Accession Number : AD0464329


Title :   REACTIONS OF ATOMIC OXYGEN WITH ACETYLENE (I), KINETICS AND MECHANISMS


Descriptive Note : Technical rept.,


Corporate Author : HARVARD UNIV CAMBRIDGE MA GIBBS CHEMICAL LAB


Personal Author(s) : Arrington, C A ; Brennen, W ; Glass, G P ; Michael, J V ; Niki, H


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/464329.pdf


Report Date : Mar 1965


Pagination or Media Count : 30


Abstract : The room temperature reaction of acetylene with atomic oxygen was studied in a moderately fast flow system. The course of the reaction was followed using both a Mass Spectrometer and a photometric method. The major products of the reaction were Co and H. Large amounts of atomic H were also observed. The rate of the overall reaction is determined by the first initial step in which atomic O adds to acetylene to yield an excited complex which then undergoes unimolecular decomposition to give triplet methylene. The rate constant for this initial reaction was measured, at room temperature, as (8.9 = 2.8)x 10 to the -14th power cc/mol sec. The activation energy was less than 1 kcal./mol. Experiments with acetylene-d2 established the reactions which constitute the major pathway by which triplet methylene is consumed.


Descriptors :   *REACTION KINETICS , *HYDROCARBONS , *OXIDATION , ATOMS , MASS SPECTROSCOPY , OXYGEN , GAS FLOW , HEAT OF ACTIVATION , IONIZATION , IONS , FREE RADICALS , LUMINESCENCE , DECOMPOSITION , EXCITATION , DEUTERIUM COMPOUNDS , RECOMBINATION REACTIONS


Subject Categories : Physical Chemistry


Distribution Statement : APPROVED FOR PUBLIC RELEASE