Ion–molecule reactions in vinyl chloride and vinyl bromide

Abstract

The following ion–molecule reactions involving fragment ions in vinyl chloride have been studied and rate constants measured for ions of 2.4 eV exit energy.[Formula: see text]The reaction of the C2H3Cl+ molecule-ion produces C3H4Cl+, C4H5Cl+, and C4H6Cl+ both in a second order and a third order reaction. The apparent rate coefficient for the second order reaction is approximately 1 × 10−11 cm3 molecule−1 s−1 while that for the third order reaction is approximately 1 × 10−25 cm6 molecule−2 s−1. The product distributions from both the second and third order reactions have been determined.In vinyl bromide the C2H3+ ion produces C4H5+, C4H6+, and C2H4Br+ while the C2H3Br+ ion reacts to form C4H6Br+ both in a second order and a third order reaction.