“…As the number of oxygen atoms that are available for reaction is larger than the given amount of S atoms, other reactions involving O atoms do take place synthesizing CO 3 , O 3 and OCS. Synthesizing CO 3 could be via O atom addition to CO 2 , as given in equation 7, whereas for making O 3 , O atoms have to undergo a series of two-step reaction in synthesizing O 2 first and an addition of O atom to make O 3 , as given in equation (8). However, synthesizing OCS could occur via an addition of O to CS or S to CO (equation 10) with a third possibility of C, S, O atoms combining first to make either CS or CO first and then adding O or S, respectively, to synthesize OCS.…”