Theoretical calculation by Yu and Muckerman (2004) considering configuration interaction, give the ratios of pathways of (5.17) (5.18) and (5.19) to form OH, H and H2, respectively, as 0.725, 0.186and 0.025, respectively, reproducing well the experimental results, and also suggested that the reaction pathway, CH2 + H2O exists in the ratio of 0.064.