Spin-orbit corrected potential energy surface features for the I ((2)P(3/2)) + H2O â HI + OH forward and reverse reactions.
Phys Chem Chem Phys
; 16(6): 2641-6, 2014 Feb 14.
Article
em En
| MEDLINE
| ID: mdl-24382520
ABSTRACT
Using the CCSD(T) method with relativistic correlation consistent basis sets up to cc-pVQZ-PP, the entrance complex, transition state, and exit complex for the endothermic reaction I + H2O â HI + OH have been studied. The vibrational frequencies and the zero-point vibrational energies of the five stationary points for the title reaction are reported and compared with the limited available experimental results. Opposite to the valence isoelectronic F + H2O system, but similar to the Cl + H2O and Br + H2O reactions, the I + H2O reaction is endothermic, in this case by 46 kcal mol(-1). After the zero-point vibrational energy and spin-orbit coupling corrections, the endothermic reaction energy is predicted to be 48 kcal mol(-1), which agrees well with experimental values. For the reverse reaction HI + OH â I + H2O the transition state lies below the reactants, consistent with the experimental negative temperature dependence for the rate constants.
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1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Água
/
Iodo
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
Phys Chem Chem Phys
Assunto da revista:
BIOFISICA
/
QUIMICA
Ano de publicação:
2014
Tipo de documento:
Article