Single-crystal magnetic properties of lanthanide complexes. Part II. Tri-iodohexakis(antipyrine)cerium
- 1 January 1970
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc. A
- p. 3040-3050
- https://doi.org/10.1039/j19700003040
Abstract
The principal magnetic moments of tri-iodohexakis(antipyrine)cerium (antipyrine is 2,3-dimethyl-1-phenyl-Δ3-pyrazolin-5-one) crystals have been determined in the temperature range 300–90 K. They are interpreted within a free-ion f1 basis perturbed by spin–orbit coupling and a crystal-field of D3d symmetry. The general behaviours of theoretical energy levels, magnetic moments, and e.s.r. g-values are examined as functions of second-, fourth- and sixth-order radial integrals and of geometry. Experimental susceptibilities are fitted to the model as well as previously reported g-values. The parameter values deduced and their correlations with the orbital reduction factor are discussed and compared with those from the ytterbium analogue and with elementary point-charge and point-dipole crystal-field calculations.Keywords
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