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Crystallization of colourless hexanitratoneptunate(iv) with anhydrous H+ countercations trapped in a hydrogen bonded polymer with diamide linkers

机译:用无水H +反应的无色六硝基替肽(IV)结晶,捕获氢键聚合物与酰胺接头

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摘要

Colourless crystalline compounds of centrosymmetric [Np(NO3)(6)](2-) were yielded from 3 M HNO3 aq in the presence of double-headed 2-pyrrolidone derivatives (L). In the obtained crystal structures, H+ was also involved as a countercation to compensate for the negative charge of [Np(NO3)(6)](2-), where the initial hydration around H+ was fully removed during crystallization despite it having the strongest hydration enthalpy. Instead, this anhydrous H+ was captured by L to form a [H+MIDLINE HORIZONTAL ELLIPSISL](n) hydrogen bonded polymer. In [Np(NO3)(6)](2-), the Np4+ centre is twelve-coordinated with 6 bidentate NO3-, and therefore, present in an icosahedral geometry bearing inversion centre. In such a centrosymmetric system, any f-f transitions stemming from the 5f(3) electronic configuration of Np4+ are electric-dipole forbidden. This is the reason why the compounds currently obtained were colourless unlike ordinary Np(iv) species, which are olive-green.
机译:在双头2-吡咯烷酮衍生物(L)存在下,在3M HNO3水溶液中产生无色晶体化合物[NP(NO3)(6)](2-)。 在所获得的晶体结构中,H +也涉及到补偿[NP(NO 3)(6)](2-)的负电荷,其中在结晶期间完全除去H +周围的初始水合物,尽管它具有最强的 水合焓。 相反,通过L捕获该无水H +以形成[H +中线水平椭圆形SIS1](n)氢键聚合物。 在[NP(NO3)(6)](2-)中,NP4 +中心具有12个配位,其具有6个二齿NO3-,因此存在于ICOSAHEDRAL几何轴承反转中心中。 在这样的离心系统中,从5F(3)的NP4 +的电子配置源的任何F-F转换都是禁止电偶极子。 这就是为什么当前获得的化合物与普通的NP(IV)物种不同,这是橄榄绿的。

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  • 来源
    《RSC Advances》 |2020年第10期|共6页
  • 作者单位

    Tokyo Inst Technol Inst Innovat Res Lab Adv Nucl Energy Meguro Ku 2-12-1 N1-32 O Okayama Tokyo 1528550 Japan;

    HZDR Inst Resource Ecol Bautzner Landstr 400 D-01328 Dresden Germany;

    Tokyo Inst Technol Inst Innovat Res Lab Adv Nucl Energy Meguro Ku 2-12-1 N1-32 O Okayama Tokyo 1528550 Japan;

    Tokyo Inst Technol Inst Innovat Res Lab Adv Nucl Energy Meguro Ku 2-12-1 N1-32 O Okayama Tokyo 1528550 Japan;

    Tokyo Inst Technol Inst Innovat Res Lab Adv Nucl Energy Meguro Ku 2-12-1 N1-32 O Okayama Tokyo 1528550 Japan;

    Tokyo Inst Technol Inst Innovat Res Lab Adv Nucl Energy Meguro Ku 2-12-1 N1-32 O Okayama Tokyo 1528550 Japan;

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  • 正文语种 eng
  • 中图分类 化学;
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