【摘要】 通过对23个羟基蒽醌衍生物的质子核磁共振研究,观察了不同取代类型羟基的化学位移范围;讨论了酚羟基乙酰化对芳环质子的化学位移影响,为羟基取代位置的确定及芳环质子谱线归属提供了某种判据.此外,还用 HMO 法探讨了各类取代羟基的氢键强度及羰基迫位仅有一个羟基的内氢键强度与给予原子电荷密度的关系.更多还原

【Abstract】 The chemical shifts of five types of substituted hydroxyl groups as well as theacylation shifts of aromatic protons in anthraquinone series have been studiedsystematically.These parameters may be used as criteria for the assignment of signalsand the location of hydroxyl group in the aromatic system.In addition,by means ofHMO method the strength of the hydrogen bonding is approached in various substitutedhydroxyl groups.The linear relationship is found between the △δ_OHvalue and thecharge density of the donation atom(q_co)in anthraquinones with a peri-OH group.Consequently,the strength of intramolecular hydrogen bonding is dominated by themagnitude of q_co.更多还原