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- Title
Morphological and Thermal Investigations of the 'Active' Dimer Hydroxide of Chromium(III).
- Authors
Spiccia, Leone; Marty, Werner; Giovanoli, Rudolf
- Abstract
The 'active' dimer hydroxide, [Cr2(μ-OH)2(OH)4(OH2)4]·2 H2O, has been characterised by means of IR spectroscopy, thermal analysis, X-ray powder diffraction, and electron microscopy. Thermogravimetric measurements and the Cr content of the hydroxide are in agreement with this composition. The IR spectrum supports the notion that this hydroxide is composed of unaltered dimer fragments linked through hydrogen bonds of ca. 2.8 Å. The compound is microcrystalline in nature with an X-ray powder diffraction pattern distinctly different from that of the isomeric 'active' monomer hydroxide. Electron micrographs of the 'active' dimer hydroxide indicate that this material consists of platelets the sie of which is dependent on the pH of precipitation.
- Publication
Helvetica Chimica Acta, 1987, Vol 70, Issue 7, p1737
- ISSN
0018-019X
- Publication type
Article
- DOI
10.1002/hlca.19870700709