Syntheses, Crystal Structures and an Overview of Alkali Metal Maleates
- Autor(en)
- Michel Fleck, Ladislav Bohaty
- Abstrakt
The crystal structures of four alkali salts of maleic acid have been determined by single crystalX-ray diffraction: crystals of rubidium hydrogen maleate, RbH(C4H2O4), are very nearly centrosymmetrical,i. e., only one hydrogen atom position in the crystal structure violates the centrosymmetry.Thus, the space group is Pbc21 rather than Pbcm. The compound is isotypic with potassium hydrogenmaleate, KH(C4H2O4), which has previously been described in space group Pbcm. It has beenreinvestigated to prove that the correct space group is also Pbc21. The isotypic pair of rubidiumhydrogen maleate maleic acid, RbH(C4H2O4) H2(C4H2O4), and caesium hydrogen maleate maleicacid, CsH(C4H2O4)H2(C4H2O4), crystallise in the triclinic space group P¯1. The geometry of themaleate units in these compounds corresponds well to data of other metal maleates. The only significantvariation, concerning the intra-anionic hydrogen bond, is discussed. Furthermore, an overviewof previously reported metal maleate structures is given, with special regard to the symmetry of theintramolecular hydrogen bond.
- Organisation(en)
- Institut für Mineralogie und Kristallographie
- Externe Organisation(en)
- Universität zu Köln
- Journal
- Zeitschrift für Naturforschung. Section B: A Journal of Chemical Sciences
- Band
- 64 b
- Seiten
- 517-524
- Anzahl der Seiten
- 8
- ISSN
- 0932-0776
- Publikationsdatum
- 2009
- Peer-reviewed
- Ja
- ÖFOS 2012
- 105113 Kristallographie
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/acd86267-8a56-42a7-8039-ff60263a3fbf