Journal of Physical Chemistry p. 5990 - 5995 (1984)
Update date:2022-08-28
Topics:
Rao, V. Subba
Skinner, Gordon B.
Dilute mixtures (3-20 ppm) of C6D6 (benzene-d6) were pyrolyzed behind reflected shock waves at temperatures of 1630-1940 K and total pressures of 2-3 atm.Progress of the reaction was followed by analysis for D atoms using resonance absorption spectroscopy.Appearance of D atoms was a first-order process with respect to benzene concentration, and with respect to time during the first part of each experiment.An Arrhenius equation for the formation of D atoms, based on 34 experiments, is kD = 9.7E12 exp(-87100 cal/RT) s-1 with an estimated uncertainty of a factor of 1.5.From measurements of H atoms during pyrolysis of chlorobenzene under similar conditions at 1570-1790 K, the first-order rate constant for the dissociation of chlorobenzene to chlorine atoms and phenyl radicals was found to be k6 = 1.2E14 exp(-90000 cal/RT) s-1, and that for the dissotiation of phenyl radicals to H atoms and other products k3a = 1.2E15 exp(-82000 cal/RT) s-1.With this information, the rate constant for dissociation of benzene-d6 to phenyl-d5 and D atoms was found to be k1D = 4.6E13 exp(-95000 cal/RT) s-1.The rate constant for the exchange reaction H + C6D6 -> C6D5H + D was found to be k4a = 3.2E13 exp(-4200 cal/RT) mol-1 cm3 s-1 over the range 300-1400 K by combining our results with others at lower temperatures.A very simple kinetic model based on a reaction chain with H as carrier can relate our data to other shock-tube work at higher benzene concentrations.
View MoreYancheng Creator Chemical Co., Ltd
Contact:0086-515-88710008 88710068 88710858 88710868
Address:No.21 Renming Road, Longgang Town, Yandu County,Yancheng City
website:http://www.np-chem.com
Contact:0086-25-52346877
Address:199, Jian Ye Road, Nanjing, China
Hangzhou Donglou Bio-nutrient Co., Ltd.
Contact:+86-571-82225795,13967112289
Address:Louta Town, Xiaoshan,Hangzhou,Zhejiang
Contact:86-571-85586718
Address:join hands science park,NO.4028 nanhuan road,hanghzou ,zhejiang,china
Nanjing Spring & Autumn Biological Engineering Co., Ltd.
Contact:86-18051083338
Address:Suite# 210, No. 1 BuildingNanjing Agricultural Biotechnology High-tech Entrepreneurship Center, No. 4 Tongwei Road, Xuanwu District, Nanjing,China
Doi:10.1021/ol050668o
(2005)Doi:10.1016/j.tetlet.2013.08.050
(2013)Doi:10.1021/ja301992h
(2012)Doi:10.1002/chem.201705113
(2018)Doi:10.1007/BF00809233
(1987)Doi:10.1002/hlca.19650480728
(1965)