Lawrence Berkeley National Laboratory
Selective bond-breaking in formic acid by dissociative electron attachment.
- Author(s): Slaughter, DS
- Weber, Th
- Belkacem, A
- Trevisan, CS
- Lucchese, RR
- McCurdy, CW
- Rescigno, TN
- et al.
Published Web Locationhttps://doi.org/10.1039/d0cp01522a
We report the results of a joint experimental and theoretical study of dissociative electron attachment to formic acid (HCOOH) in the 6-9 eV region, where H- fragment ions are a dominant product. Breaking of the C-H and O-H bonds is distinguished experimentally by deuteration of either site. We show that in this region H- ions can be produced by formation of two or possibly three Feshbach resonance (doubly-excited anion) states, one of which leads to either C-H or O-H bond scission, while the other can only produce formyloxyl radicals by O-H bond scission. Comparison of experimental and theoretical angular distributions of the anion fragment allows the elucidation of state specific pathways to dissociation.