Gas-Phase Ion-Molecule Reactions of the Nitric Oxide Anion

Article abstract of DOI:10.1021/ja00186a006

The chemical reactivity of nitric oxide anion (NO(1-)) with a variety of organic neutrals at ambient energies and in argon bath gas has been probed using the flowing afterglow technique.The reactions fall into four main classes: electron transfer, dissociative electron transfer and/or displacement, collisional detachment, and clustering.Electron transfer can occur when the neutral reactant possesses a positive electron affinity greater than the electron affinity of NO^., but does not always do so.Bimolecular substitution at sulfur is shown to occur with dimethyldisulfide, but for other substrates, distinguishing between displacement and dissociative electron transfer is not possible.Collisional detachment is the exclusive reaction channel observed for a few of the molecules examined and occurs to some extent with many of the neutrals tested.Cluster ion formation between NO(1-) and a number of the reactant neutrals which possess permanent dipole moments is observed.Additional pathways were observed for several of the neutrals examined.The collected observations are discussed in light of the general theory of ion-molecule reactions.