Ubiquinones and their semiquinone radical anions

Isotropic hyperfme coupling constants have also been calculated for UQ and are summarized in Table 12.(5S) The table shows good agreement between 

Experimental hyperfine coupling constants for ubisemiquinone radical anions 103-105) compared with calculated hyperfine coupling constants and spin densities(58) for ubisemiquinone-1 radical anion (UQi ) from B3LYP/6-31G(d)//6-31G(d) and B3LYP/(632I41 )//6-31 G(d) calculations. 

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