Measurements of Rate Constants for Termolecular Reactions of O(3P) with NO, O2, CO, N2, and CO2Using a Pulsed Vacuumhyphen;uv Photolysismdash;Chemiluminescent Method

摘要

Absolute rate constants for a number of termolecular reactions of O atoms were determined at 300deg;K. Oxygen atoms were generated by pulsed vacuumhyphen;uv photolyses of NO, O2, CO2, and N2O and were monitored byNO2*orCO2*chemiluminescent emission. The rate constantsk, in units of cm6moleculeminus;2middot;secondminus;1, for the following reactions are:Oplus;NOplus;NOrarr;NO2plus;NO,thinsp;thinsp;thinsp;kequals;1.5times;10minus;31thinsp;lpar;plusmn; 10 percnt;rpar;Oplus;NOplus;Herarr;NO2plus;He,thinsp;thinsp;thinsp;kequals;6.65times;10minus;32thinsp;lpar;plusmn; 10percnt;rpar;Oplus;O2plus;O2rarr;O3plus;O2,thinsp;thinsp;thinsp;kequals;6.4times;10minus;34thinsp;lpar;plusmn; 25 percnt;rpar;Oplus;O2plus;N2rarr;O3plus;N2,thinsp;thinsp;thinsp;kequals;5.4times;10minus;34thinsp;lpar;plusmn; 25 percnt;rpar;Oplus;O2plus;COrarr;O3plus;CO,thinsp;thinsp;thinsp;kequals;6.7times;10minus;34thinsp;lpar;plusmn; 25 percnt;rpar;Oplus;COplus;COrarr;CO2plus;CO,thinsp;thinsp;thinsp;kequals;3.2times;10minus;36thinsp;lpar;plusmn; 25 percnt;rpar;Oplus;COplus;N2rarr;CO2plus;N2,thinsp;thinsp;thinsp;kequals;2.2times;10minus;36thinsp;lpar;plusmn; 25 percnt;rpar;Oplus;COplus;Herarr;CO2plus;He,thinsp;thinsp;thinsp;kequals;1.7times;10minus;36thinsp;lpar;plusmn; 25 percnt;rpar;Oplus;CO2plus;COrarr;CO3plus;CO,thinsp;thinsp;thinsp;klang;9times;10minus;36Oplus;N2plus;N2rarr;N2Oplus;N2,thinsp;thinsp;thinsp;klang;5times;10minus;38.