Abstract

New zinc bis-o-semiquinolate complexes based on 3,5-di-tert-octyl-o-benzoquinone bearing the N-donor ligand (pyrazine) coordinated to the metal are synthesized. Two different products can be obtained depending on the synthesis method: coordination polymer (direct oxidation of metallic zinc with o-quinone (CIF file CCDC no. 2250574 (I)) or polynuclear cluster (exchange reaction (CIF file CCDC no. 2250575 (II)). The coordination polymer is linear and free of intermolecular π,π interactions between the aromatic fragments of the adjacent molecules. The magnetochemical study of complexes I and II shows that intramolecular antiferromagnetic exchange interactions between spins of the o-semiquinolate radical centers dominate.

中文翻译：

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配位聚合物或簇：双(3,5-二叔辛基半喹啉)锌与吡嗪

摘要

合成了基于 3,5-二叔辛基-邻苯醌的新型双邻半喹啉锌配合物，其带有与金属配位的 N-供体配体（吡嗪）。根据合成方法的不同，可以得到两种不同的产物：配位聚合物（金属锌与邻醌直接氧化（CIF文件CCDC no.2250574（I））或多核簇（交换反应（CIF文件CCDC no.2250575（II ）） )). 配位聚合物是线性的，并且相邻分子的芳香片段之间不存在分子间 π,π 相互作用。配合物 I 和 II 的磁化学研究表明，邻半喹啉自由基中心自旋之间的分子内反铁磁交换相互作用占主导地位。