Atmospheric chemistry of n-CxF2x+1CHO (x=1, 3, 4): Reaction with Cl atoms, OH radicals and IR spectra of CxF2x+1C(O)O2NO2

Andersen MPS; Nielsen OJ; Hurley MD; Ball JC; Wallington TJ; Stevens JE; Martin JW; Ellis DA; Mabury SA

Journal of Physical Chemistry A, Vol.108, No.24, 5189-5196, 2004

Andersen MPS, Nielsen OJ, Hurley MD, Ball JC, Wallington TJ, Stevens JE, Martin JW, Ellis DA, Mabury SA

Smog chamber/FTIR techniques were used to measure (Cl + n-CxF2x+1CHO, x = 1, 3, 4) = (2.1 +/- 0.5) x 10(-12) and k(OH + n-CxF2x+1CHO, x = 1, 3, 4) = (6.5 +/- 1.2) x 10(-13) cm(3) molecule(-1) s(-1) in 700 Torr of N-2, or air, at 296 +/- 2 K. Cl-initiated oxidation of n-CxF2x+1CHO in the presence of NO in air diluent gave COF2 in molar yields of 91 +/-11%, x = 1; 273 +/- 36%, x = 3; and 371 +/- 44%, x = 4. Small quantities (molar yields less than or equal to 3%) of CF3ONO2 and n-CxF2x+1C(O)O2NO2 were also observed. IR spectra of n-CxF(2x+1)C(O)O2NO2 (x = 1, 3, 4) are reported. Results are discussed with respect to the atmospheric degradation of fluorinated aldehydes, CxF2x+1CHO.