Excited State Dynamics of H2CN Radicals

Publication Information:

Bernard, E.J., B.R. Strazisar and H.F. Davis, “Excited State Dynamics of H2CN Radicals”, Chem. Phys. Lett. , Vol. 313, pp. 461-466, 1999. DOI: 10.1016/S0009-2614(99)01062-3

Year: 1999

The photodissociation of H2CN radicals at 274–288 nm was studied using high-nRydberg H-atom photofragment translational energy spectroscopy. A slight preference for H-atom scattering perpendicular to the laser polarization axis (β=−0.10±0.03) indicates that the near-UV transition corresponds to a “forbidden” Full-size image (<1 K) electronic transition made weakly allowed for excitation to A2 vibronic levels. Of the total excess energy (≈77 kcal/mol), on average approximately 65% appears as HCN internal excitation. Dissociation proceeds via an indirect mechanism likely involving the ground electronic state.

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