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Ranking Relative Hydrogen-Bond Strengths in Hydroxybenzoic Acids for Crystal-Engineering Purposes

机译:用于晶体工程目的的羟基苯甲酸相对氢键强度排名

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摘要

Systematic co-crystallizations resulting in a total of six new crystal structures involving either 3-hydroxy- or 4-hydroxybenzoic acid, complemented by calculated molecular electrostatic potential surfaces and existing structural data, have shown that in a competitive molecular recognition situation, the -OH moiety is a more effective hydrogen-bond donor than the -COOH moiety which, in turn, highlights that electrostatic charge can offer more useful guidance than acidity for predicting competitive hydrogen-bond preferences.
机译:系统共结晶产生总共6个涉及3-羟基-或4-羟基苯甲酸的新晶体结构,再加上计算出的分子静电势表面和现有的结构数据,表明在竞争性分子识别的情况下,-OH -COOH部分比-COOH部分是更有效的氢键供体,这反过来凸显了静电荷可以提供比酸度更有用的指导,以预测竞争性氢键偏好。

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