Solving the kinetic master equation for the gas-phase system enables us to determine the temperature-and pressure-dependent reaction rate coefficients. The PES can quickly provide the geometries, frequencies and energies of the stationary points, which are required to obtain the microcanonical flux coefficients for the coefficient matrix in the master equation. The input data of master equation (including collisional parameters ε and σ) reported in refs are reused here and given in Table . The TUMME package was used to carry out all master equation calculations.