Experimental values of rate constants and ion product distributions for reactions of a series of ions with CS2

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 .