Journal
JOURNAL OF PHYSICAL CHEMISTRY A
Volume 105, Issue 11, Pages 2414-2422Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp0036238
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The dynamics of the prototypical insertion reaction N(D-2) + D-2 have been investigated in a combined experimental and theoretical study. Angular and velocity distributions of the ND product have been obtained in crossed molecular beam experiments with mass spectrometric detection at two collision energies (E-c = 3.8 and 5.1 kcal mol(-1)). The center-of-mass product angular and translational energy distributions have been derived; at both E-c's, the former is found to be nearly backward-forward symmetric, reflecting an insertion dynamics, and the latter corresponds to a fraction of total available energy released in translation of 32%, indicating that the ND product is highly internally excited. Quasiclassical trajectory (QCT) calculations were performed on an accurate potential-energy surface obtained from lame-scale ab initio electronic structure computations, and the results were compared to experiment. Generally good agreement was found between the experimental results and the theoretical predictions; however, small, yet significant, discrepancies point to some inaccuracy of the QCT treatment, calling for a quantum scattering study of the title reaction.
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