Synthesis and structural characterization of two heterodinuclear Zn^II-Ln^III complexes with the formula [ZnLn(HL)(µ-OAc)(NO₃)₂(H₂O)_x(MeOH)_1-x]NO₃ · n H₂O · n MeOH [Ln = Pr (1), Nd (2)] and the crystal and molecular structure of [ZnNd(HL)(µ-OAc)(NO₃)₂(H₂O)] [ZnNd(HL)(OAc)(NO₃)₂(H₂O)](NO₃)₂ · n H₂O · n MeOH (3) are reported. The asymmetrical compartmental ligand (E)-2-(1-(2-((2-hydroxy-3-methoxybenzylidene)amino)-ethyl)imidazolidin-2-yl)-6-methoxyphenol (H₂L) is formed from N¹,N³-bis(3-methoxysalicylidene)diethylenetriamine (H₂valdien) through intramolecular aminal formation, resulting in a peripheral imidazoline ring. The structures of 1–3 were revealed by X-ray crystallography. The smaller Zn^II ion occupies the inner N₂O₂ compartment of the ligand, whereas the larger and more oxophilic Ln^III ions are found in the outer O₂O₂’ site.

Graphic Abstract

Synthesis and structural characterization of two heterodinuclear Zn^II-Ln^III complexes (Ln = Pr, Nd) bearing an asymmetrical compartmental ligand formed in situ from N¹,N³-bis(3-methoxysalicylidene)diethylenetriamine (H₂valdien) through intramolecular aminal formation are reported.

中文翻译：

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异双核 ZnII-LnIII 配合物 (Ln = Pr, Nd) 与环收缩 H2valdien 衍生的席夫碱配体的结构表征

两种异双核Zn ^II -Ln ^III配合物的合成和结构表征[ZnLn(HL)(µ-OAc)(NO ₃ ) ₂ (H ₂ O) _x (MeOH) _1-x ]NO ₃ · n H ₂ O· n MeOH [Ln = Pr ( 1 ), Nd ( 2 )]和[ZnNd(HL)(μ-OAc)(NO ₃ ) ₂ (H ₂ O)] [ZnNd(HL) ]的晶体和分子结构(OAc)(NO ₃ ) ₂ (H ₂ O)](NO ₃ ) ₂ ·报道了n H ₂ O· n MeOH ( 3 )。不对称区室配体 ( E )-2-(1-(2-((2-羟基-3-甲氧基亚苄基)氨基)-乙基)咪唑啉-2-基)-6-甲氧基苯酚(H ₂ L)由N形成^{如图1所示}，N ^{3 -}双(3-甲氧基水杨亚基)二亚乙基三胺(H ₂ valdien)通过分子内胺醛形成，产生外围咪唑啉环。的结构1 - 3通过X射线晶体学显示。较小的 Zn ^II离子占据内部 N ₂ O ₂配体的隔室，而更​​大和更亲氧的 Ln ^III离子位于外部 O ₂ O ₂ ' 位点。

图形摘要

两个异双核Zn ^II -Ln ^III配合物 (Ln = Pr, Nd) 的合成和结构表征，其带有由N ¹ , N ^{3 -}双（3-甲氧基水杨烯）二亚乙基三胺（H ₂ valdien）通过分子内胺醛原位形成的不对称区室配体形成的报道。