Contrasting free energies of electron transfer from [6] and [8]annulenes to their erdeuteriated-per-13C analogues
作者:Gerald R Stevenson、Steven J Peters、Kerry A Reidy
DOI:10.1016/s0040-4039(00)97011-4
日期:1990.1
EPR analysis shows that the equilibrium isotope effect upon the equilibrium constant for electron transfer between isotopic isomers is much larger in [6]annulene (i.e. C6H6−. + 13C6D6 = C6H6 + 13C6D6−.) than in the [8]annulene systems (i.e. C8H8−. + 13C8D8 = C8H8 + 13C8D8−.). This is due to the effects of aromaticity.
EPR分析表明,在[6]环戊烯中,同位素同位素对同位素异构体之间电子转移的平衡常数的影响要大得多(即C 6 H 6 -。 + 13 C 6 D 6 = C 6 H 6 + 13 C 6 D 6- 。)比[8]环戊烯体系(即C 8 H 8 -。 + 13 C 8 D 8 = C 8 H 8 + 13 C 8 D 8- )高。)。这是由于芳香性的影响。