NH 4 + Association and Proton Transfer Reactions With a Series of Organic Molecules.

ABSTRACT: In this study, we present reactions of NH 4 + with a series of analytes (A): acetone (C₃H₆O), methyl vinyl ketone (C₄H₆O), methyl ethyl ketone (C₄H₈O), and eight monoterpene isomers (C₁₀H₁₆) using a Selective Reagent Ionization Time-of-Flight Mass Spectrometer (SRI-ToF-MS). We studied the ion-molecule reactions at collision energies of 55 and 80 meV. The ketones, having a substantially lower proton affinity than NH₃, produce only cluster ions NH 4 + (A) in detectable amounts at 55 meV. At 80 meV, no cluster ions were detected meaning that these adduct ions are formed by strongly temperature dependent association reactions. Bond energies of cluster ions and proton affinities for most mon

SUBMITTER: Canaval E 

PROVIDER: S-EPMC6457267 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature