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研究了一系列二芳甲酰甲烷化合物在不同溶剂中的分子内氢键及酮-烯醇互变异构平衡。δ_(OH)和lgK与取代基常数(σ)之间均有良好的线性关系存在。+I和+R取代基使分子内氢键增强,而使烯醇式含量降低。
The intramolecular hydrogen bonding and the keto-enol tautomerism of a series of diarylcarbonyl methane compounds in different solvents were studied. There is a good linear relationship between δ_ (OH) and lgK and the substituent constant (σ). The + I and + R substituents enhance the intramolecular hydrogen bond, leaving the enol content to decrease.