Exchange interaction in polynuclear complexes. Part 3. Experimental study and theoretical interpretation of the antiferromagnetic coupling in di-µ-oxo-octaoxodichromate(III); comparison with tri-µ-chloro-hexachlorodichromate(III)
- 1 January 1977
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 15,p. 1453-1457
- https://doi.org/10.1039/dt9770001453
Abstract
The temperature dependence of the magnetic susceptibility of the new material Cr2Te4O11 has been studied in the range 4.2–300 K. The compound contains the binuclear anion [Cr2O12]14– as isolated units, resulting from sharing of an edge between two CrO6 octahedra. The exchange-interaction parameter J of the H.D.V.V. Hamiltonian –JŜAŜB is equal to –6 ± 0.5 cm–1. In the framework of a previously described model for the exchange interaction and using the iterative extended-Hückel method, the antiferromagnetic contribution of the exchange interaction has been calculated. A slmllar calculation has been carried out for the binuclear anion [Cr2Cl9]3–. Comparison of the results for both compounds shows that our model leads to the relative magnitude of the exchange interaction in cases of antiferromagnetlc coupling.Keywords
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