Exploring the OH¿CO\H¿CO2 potential surface via dissociative photodetachment of „HOCO...À
نویسندگان
چکیده
Dissociative photodetachment ~DPD! of the molecular anion HOCO is used to probe the potential energy surface for the OH1CO→H1CO2 reaction. The HOCO anion, formed by electron impact on an expansion of CH41N2O1CO, is characterized for the first time in these experiments by photoelectron spectroscopy and photoelectron angular distribution measurements. Photodetachment of HOCO is found to produce H1CO21e 2 and OH1CO1e products in addition to stable HOCO radicals. Ab initio calculations of the energetics and structure of HOCO and HOCO are consistent with the experimental results and show that photodetachment to the ground electronic HOCO surface samples the vicinity of the HOCO well. The product translational energy distributions observed on the ground state surface are consistent with unimolecular decomposition out of the HOCO well. In addition, direct DPD to a repulsive excited state of HOCO, correlating to ground state OH1CO products is observed. © 2002 American Institute of Physics. @DOI: 10.1063/1.1505439#
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