Hyperfine coupling constants and g-factors determined by ESR and ENDOR spectroscopy are given for the radical anions of 21 syn-1,6:8,13-bridged [14]annulenes. The great majority of these values is reported for the first time. The hyperfine data are consistent with the single occupancy of an orbital which resembles a π-perimeter-LUMO of the same nodal properties. The sum of the coupling constants of
对于21 syn -1,6:8,13桥联[14]
环戊烯的自由基阴离子,给出了由ESR和ENDOR光谱法测定的超精细偶合常数和g因子。这些值中的绝大多数是首次报告。超精细数据与具有相同节点特性的类似π-perimeter-LUMO的轨道的单次占用是一致的。附着在π周边上的质子的耦合常数之和可以用作该周边的平面度标准。