【4】当加入环己烷时,它的影响较小。这也许是因为其不含有(-OH)而不能与体系形成分子间氢键所导致的。因而,这个现象也正好表明分子间氢键的形成对于共振增强是重要的。
(4) When cyclohexane was added, it showed small influence. The reason may be that cyclohexane molecule has no hydroxyl group (-OH) thus no intermolecular hydrogen bond with MB-Hb system could form. Therefore, this result indicated that the intermolecular hydrogen bond plays an important role for the resonance enhancement.