On racemic and L-malates: A comparison of their crystal structures
- Author(s)
- Michel Fleck, Ekkehart Tillmanns, Ladislav Bohaty, P Held
- Abstract
The crystal structures of eight different L-malates have been determined and refined from single-crystal X-ray diffraction data. The compounds are the monoclinic (space group P21, Z = 2) L-malates Ca(C4H 4O5) ž 3 H2O (a = 6.652(1) A°, b = 8.378(1) A°, c = 8.268(1) A°, ß = 112.65(2)°, R = 0.027), Ni(C4H4O5) ž 3 H2O (a = 5.762(1)A°, b = 9.006(2) A°, c = 8.406(1) A°, ß = 105.54(1)°, R = 0.024), CuH2(C4H4O 5)2 (a = 9.911(1) A°, b = 5.271(1) A°, c = 11.510(1)A°, ß = 109.33(1)°, R = 0.031), CsH(C4H 4O5) ž H2O (a = 7.439(1) A°, b = 7.481(1) A°, c = 7.852(1) A°, ß = 116.61(1)°, R = 0.027) as well as the four isomorphic tetragonal (space group P412 12, Z = 4) L-malates MgH2(C4H4O 5)2 ž 4 H2O (a = 7.524(1) A°, c = 27.459(2) A°, R = 0.041), MnH2(C4H4O 5)2 ž 4 H2O (a = 7.548(1) A°, c = 27.707(2) A°, R = 0.027), CoH2(C4H4O 5)2 ž 4 H2O (a = 7.519(1) A°, c = 27.537(2) A°, R = 0.030) and ZnH2(C4H 4O5)2 ž 4 H2O (a = 7.533(1) A°, c = 27.360(2) A°, R = 0.029). A comparison of the atomic arrangements of L-malates with their racemic counterparts shows different aspects of symmetry as well as differences in the connectivity of the building units. In addition, for all the compounds, powder diffraction data were collected, analysed and submitted to the powder diffraction file (PDF).
- Organisation(s)
- Department of Mineralogy and Crystallography
- External organisation(s)
- Universität zu Köln
- Journal
- Zeitschrift für Kristallographie : international journal for structural, physical, and chemical aspects of crystalline materials
- Volume
- 219
- Pages
- 101-111
- No. of pages
- 11
- ISSN
- 0044-2968
- Publication date
- 2004
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 1051 Geology, Mineralogy
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/35920770-b987-46fd-b86d-2cb0b2ab6108