“…The D* values of the T 1 states of 4-methylanisole, 4-fluoroanisole, toluene, ethylene and formaldehyde were estimated to be 0.1547, 0.1560, 0.1517, 0.4310 and 0.43 cm À1 , respectively (42)(43)(44)(45)(46). As the observed D** value of EHMCR is fairly smaller than those of methoxyphenyl, tolyl, ethylenic and carbonyl fragments, the two unpaired electrons localize on neither the methoxyphenyl, nor the tolyl, nor the ethylenic, nor the carbonyl fragment.…”