Abstract

The potential curves for the least-motion dissociation of trans dimeric nitrosomethane in its lowest singlet and triplet states have been investigated by carrying out a special kind of limited CI calculations. The open shell configuration required for an adequate description of the dissociation to two triplet state monomers is shown to have significant influence on the singlet state potential curve. The calculated dissociation energy is 28.0 kcal mol −1 as compared to 16.0 kcal mol −1 obtained experimentally. The single—triplet energy splitting is found to be 0.70 eV. Finally the need for a computationally more sophiticated treatment of the dissociation process is pointed out.

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