Reactivity of radicals CCl3(CH2CHR)n (R=H, CH3, Cl; n=1, 2) in addition reactions with unsaturated compounds
摘要:
Using EPR spectroscopy, the rate constants for the addition of radicals CCl3(CH2.CH2)n. (R1 for n = 1 and R2 for n = 2), CCl3CH2C.HCH3 (R3), and CCl3CH2C.HCl (R4) to unsaturated compounds CH2 = CHX (X = C6H5, COOCH3, CN) and CH2 = C(CH3)Y (Y = C6H5, COOCH3) at 22-degrees-C have been determined. The radicals R1 and R2 exhibit ambiphilic, and R4 electrophilic character towards the selected unsaturated compounds. It has been shown that the presence of the CCl3 group in the gamma-position of the radical center has little effect on the reactivity of the radical. Replacement of a hydrogen on the alpha-carbon in radical R1 by a (CH)-H-3 group or chlorine atom leads to a considerable reduction in the rate of addition of the radicals to the unsaturated compounds examined.
EPR determination of rate constant of splitting chlorine from CCl4 by telomeric radicals CCl3(CH2CHCl)n� (n=1,2) and their addition to vinyl chloride and nitrosodurene
EPR determination of rate constant of splitting chlorine from CCl4 by telomeric radicals CCl3(CH2CHCl)n� (n=1,2) and their addition to vinyl chloride and nitrosodurene
作者:R. G. Gasanov、L. V. Ivanova、N. A. Grigor'ev
DOI:10.1007/bf00948616
日期:1984.9
Reactivity of radicals CCl3(CH2CHR)n (R=H, CH3, Cl; n=1, 2) in addition reactions with unsaturated compounds
作者:R. G. Gasanov、L. V. Il'inskaya、A. L. Tumanskaya
DOI:10.1007/bf00957978
日期:1991.3
Using EPR spectroscopy, the rate constants for the addition of radicals CCl3(CH2.CH2)n. (R1 for n = 1 and R2 for n = 2), CCl3CH2C.HCH3 (R3), and CCl3CH2C.HCl (R4) to unsaturated compounds CH2 = CHX (X = C6H5, COOCH3, CN) and CH2 = C(CH3)Y (Y = C6H5, COOCH3) at 22-degrees-C have been determined. The radicals R1 and R2 exhibit ambiphilic, and R4 electrophilic character towards the selected unsaturated compounds. It has been shown that the presence of the CCl3 group in the gamma-position of the radical center has little effect on the reactivity of the radical. Replacement of a hydrogen on the alpha-carbon in radical R1 by a (CH)-H-3 group or chlorine atom leads to a considerable reduction in the rate of addition of the radicals to the unsaturated compounds examined.