期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 141, 期 23, 页码 9185-9190出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.9b04061
关键词
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资金
- U.S. National Science Foundation [CHE-1664928]
- University of Pennsylvania
- Center for Actinide Science and Technology (CAST), an Energy Frontier Research Center (EFRC) - U.S. Department of Energy, Office of Science, Basic Energy Sciences [DE-SC0016568]
- NSF [ACI-1548562]
- Vagelos Integrated Program in Energy Research (VIPER) of the University of Pennsylvania
A series of thorium(IV)-imido complexes was synthesized and characterized. Extensive experimental and computational comparisons with the isostructural cerium(IV)-imido complexes revealed a notably more covalent bonding arrangement for the Ce=N bond compared with the more ionic Th=N bond. The thorium-imido moieties were observed to be 3 orders of magnitude more basic than their cerium congeners. More generally, these results provide unique experimental evidence for the larger covalent character of 4f degrees 5d degrees Ce(IV) multiple bonds compared to its 5f degrees 6d degrees Th(IV) actinide congener.
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