Abstract:
Dissociative charge exchange reactions between Ar
+ ion and
trans-/
cis-dichloroethylene (
trans-/
cis-C
2H
2Cl
2) are investigated with the ion-velocity imaging technique. The dechlorinated product C
2H
2Cl
+ is the predominant, and most of this product show the spatial distribution around the target, implying that the dissociation occurs in the large impact-parameter collision and via the energy resonant charge transfer. Meanwhile, a few C
2H
2Cl
+ locate around the center-of-mass, which is attributed to the fragmentation of intimate association between C
2H
2Cl
2 and Ar
+ or in the small impact-parameter collision. The product C
2HCl
+ exhibits the velocity distribution features similar to those of C
2H
2Cl
+. The rarest product C
2HCl
2+ shows the distributions around the molecular target, due to the quick dehydrogenation after the energy-resonant charge transfer in the large impact-parameter collision.