Preparation and magnetic properties of some alkali-metal salts of chlorochromate(II) and chlorochromate(III) anions
- 1 January 1975
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 15,p. 1609-1614
- https://doi.org/10.1039/dt9750001609
Abstract
The preparation from melts of the chromium(II) compounds ACrCl3 and A2CrCl4(A = K or Cs) and two chromium(III) compounds K3CrCl6 and K3Cr2Cl9 are reported. The compounds ACrCl3 species are antiferromagnetic while the A2CrCl4 species are ferromagnetic and are examples of ferromagnets which are transparent in much of the visible region of the spectrum. The magnetic properties of the chromium(II) compounds are analysed on the basis of one- or two-dimensional nearest-neighbour Heisenberg models. K3Cr2Cl9 Shows evidence of antiferromagnetic exchange. Electronic spectra of some of the compounds are briefly described. Attempts to prepare analogous titanium(II) and vanadium(II) complexes were unsuccessful.Keywords
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