This paper studies the influence of the reagent vibration on the reaction O( 1 D)+HF→HO+F by using a quasiclassical trajectory method on the new ab initio 1 A ′ ground singlet potential energy surface (Gómez-Carrasco et al 2007 Chem. Phys. Lett. 435 188-193). The product angular distributions which reflect the vector correlation are calculated. Four polarization-dependent differential cross sections (PDDCSs) which are sensitive to many photoinitiated bimolecular reaction experiments are presented in the center of the mass frame, respectively. The differential cross section indicates that the OH product mainly tends to the forward scattering, and other PDDCSs are also influenced by the vibration levels of HF.

Quasi-classical trajectory calculations are carried out for the exothermic reaction H+BrF→HBr+F on the latest London-Eyring-Polanyi-Sato potential energy surface. The product angular distributions which reflect the vector correlation are calculated. Polarization dependent differential cross sections which are sensitive to many photoinitiated bimolecular reactions are presented in the center of mass frame. The calculated results suggest that the product rotational polarization becomes stronger as collision energy increases and the products were mainly backward scatteried. By comparing the product polarization of reactions D+BrF→DBr+F and H+BrF→HBr+F, the isotope effects have also been revealed.

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