Khoj, Manal A., Hughes, Colan E., Harris, Kenneth D. M.  ORCID: https://orcid.org/0000-0001-7855-8598 and Kariuki, Benson M. ORCID: https://orcid.org/0000-0002-8658-3897
2018.
Polymorphic phase transformations of 3-chloro-trans-cinnamic acid and its solid solution with 3-bromo-trans-cinnamic acid.
Acta Crystallographica Section C: Structural Chemistry
74
(8)
, pp. 923-928.
10.1107/S2053229618009269
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Abstract
We have investigated the polymorphic phase transformations above ambient temperature for 3-chloro-trans-cinnamic acid (3-ClCA, C9H7ClO2) and a solid solution of 3-ClCA and 3-bromo-trans-cinnamic acid (3-BrCA, C9H7BrO2). At 413 K, the γ polymorph of 3-ClCA transforms to the β polymorph. Interestingly, the structure of the β polymorph of 3-ClCA obtained in this transformation is different from the structure of the β polymorph of 3-BrCA obtained in the corresponding polymorphic transformation from the γ polymorph of 3-BrCA, even though the γ polymorphs of 3-ClCA and 3-BrCA are isostructural. We also report a high-temperature phase transformation from a γ-type structure to a β-type structure for a solid solution of 3-ClCA and 3-BrCA (with a molar ratio close to 1:1). The γ polymorph of the solid solution is isostructural with the γ polymorphs of pure 3-ClCA and pure 3-BrCA, while the β-type structure produced in the phase transformation is structurally similar to the β polymorph of pure 3-BrCA.
| Item Type: | Article |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Chemistry Advanced Research Computing @ Cardiff (ARCCA) |
| Publisher: | International Union of Crystallography |
| ISSN: | 2053-2296 |
| Date of First Compliant Deposit: | 25 July 2018 |
| Date of Acceptance: | 26 June 2018 |
| Last Modified: | 11 May 2023 19:28 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/113456 |
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