Single-crystal magnetic properties of lanthanide complexes. Part IV. Tri-iodohexakis(antipyrine)neodymium(III)
- 1 January 1971
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc. A
- p. 2612-2616
- https://doi.org/10.1039/j19710002612
Abstract
The principal magnetic moments of crystals of tri-iodohexakis(antipyrine)neodymium(III)(antipyrine is 2,3-dimethyl-1-phenyl-Δ3-pyrazolin-5-one) have been measured in the temperature range 300–90 K. These are interpreted within a free-ion f3,4l term as basis, perturbed by a crystal field of D3d symmetry. The point-charge potential leads to second-, fourth-, and sixth-order radial parameters ρ2, ρ4, and ρ6, and θ, the effective angle subtended by any metal–oxygen bond and the three-fold symmetry axis. Mean moments fix ρ4 and ρ6 as 700 ± 200 cm–1 and 425 ± 50 cm–1, respectively. Magnetic anisotropies set ranges for A2 0〈r2〉, related to the coefficient of the second-order potential, as 140–220 cm–1 at 300 K and 200–350 cm–1 at 100 K. These ranges depend on ρ2, a property not shared by the magnetic properties of the cerium, terbium, or ytterbium analogues.Keywords
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