Covalency in Actinide Compounds.
| Autor: | Pace KA; Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter St., Columbia, SC, 29208, USA., Klepov VV; Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter St., Columbia, SC, 29208, USA., Berseneva AA; Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter St., Columbia, SC, 29208, USA., Zur Loye HC; Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter St., Columbia, SC, 29208, USA. |
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| Jazyk: | angličtina |
| Zdroj: | Chemistry (Weinheim an der Bergstrasse, Germany) [Chemistry] 2021 Apr 01; Vol. 27 (19), pp. 5835-5841. Date of Electronic Publication: 2021 Jan 31. |
| DOI: | 10.1002/chem.202004632 |
| Abstrakt: | Covalency in actinides has emerged as a resounding research topic on account of the technological importance in separating minor actinides from lanthanides for spent nuclear fuel processing, and utilization of their distinct bonding properties has been realized as a route towards overcoming this challenge. Because of the limited radial extent of the 4f orbitals, there is almost no 4f electron participation in bonding in lanthanides; this is not the case for the actinides, which have extended 5f orbitals that are capable of overlapping with ligand orbitals, although not to the degree of overlap as in the d orbitals of transition metals. In this concept paper, a general description of covalency in actinide compounds is provided. After introducing two main approaches to enhance covalency, either by exploiting increased orbital overlap or decreasing energy differences between the orbitals causing orbital energy degeneracy, the current state of the field is illustrated by using several examples from the recent literature. This paper is concluded by proposing the use of actinide chalcogenides as a convenient auxiliary tool to study covalency in actinide compounds. (© 2020 Wiley-VCH GmbH.) |
| Databáze: | MEDLINE |
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