Experimental values of rate constants and ion product distributions for reactions of a series of ions with CS 2

Abstract

Rate constants and product ion distributions have been determined in a Selected Ion Flow Tube (SIFT) for the reactions of He +, He 2 +, Ar +, N 2 +, N +, CO +, CO 2 +, O +, D +, CS +, C +, S +, CS 2 +, S 2 + and D 3 + with CS 2 at 297 K. These ions have recombination energies varying from 2372 kJ/mol (24.58 eV) for He + to 903 kJ/mol (9.36 eV) for S 2 +. The reactions, except for the Ar +, S 2 + and CS 2 + reactions proceed at, or close to, the collisional rate with charge transfer (both dissociative and non-dissociative) being an important mechanism. S + is a common product and, in the case of D 3 +, exothermic proton transfer is rapid. For the slower reaction of CS 2 +, ternary association occurs. The reactions are discussed relative to the reactivity of these ions with the analogues, OCS and CO 2.