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Structural Characterization of β-Glycolaldehyde Dimer

Vlasta Mohaček-Grošev   ORCID icon ; Center of Excellence for Advanced Materials and Sensing Devices, Ruđer Bošković Institute, Bijenička c. 54, 10000 Zagreb, Croatia
Biserka Prugovečki ; Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, 10000 Zagreb, Croatia
Stjepan Prugovečki ; Malvern Panalytical B.V., Lelyweg 1, 7602 EA Almelo, The Netherlands

Puni tekst: engleski, pdf (6 MB) str. 15-22 preuzimanja: 406* citiraj
APA 6th Edition
Mohaček-Grošev, V., Prugovečki, B. i Prugovečki, S. (2020). Structural Characterization of β-Glycolaldehyde Dimer. Croatica Chemica Acta, 93 (1), 15-22.
MLA 8th Edition
Mohaček-Grošev, Vlasta, et al. "Structural Characterization of β-Glycolaldehyde Dimer." Croatica Chemica Acta, vol. 93, br. 1, 2020, str. 15-22. Citirano 17.10.2021.
Chicago 17th Edition
Mohaček-Grošev, Vlasta, Biserka Prugovečki i Stjepan Prugovečki. "Structural Characterization of β-Glycolaldehyde Dimer." Croatica Chemica Acta 93, br. 1 (2020): 15-22.
Mohaček-Grošev, V., Prugovečki, B., i Prugovečki, S. (2020). 'Structural Characterization of β-Glycolaldehyde Dimer', Croatica Chemica Acta, 93(1), str. 15-22.
Mohaček-Grošev V, Prugovečki B, Prugovečki S. Structural Characterization of β-Glycolaldehyde Dimer. Croatica Chemica Acta [Internet]. 2020 [pristupljeno 17.10.2021.];93(1):15-22.
V. Mohaček-Grošev, B. Prugovečki i S. Prugovečki, "Structural Characterization of β-Glycolaldehyde Dimer", Croatica Chemica Acta, vol.93, br. 1, str. 15-22, 2020. [Online].

Structural characterization of the β-polymorph of glycolaldehyde dimer by powder X-ray diffraction, Raman and infrared spectroscopies is described. The previously described α-polymorph and the β-polymorph both crystallize in the monoclinic crystal system, space group P21/c, but with different cell parameters. There are no significant differences in the glycolaldehyde dimer molecular structure, the molecules in both polymorphs are trans-isomers with the hydroxyl groups in axial positions. The two polymorphs have a different arrangement of the glycolaldehyde dimer molecules. In the previously reported α-polymorph the molecules are arranged in hydrogen bonded layers parallel to (100) while in the β-polymorph the hydrogen bonded molecules are arranged in a three-dimensional network. Theoretically calculated Gibbs free energy as well as differential scanning calorimetry indicate β-polymorph to be the stable crystal phase of glycolaldehyde.

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Ključne riječi
glycolaldehyde dimer; crystal structure; Raman; infrared; X-ray powder diffraction; biodegradable polymer

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