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Solid-state tautomerism in 2-carboxyindan-1,3-dione

机译:2-羧基茚满-1,3-二酮的固态互变异构

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摘要

The structure of 2-carboxyindan-1,3-dione was investigated using a combination of quantum-chemical calculations and solid-state NMR and IR spectroscopy. Due to poor solubility of the compound in different solvents, no single crystals could be obtained. Two dimeric structures formed from the tautomers of 2-carboxyindan-1,3-dione are likely to coexist in the solid state. The dimers interconvert via intramolecular proton transfer in one of the tautomeric forms constituting the dimers. The energy barrier of the intramolecular proton transfer reaction is calculated as 5.82 kcal mol ~(-1) at the MP2/6-31++G level of theory.
机译:结合量子化学计算,固态NMR和IR光谱研究了2-羧基茚满-1,3-二酮的结构。由于化合物在不同溶剂中的溶解性差,因此无法获得单晶。由2-羧基茚满-1,3-二酮的互变异构体形成的两个二聚体结构可能以固态共存。二聚体通过分子内质子转移以构成二聚体的互变异构形式之一相互转化。在理论上MP2 / 6-31 ++ G的水平上,分子内质子转移反应的能垒为5.82 kcal mol〜(-1)。

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