Abstract

Two molybdate complexes of Np(V) with Na⁺ cations in the outer sphere and NpO₂⁺ : MoO₄^2– = 1 : 2 of compositions Na₆[(NpO₂)₂(MoO₄)₄]·2H₂O (I) and Na₆[(NpO₂)₂(MoO₄)₄]·5H₂O (II) have been synthesized and structurally characterized. Two crystallographically independent Np(V) atoms have in both structures a coordination environment in the form of pentagonal bipyramids, the equatorial plane of which are formed by oxygen atoms of MoO₄^2– anions. Each structure has four independent MoO₄^2– anions, two of which are tridentate bridging and two are bidentate-bridging. The structure of I has a layered structure and in structure of II, the main structural motif is the anionic skeleton resulting from the inclusion into the composition of the compound a greater number of water molecules as compared with compound I.

中文翻译：

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Np（V）与NpO 2 +：MoO 4 2– = 1：2的钼酸盐络合物和外层的Na +阳离子

摘要

Np个（V）的二钼酸盐配合物用Na ⁺在外球阳离子和NPO ₂ ⁺：的MoO ₄ ^2- = 1：组合物的Na 2 ₆ - [（NPO ₂）₂（的MoO ₄）₄ ]·2H ₂ O（I）和Na ₆ [（NpO ₂）₂（MoO ₄）₄ ]·5H ₂ O（II）已合成并进行了结构表征。两个晶体学上独立的Np（V）原子在两个结构中均具有五角形双锥体形式的配位环境，其赤道面由MoO ₄ ^2-阴离子的氧原子形成。每个结构具有四个独立的MoO ₄ ^2-阴离子，其中两个是三齿桥连，两个是双齿桥连。I的结构具有层状结构，而在II的结构中，主要结构基序是与化合物I相比，由于在化合物的组合物中包含更多数目的水分子而形成的阴离子骨架。