Is the gas-phase OH+H₂CO reaction a source of HCO in interstellar cold dark clouds? A kinetic, dynamic and modelling study.

ABSTRACT: Chemical kinetics of neutral-neutral gas-phase reactions at ultralow temperatures is a fascinating research subject with important implications on the chemistry of complex organic molecules in the interstellar medium (T∼10-100K). Scarce kinetic information is currently available for this kind of reactions at T<200 K. In this work we use the CRESU (Cinétique de Réaction en Ecoulement Supersonique Uniforme, which means Reaction Kinetics in a Uniform Supersonic Flow) technique to measure for the first time the rate coefficients (k) of the gas-phase OH+H₂CO reaction between 22 and 107 K. k values greatly increase from 2.1×10^-11 cm³ s^-1 at 107 K to 1.2×10^-10 cm³ s^-1 at 22 K. This is also confirmed

SUBMITTER: Ocana AJ 

PROVIDER: S-EPMC5988043 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature