Ab Initio υπολογισμοί για το σύστημα (BrO)2 και δυναμική μελέτη της αντίδρασης διμερισμού BrO + BrO
Abstract
Ab initio quantum mechanical studies for BrOOBr peroxide and its isomers were carried out at the MP2 level of theory using the 6-311++<3(3 df) basis set. Three minima were determined which are in good consistency with previous density functional theory calculations. On the basis o f the ab initio results a simple analytical potential energy surface (PES) was constructed and quasiclassical trajectory calculations (QCT) for the self-reaction of BrO radical were performed. Reactive cross-sections, rate coefficients and branching rations for the tow reactive channels are calculated for a series of initial relative kinetic energies which compare favourably with the experimental trends. The quantum mechanical calculations and the analysis o f the trajectory results support the experimental evidence that the reaction proceeds through an energetically enriched conformer o f BrOOBr peroxide. Inaddition, the increasing collision lifetime with decreasing collision energy indicates a possible weak ...
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