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.