Two novel nitrogen‐rich lanthanide compounds of 5,5'‐(azo bis)tetrazolide (ZT) were synthesized and structurally characterized. The dinuclear, isostructural compounds [Ce₂(ZT)₂CO₃(H₂O)₁₂] · 4 H₂O (1) and [Pr₂(ZT)₂CO₃(H₂O)₁₂]·4H₂O (2) were synthesized via two independent routes. Compound 1 was obtained after partial Lewis acidic decomposition of ZT by Ce^IV in aqueous solution of (NH₄)₂Ce(NO₃)₆ and Na₂ZT. Compound 2 was obtained by crystallization from aqueous solutions of Pr(NO₃)₃, Na₂ZT, and Na₂CO₃. By X‐ray diffraction analysis at 200 K, it was found that the trivalent lanthanide cations are bridged by a bidentate carbonato ligand and each cation is further coordinated by six H₂O ligands and one ZT ligand thus being ninefold coordinated.

中文翻译：

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通过它们的路易斯酸与5,5'-（Azobis）tetrazolide的化学稳定性之间的微妙相互作用控制早期镧系元素的络合行为

合成了5,5'-（偶氮 双）四唑啉（ZT）的两种新型富氮镧系元素化合物，并对其结构进行了表征。双核同构化合物[Ce ₂（ZT）₂ CO ₃（H ₂ O）₁₂ ] · 4 H ₂ O（1）和[Pr ₂（ZT）₂ CO ₃（H ₂ O）₁₂ ] · 4H ₂ O （2）是通过两条独立的途径合成的。Ce对ZT部分路易斯酸分解后得到化合物1^IV在（NH ₄）₂ Ce（NO ₃）₆和Na ₂ ZT的水溶液中。通过从Pr（NO ₃）₃，Na ₂ ZT和Na ₂ CO _3的水溶液中结晶获得化合物2。通过200 K的X射线衍射分析，发现三价镧系元素阳离子由二齿碳酸盐配体桥接，每个阳离子进一步由6个H ₂ O配体和1个ZT配体配位，因此被九倍配位。