The input data represents the first step in this process. All stationary points (reactants, products, intermediate complexes and saddle point) were located (geometry optimization) and characterized (vibrational frequencies, where the first points were characterized by positive values, while the saddle point presents only one imaginary frequency) using high level ab initio calculations, coupled-cluster with single, double and triple (perturbative) excitations with basis sets of triple-zeta quality, CCSD(T)/cc-pVTZ.