Experimental and theoretical study of the low-temperature kinetics of the reaction of CN with CH₂O and implications for interstellar environments.

ABSTRACT: Rate coefficients for the reaction of CN with CH₂O were measured for the first time below room temperature in the range 32-103 K using a pulsed Laval nozzle apparatus together with the Pulsed Laser Photolysis-Laser-Induced Fluorescence technique. The rate coefficients exhibited a strong negative temperature dependence, reaching (4.62 ± 0.84) × 10^-11 cm³ molecule^-1 s^-1 at 32 K, and no pressure dependence was observed at 70 K. The potential energy surface (PES) of the CN + CH₂O reaction was calculated at the CCSD(T)/aug-cc-pVTZ//M06-2X/aug-cc-pVTZ level of theory, with the lowest energy channel to reaction characterized by the formation of a weakly-bound van der Waals complex, bound by 13.3 kJ mol^-1, prior to two tr

SUBMITTER: West NA 

PROVIDER: S-EPMC10015628 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature