Journal
JOURNAL OF MOLECULAR STRUCTURE
Volume 1041, Issue -, Pages 122-126Publisher
ELSEVIER
DOI: 10.1016/j.molstruc.2013.03.017
Keywords
Malonic acid; Crystal structure; Polymorphism; Hydrogen bonding
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Funding
- National Science Foundation [DMR-0504000, CHE-0521047]
- Pfizer Institute of Pharmaceutical Materials Science
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The crystal structure of a fifth polymorph of malonic acid has been determined by single crystal X-ray diffraction. The unit cell parameters, crystal structure and calculated powder diffraction lines for the new polymorph (monoclinic, Z' = 3) are distinctly different from those of the reported forms. There are both similarities as well as differences in the arrangement of molecules in the crystal lattice in all the forms. The molecules, in all the polymorphs, interact through the formation of O-H center dot center dot center dot O hydrogen bonded dimers by -COOH group with significant differences between the forms within this packing pattern. (C) 2013 Elsevier B.V. All rights reserved.
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