, HJ
Carteron, M
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Ecole Natl Super Chim Montpellier, UMR 5076 CNRS, Chim Organ Lab, F-34296 Montpellier 5, FranceEcole Natl Super Chim Montpellier, UMR 5076 CNRS, Chim Organ Lab, F-34296 Montpellier 5, France
Carteron, M
Fruchier, A
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Ecole Natl Super Chim Montpellier, UMR 5076 CNRS, Chim Organ Lab, F-34296 Montpellier 5, FranceEcole Natl Super Chim Montpellier, UMR 5076 CNRS, Chim Organ Lab, F-34296 Montpellier 5, France
Fruchier, A
Pirat, JL
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Ecole Natl Super Chim Montpellier, UMR 5076 CNRS, Chim Organ Lab, F-34296 Montpellier 5, FranceEcole Natl Super Chim Montpellier, UMR 5076 CNRS, Chim Organ Lab, F-34296 Montpellier 5, France
Pirat, JL
COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE II FASCICULE C-CHIMIE,
2001,
4
(8-9):
: 711
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715