Abstract

We employ the semirigid vibrating rotor target (SVRT) model to studythe influence of rotational and vibrational excitation of the reagenton reactivity for the reaction H+NH3. The excitation of thepseudo H–NH2 stretching vibration of the SVRT model givessignificant enhancement of reaction probability. Detailed study of theinfluence of initial rotational states on reaction probability showsstrong steric effect. The steric effect of polyatomic reactions,treated by the SVRT model, is more complex and richer than theoreticalcalculations involving linear molecular models.

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