Dynamics of C(3P) + OH(X 2π) reaction on the new global HCO(X2A′) potential energy surface

A precise analytical potential energy surface (PES) of HCO(X(2)A') is fitted from a great quantity of ab initio energy points computed with the multi-reference configuration interaction method and aug-cc-pV(Q/5)Z basis sets. The whole energy points extrapolated to the complete basis set limit are fitted by the many-body expansion formula. The calculated topographic characteristics are analyzed and compared with the existing work to prove the precision of the present HCO(X(2)A') PES. By utilizing the time-dependent wave packet and quasi-classical trajectory methods, the reaction probabilities, integral cross sections, and rate constants are computed. The results are compared in detail with the former results carried out on the other PES. Moreover, the provided information on stereodynamics leads to an in-depth understanding of the role of collision energy in product distribution.

Automated summary

A precise analytical potential energy surface (PES) of HCO(X(2)A') is fitted using ab initio energy points and a many-body expansion formula. The topographic characteristics and reaction probabilities, cross sections, and rate constants are computed and compared with previous results. The stereodynamics information provides insight into the role of collision energy in product distribution.