Thermal reaction of (CH<sub>3</sub>)<sub>2</sub>C=C(CH<sub>3</sub>)<sub>2</sub> in the presence of di-tert-butyl peroxide; reactions of the radicals ˙CH<sub>3</sub>, (CH<sub>3</sub>)<sub>3</sub>C˙C(CH<sub>3</sub>)<sub>2</sub> and (CH<sub>3</sub>)<sub>2</sub>C=C(CH<sub>3</sub>)˙CH<sub>2</sub>
作者:T Körtvélyesi、L Seres
DOI:10.1051/jcp/1996930253
日期:——
A study of the thermal reaction of (CH3)2C=C(CH3)2 (23DMB2) in the presence of di-t-butyl peroxide (PODBT) at 389-451 K yielded kinetic data on some reactions of the radicals ˙CH3, (CH3)3C˙C(CH3)2 (1122TMP˙) and (CH3)2C=C(CH3)˙CH2 (112TMA˙).The ratio of the cross-combination ratios of the radicals ϕ(112ΤΜΑ˙,1122ΤΜΡ˙)/ϕ(CΗ3,1122ΤΜΡ˙) and the rate constant for H-abstraction from 23DMB2 by ˙CH3 relative to that of the recombination reaction,˙CH3 + (CH3)2C=C(CH3)2 → СН4 + (СН3)2С=С(СН3)˙СН2 (4)2 ˙CH3 → C2H6 (7)have been determined. The values areϕ(1122TMP˙, 112ΤΜΑ˙)/ϕ˙CΗ3,1122TMP˙) = 0.9 ± 0.3log(k4/k71/2) = (3.74 ± 0.21) - (36.3 ± 2.2)/Θwhere Θ = RT ln 10 and the units are dm3/2 mol-1/2 s-1/2 for k4/k71/2, and kJ mol-1 for the energy of activation.
在二叔丁基过氧化物(PODBT)存在下,于 389-451 K 对 (CH3)2C=C(CH3)2 (23DMB2) 的热反应进行了研究,得出了自由基 ˙CH3 的一些反应的动力学数据、(CH3)3C˙C(CH3)2 (1122TMP˙) 和 (CH3)2C=C(CH3)˙CH2 (112TMA˙) 的一些反应的动力学数据。自由基 j(112ΤΜΑ˙,1122ΤΜΡ˙)/j(CΗ3、1122ΤΜΡ˙)和 ˙CH3 从 23DMB2 中萃取 H 的速率常数相对于重组反应的速率常数、˙CH3 + (CH3)2C=C(CH3)2 → СН4 + (СН4)(СН3)2С=С(СН3)˙СН2 (4)2 ˙CH3 → C2H6 (7) 已测定。其数值为j(1122TMP˙, 112ΤΜΑ˙)/j˙CΗ3,1122TMP˙) = 0.9 ± 0.3log(k4/k71/2) = (3.74 ± 0.21) - (36.3 ± 2.2)/Θ 其中 Θ = RT ln 10,对于 k4/k71/2 ,单位为 dm3/2 mol-1/2 s-1/2,对于活化能,单位为 kJ mol-1。