期刊
NATURE CHEMISTRY
卷 9, 期 9, 页码 850-855出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/NCHEM.2767
关键词
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资金
- Division of Chemical Sciences, Geosciences, and Biosciences, Office of Basic Energy Sciences of the US Department of Energy (DOE) [DE-SC0008479, USDOE/DESC002183]
- Office of Science of the US DOE [DE-AC02-05CH11231]
- NSF [DMR 1337296]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1337296] Funding Source: National Science Foundation
Actinyl species, [AnO(2)](2+), are well-known derivatives of the f-block because of their natural occurrence and essential roles in the nuclear fuel cycle. Along with their nitrogen analogues, [An(NR)(2)](2+), actinyls are characterized by their two strong trans-An-element multiple bonds, a consequence of the inverse trans influence. We report that these robust bonds can be weakened significantly by increasing the number of multiple bonds to uranium, as demonstrated by a family of uranium(VI) dianions bearing four U-N multiple bonds, [M](2)[U(NR)(4)] (M=Li, Na, K, Rb, Cs). Their geometry is dictated by cation coordination and sterics rather than by electronic factors. Multiple bond weakening by the addition of strong pi donors has the potential for applications in the processing of high-valent actinyls, commonly found in environmental pollutants and spent nuclear fuels.
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