Novel Hg(II) metal complexes of chelating phosphinopyridylamine and its selenide ligands: Synthesis, characterization, and X-ray structures

IF 2.1 3区化学 Q2 CHEMISTRY, ORGANIC

Tetrahedron Pub Date : 2025-07-10 DOI:10.1016/j.tet.2025.134810

Harbi Tomah Al-Masri , Ziad Moussa , Akram Ali Almejled

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Abstract

The reaction of 4-Me–C₅H₃N–2-NH(PPh₂) (1) and monooxidized selenoyl (4-CH₃)C₆H₃N-2-NH(P(Se)Ph₂) (2) ligands with HgX₂ (X = Cl, I) in acetone yielded the dimeric complexes [HgCl₂]₂[{1-κ²P,N}{1-κP}] (3) and [HgI₂{1-κ²P,N}]₂ (4), as well as [HgX₂{2-κ²Se,N^py}] (5, X = Cl; 6, X = I) derivatives. Complexes 3–6 were isolated and characterized utilizing multinuclear NMR (¹H, ¹³C, and ³¹P) and infrared spectroscopy. The molecular structures of compounds 1 and 3–6 were elucidated using single-crystal X-ray diffraction analysis. Complexes 3–6 constitute the first structurally defined complexes of these ligands with mercury metal identified to date. Dimer 3 is distinguished by the presence of Hg(II) metals exhibiting coordination numbers of five and four inside a single complex.

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螯合膦吡啶胺及其硒化物配体的新型汞（II）金属配合物：合成、表征和x射线结构

4- me - c5h3n -2- nh (PPh2)(1)和单氧化硒基（4- ch3）C6H3N-2-NH(P(Se)Ph2)(2)配体与HgX2 （X = Cl， I）在丙酮中反应得到二聚体配合物[HgCl2]2[{1-κ2P，N}{1-κP}](3)和[HgI2{1-κ2P，N}]2(4)，以及[HgX2{2 -κ2P， Npy}] (5, X = Cl；6, X = I)阶导数。利用多核磁共振（1H， 13C和31P）和红外光谱对配合物3-6进行了分离和表征。化合物1和3-6的分子结构通过单晶x射线衍射分析得到。配合物3-6构成了迄今为止鉴定的这些金属汞配体的第一个结构明确的配合物。二聚体3的特点是在单个配合物中存在配位数为5和4的汞（II）金属。

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来源期刊

Tetrahedron 化学-有机化学

CiteScore

3.90

自引率

4.80%

发文量

439

审稿时长

34 days

期刊介绍： Tetrahedron publishes full accounts of research having outstanding significance in the broad field of organic chemistry and its related disciplines, such as organic materials and bio-organic chemistry. Regular papers in Tetrahedron are expected to represent detailed accounts of an original study having substantially greater scope and details than that found in a communication, as published in Tetrahedron Letters. Tetrahedron also publishes thematic collections of papers as special issues and ''Reports'', commissioned in-depth reviews providing a comprehensive overview of a research area.