The <i>D</i> Parameter (EPR Zero-Field Splitting) of Localized 1,3-Cyclopentanediyl Triplet Diradicals as a Measure of Electronic Substituent Effects on the Spin Densities in <i>Para</i>-Substituted Benzyl-Type Radicals
作者:Waldemar Adam、Fumio Kita、Heinrich M. Harrer、Werner M. Nau、Rainer Zipf
DOI:10.1021/jo960396q
日期:1996.1.1
parameter of the tripletdiradical species. A theoretical analysis shows that the Dparameter is a measure of the spin density rho at the benzylic positions and the inter-radical distance d in localized diradicals. A good correlation exists between the Dparameter of these tripletdiradicals (constant inter-radical distance d) and the EPR hyperfine coupling constants of the corresponding benzyl-type monoradicals