Magnetic susceptibility of some organometallic compounds of neptunium (IV)

Stollenwerk, A.H.; Klenze, R.; Kanellakopulos, Β.

doi:10.1051/jphyscol:1979456

Cited by 2 publications

(2 citation statements)

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“…They discuss the crystal field splitting of the 4 I9/2 ground state of Np IV in the different complexes, and the possibility of a dimeric structure of the fluoride, which has very a different temperature dependance, and much higher values, of the magnetic susceptibility than the others. 76 For this study, the fluoride Np(Cp)3F was prepared from the iodide in a sold state synthesis,by treating the monchloride with an excess of NaF at 300 °C for 40 h, followed by a THF extraction of the product. from the reaction of NpCl4 with excess KCp in benzene solvent, Scheme 1c.…”

Section: Cyclopentadienyl and Substituted Cyclopentadienyl Ligands Npmentioning

confidence: 99%

“…Although it is not clear that the complexes have yet been fully characterized, variable-temperature magnetic analyses of a subset, Np(Cp) 3 X (X = F, Cl, Br, I, 1 / 2 SO 4 , Cp), were also undertaken. They discuss the crystal field splitting of the 4 I 9/2 ground state of Np IV in the different complexes and the possibility of a dimeric structure of the fluoride, which has very a different temperature dependence, and much higher values, of the magnetic susceptibility than the others . For this study, the fluoride Np(Cp) 3 F was prepared from the iodide in a solid-state synthesis, by treating the monochloride with an excess of NaF at 300 °C for 40 h, followed by a THF extraction of the product.…”

Section: Cyclopentadienyl and Substituted Cyclopentadienyl Ligandsmentioning

confidence: 99%

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Organometallic Neptunium Chemistry

2017

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Fifty years have passed since the foundation of organometallic neptunium chemistry, and yet only a handful of complexes have been reported, and even fewer have been fully characterized. Yet, increasingly, combined synthetic/spectroscopic/computational studies are demonstrating how covalently bonding, soft, carbocyclic organometallic ligands provide an excellent platform for advancing the fundamental understanding of the differences in orbital contributions and covalency in f-block metal-ligand bonding. Understanding the subtleties is the key to the safe handling and separations of the highly radioactive nuclei. This review describes the complexes that have been synthesized to date and presents a critical assessment of the successes and difficulties in their analysis and the bonding information they have provided. Because of increasing recent efforts to start new Np-capable air-sensitive inorganic chemistry laboratories, the importance of radioactivity, the basics of Np decay and its ramifications (including the radiochemical synthesis of one organometallic compound), and the available anhydrous starting materials are also surveyed. The review also highlights a range of instances in which important differences in the chemical behavior between Np and its closest neighbors, uranium and plutonium, are found.

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Section: Cyclopentadienyl and Substituted Cyclopentadienyl Ligands Npmentioning

confidence: 99%

Section: Cyclopentadienyl and Substituted Cyclopentadienyl Ligandsmentioning

confidence: 99%