Three Polymorphic Forms of the Co-Crystal 4,4′-Bipyridine/Pimelic Acid and their Structural, Thermal, and Spectroscopic Characterization

被引：67

作者：

Braga, Dario ^{[1
]}

Palladino, Giuseppe ^{[1
]}

Polito, Marco ^{[1
]}

Rubini, Katia ^{[1
]}

Grepioni, Fabrizia ^{[1
]}

Chierotti, Michele R. ^{[2
]}

Gobetto, Roberto ^{[2
]}

机构：

[1] Univ Bologna, Dipartimento Chim G Ciamician, I-40126 Bologna, Italy

[2] Univ Turin, Dipartimento Chim IFM, I-10125 Turin, Italy

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2008年 / 14卷 / 32期

关键词：

co-crystals; hydrogen bonds; NMR spectroscopy; polymorphism; solid-state structures;

D O I：

10.1002/chem.200801051

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Three crystal forms of the co-crystal 4,4'-bipy/pimelic acid (bipy: bipyridine), [NH4C5-C5H4N]center dot[HOOC-(CH2)(5)COOH], have been prepared and their relationship investigated by single-crystal X-ray diffraction, variable-temperature X-ray powder diffraction, differential scanning calorimetry and solid-state NMR spectroscopy. Both X-ray and NMR spectroscopic results indicate that no proton transfer takes place, that is, the three crystal forms are true co-crystals of neutral molecules. Forms I and II both convert into Form III at high temperature, Forms II and III being the thermodynamically stable forms at room and high temperature, respectively.

引用

页码：10149 / 10159

页数：11

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[1] Improving success rate of hydrogen-bond driven synthesis of co-crystals [J].