Trajectory-surface-hopping study of the Renner-Teller effect in the N(2D) + H2 reaction

Fabrizio Santoro, Carlo Petrongolo, George C Schatz

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

We present a semiclassical study of the rovibronic Renner-Teller (RT) effect on the reaction N(2D) + H2(X1+g) → NH2(X2A″ + A2A′) → NH(X3Σ- + a1δ) + H(2S). A new approach for describing RT coupling within the framework of trajectory surface hopping is developed for this application. The calculations include the two lowest-lying electronic states of NH2 as derived from ab initio calculations together with a semiclassical description of the RT coupling. We investigated the role of the RT effect on the integral and differential reactive cross sections for formation of both NH electronic states and on the product distribution by varying the collision energy and the initial rotational state of H2. Our results show that the RT coupling does not affect the reactivity of trajectories starting on the X2A″ potential but considerably affects those starting on A2A′, leading to an almost exclusive formation of NH(X3Σ-) at collision energies below 5 kcal/mol and a maximum contribution of ∼10% to the overall formation of NH(X3Σ-) for collision energies between 5 and 10 kcal/mol. The dependence of the RT effect on the collision energy and on the rovibrational state of H2 has also been analyzed, and a simple classical interpretation of most of these features based on the time spent by trajectories in the region where the RT coupling is active is proposed. Our results predict that the RT effect is not important to the thermal rate constant but has measurable consequences for certain state-resolved experiments.

Original languageEnglish
Pages (from-to)8276-8284
Number of pages9
JournalJournal of Physical Chemistry A
Volume106
Issue number36
DOIs
Publication statusPublished - Sep 12 2002

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Trajectories
trajectories
Electronic states
collisions
Rate constants
energy
rotational states
electronics
reactivity
Experiments
cross sections
products
Hot Temperature

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Trajectory-surface-hopping study of the Renner-Teller effect in the N(2D) + H2 reaction. / Santoro, Fabrizio; Petrongolo, Carlo; Schatz, George C.

In: Journal of Physical Chemistry A, Vol. 106, No. 36, 12.09.2002, p. 8276-8284.

Research output: Contribution to journalArticle

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