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Polymorphism in co-crystals : a metastable form of the ionic co-crystal 2 HBz-1 NaBz crystallised by flash evaporation

Title data

Butterhof, Christian ; Bärwinkel, Kilian ; Senker, Jürgen ; Breu, Josef:
Polymorphism in co-crystals : a metastable form of the ionic co-crystal 2 HBz-1 NaBz crystallised by flash evaporation.
In: CrystEngComm. Vol. 14 (2012) Issue 20 . - pp. 6744-6749.
ISSN 1466-8033
DOI: https://doi.org/10.1039/C2CE25562F

Official URL: Volltext

Project information

Project title:
Project's official title
Project's id
Kristalline Nichtgleichgewichtsphasen (KNG) - Präparation, Charakterisierung und in-situ-Untersuchung der Bildungsmechanismen
SPP1415

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

While polymorphism is a wide spread phenomenon, the number of reported polymorphic co-crystals is still very limited. Here we report the synthesis and structural characterisation of such a rare case of polymorphism with a co-crystal of benzoic acid (HBz) and sodium benzoate (NaBz). Flash evaporation yielded a new polymorph of this ionic co-crystal with a stoichiometry of 2 HBz·1 NaBz. The thermodynamic relationship between the known and the new polymorph was determined to be of enantiotropic nature. At room temperature, this new form B is metastable. While the known form A is composed of one dimensional tapes, form B is built from infinite rods. The coordination sphere of sodium, however, in both forms is octahedral and the packing around it is dense.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Inorganic Chemistry I
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Inorganic Chemistry I > Chair Inorganic Chemistry I - Univ.-Prof. Dr. Josef Breu
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Inorganic Chemistry III
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Inorganic Chemistry III > Chair Inorganic Chemistry III - Univ.-Prof. Dr. Jürgen Senker
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 01 Dec 2014 11:29
Last Modified: 27 Sep 2023 08:47
URI: https://eref.uni-bayreuth.de/id/eprint/4276