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- Title
Crystal structures of а series of 1-substituted imidazol-4,5-dicarboxylic acids.
- Authors
Brusina, Maria A.; Gurzhiy, Vladislav V.; Myznikov, Leonid V.; Iljin, Viktor V.; Ramsh, Stanislav M.; Piotrovskiy, Levon B.
- Abstract
Crystal structure of a series of 1-alkylimidazole-4,5-dicarboxylic acids has been determined. It is shown that an increase in the length of the alkyl group leads to drastic changes in the crystal and molecular structures. 1-Methyl and 1-ethylimidazole-4,5-dicarboxylic acid crystallize in zwitterionic form, but 1-propyl- and 1-butylimidazole-4,5-dicarboxylic acid crystallize as rare equimolar mixture of neutral and zwitterionic tautomeric forms. The observed changes in the crystal and molecular structures are apparently associated with the steric factor, which determines both the packing method and the tautomeric composition of the unit cell.
- Subjects
CRYSTAL structure; MOLECULAR crystals; UNIT cell; ALKYL group; ACIDS
- Publication
Zeitschrift für Kristallographie. Crystalline Materials, 2024, Vol 239, Issue 1/2, p43
- ISSN
2194-4946
- Publication type
Article
- DOI
10.1515/zkri-2023-0022