Exceptional uranium(VI)-nitride triple bond covalency from (15)N nuclear magnetic resonance spectroscopy and quantum chemical analysis.
Exceptional uranium(VI)-nitride triple bond covalency from (15)N nuclear magnetic resonance spectroscopy and quantum chemical analysis.
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从(15)N核磁共振光谱和量子化学分析中获得的异常铀(VI)-氮化物三键共价性。
DOI:
10.1038/s41467-021-25863-2
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发表时间:
2021-09-24
影响因子:
16.6
通讯作者:
Liddle ST
中科院分区:
文献类型:
--
作者:
Du J;Seed JA;Berryman VEJ;Kaltsoyannis N;Adams RW;Lee D;Liddle ST
Determining the nature and extent of covalency of early actinide chemical bonding is a fundamentally important challenge. Recently, X-ray absorption, electron paramagnetic, and nuclear magnetic resonance spectroscopic studies have probed actinide-ligand covalency, largely confirming the paradigm of early actinide bonding varying from ionic to polarised-covalent, with this range sitting on the continuum between ionic lanthanide and more covalent d transition metal analogues. Here, we report measurement of the covalency of a terminal uranium(VI)-nitride by 15N nuclear magnetic resonance spectroscopy, and find an exceptional nitride chemical shift and chemical shift anisotropy. This redefines the 15N nuclear magnetic resonance spectroscopy parameter space, and experimentally confirms a prior computational prediction that the uranium(VI)-nitride triple bond is not only highly covalent, but, more so than d transition metal analogues. These results enable construction of general, predictive metal-ligand 15N chemical shift-bond order correlations, and reframe our understanding of actinide chemical bonding to guide future studies. Determining the covalency of actinide chemical bonding is a fundamentally important challenge. Here, the authors report a 15N nuclear magnetic resonance spectroscopy study of a terminal uranium-nitride, revealing exceptional NMR properties and covalency that redefine 15N NMR parameter space and actinide chemical bonding.
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