The Role of 2-Hydroxypyridine in the Formation of Pivalate Zn–Gd Complexes

IF 1.1 3区化学 Q4 CHEMISTRY, INORGANIC & NUCLEAR Russian Journal of Coordination Chemistry Pub Date : 2025-02-09 DOI:10.1134/S1070328424600839

M. E. Nikiforova, M. A. Kiskin, A. A. Sidorov, M. A. Uvarova, I. L. Eremenko

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Abstract

The reactions of [Zn(Piv)₂]_n and [Gd(Piv)₃]_n or Gd(NO₃)₃∙6H₂O with 2-hydroxypyridine (Hhp) or its 6-methyl derivative (Hmhp) afford heterometallic complexes [ZnGd(Рiv)₅(Hhp)₂]·0.5H₂O (I), [Zn₂Gd(Рiv)₆(Hhp)₂NO₃]∙2C₆H₆ (II), [Zn₃GdO(Рiv)₇(Hmhp)₂]∙MeCN (III), and [Zn₂Gd(Рiv)₆-(Hmhp)₂NO₃]∙0.5MeCN (IV), respectively. In the carboxylate metal cage of the synthesized complexes, the Hhp and Hmhp molecules in the form of 2-pyridone are coordinated by the metal atoms via the monodentate mode through the oxygen atoms. The introduction of Et₃N into the reaction with [Zn(Рiv)₂]_n, Gd(NO₃)₃∙6H₂O, and Hhp is found to result in the formation of compound [Zn₄Gd₂(OH)₂-(Рiv)₆(hp)₆(Hhp)₂] (V) in which the 2-hydroxypyridine anions perform the bridging function. The molecular structures of complexes I‒V are determined by XRD (CIF files CCDC nos. 2365419–2365423).

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2-羟基吡啶在私人酸锌-钆配合物形成中的作用

[Zn(Piv)2]n和[Gd(Piv)3]n或Gd(NO3)3∙6H2O与2-羟基吡啶（Hhp）或其6-甲基衍生物（Hmhp）反应，分别生成异金属络合物[ZnGd（Рiv）5(Hhp)2]∙0.5H2O (I)、[Zn2Gd（Рiv）6(Hhp)2NO3]∙2C6H6 （II）、[Zn3GdO（Рiv）7(Hmhp)2]∙MeCN （III）和[Zn2Gd（Рiv）6-(Hmhp)2NO3]∙0.5MeCN (IV)]。在所合成配合物的羧酸盐金属笼中，2-吡啶酮形式的Hhp和Hmhp分子与金属原子通过氧原子以单齿模式配位。在与[Zn（Рiv）2]n、Gd(NO3)3∙6H2O和Hhp的反应中引入Et3N可生成化合物[Zn4Gd2(OH)2-（Рiv）6(hp)6(Hhp)2] (V)，其中2-羟基吡啶阴离子起桥接作用。配合物I-V的分子结构由XRD测定（CIF文件CCDC编号2365419-2365423）。

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来源期刊

Russian Journal of Coordination Chemistry 化学-无机化学与核化学

CiteScore

2.40

自引率

15.80%

发文量

审稿时长

7.2 months

期刊介绍： Russian Journal of Coordination Chemistry is a journal that publishes reviews, original papers, and short communications on all aspects of theoretical and experimental coordination chemistry. Modern coordination chemistry is an interdisciplinary science that makes a bridge between inorganic, organic, physical, analytical, and biological chemistry.