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A kinetic method of distinguishing isomeric C 3 H 5 + cations
Author(s) -
Riveros José M.,
Zhu Zhiqing
Publication year - 1991
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.1290050903
Subject(s) - chemistry , propenyl , allyl bromide , kinetic energy , ion , fourier transform ion cyclotron resonance , bromide , proton , analytical chemistry (journal) , kinetics , ion cyclotron resonance , resonance (particle physics) , medicinal chemistry , inorganic chemistry , cyclotron , organic chemistry , atomic physics , physics , quantum mechanics
A method is described of studying ion/molecule kinetics in a Fourier‐transform ion cyclotron resonance spectrometer of ions produced at precursor pressures of 6 × 10 −9 mBar with a neutral gas introduced through a pressure pulse of variable time. The analysis of the kinetic curves of the proton‐transfer reactions of C 3 H 5 +cations to CH 3 OH yields either single or double exponential decays that can readily be used to obtain the percentages of allyl and 2‐propenyl cations produced by different precursors. Allyl bromide is shown to produce 100% allyl cations while 2‐bromopropene at 13 eV yields roughly 74% of 2‐propenyl and 26% of allyl cations.