Rate coefficients for reactions of OH and Cl with esters.
Rate coefficients for the gas-phase reactions of OH radicals with n-propyl butyrate (k(1)), n-butyl propionate (k(2)) and n-butyl butyrate (k(3)) are measured by both absolute and relative methods. The kinetics data obtained over the temperature range 273-372 K are used to derive the Arrhenius expressions (in units of cm(3) molecule(-1) s(-1)): k(1)=(1.92±0.50)×10(-12) exp[(400±80)/T], k(2)=(2.98±1.32)×10(-12) exp[(209±139)/T] and k(3)=(5.35±3.34)×10(-12) exp[(180±194)/T]. In addition, the rate coefficients for reactions of the three esters with Cl atoms are determined by the relative-rate method at room temperature and atmospheric pressure. The rate coefficients measured are (in units of 10(-10) cm(3) molecule(-1) s(-1)) as follows: n-propyl butyrate (1.4±0.1), n-butyl propionate (1.6±0.1), and n-butyl butyrate (1.7±0.1). The values obtained are presented, compared with previous determinations and discussed. Reactivity trends and atmospheric implications resulting from this work are also presented.
Liang
Peng
P
Research Center for Eco-Environmental Sciences (RCEES), Chinese Academy of Sciences, Beijing 100085, P. R. China.
Mu
Yujing
Y
Daële
Véronique
V
Mellouki
Abdelwahid
A
D000393:Air Pollutants; D001272:Atmosphere; D001274:Atmospheric Pressure; D002087:Butyrates / Q000737:chemistry; D002713:Chlorine / Q000737:chemistry; D004952:Esters / Q000737:chemistry; D017665:Hydroxyl Radical / Q000737:chemistry; D007700:Kinetics; D007834:Lasers; D010782:Photolysis; D011422:Propionates / Q000737:chemistry; D013696:Temperature
D000393:Air Pollutants; D002087:Butyrates; D004952:Esters; D011422:Propionates; C022793:n-butyl n-butyrate; C414503:n-butylpropionate; D017665:Hydroxyl Radical; D002713:Chlorine