Structural Investigation of Magnesium Complexes Supported by a Thiopyridyl Scorpionate Ligand.

Structural Investigation of Magnesium Complexes Supported by a Thiopyridyl Scorpionate Ligand.
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由硫吡啶基半角酯配体支持的镁复合物的结构研究。

DOI:
10.3390/molecules27144564
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发表时间:
2022-07-18
期刊:
Molecules (Basel, Switzerland)
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本文报道了一系列以蝎形配体三(2-吡啶硫基)甲烷(Tptm)稳定的杂配镁配合物的合成。通过前配体与选择的格氏试剂的质子化反应,得到通式为[Mg(Tptm)(X)](1-X; X = Cl,Br,I)的化合物。尝试分离钾衍生物K(Tptm)导致Tptm分解并形成烯烃(C5 H4 N-S)2C=C(C5 H4 N-S)2,并且这种降解也使用DFT方法建模。用K(CH 2 Ph)处理化合物1-I,得到降解产物[Mg(Bptm)2](2; Bptm = {CH(S-C5 NH3)2}-)。我们分析和量化的Tptm配体的空间性质,使用在这项研究中得到的化合物的结构信息配对与埋体积计算,还添加HTptm和其CF 3取代的同系物(HTptmCF 3)的结构数据。这些研究突出了这种配体支架的高度灵活性及其稳定各种配位基序和几何形状的能力,这是新型有机金属试剂和催化剂设计中非常理想的特征。
Herein, we report the synthesis of a series of heteroleptic magnesium complexes stabilized with the scorpionate ligand tris(2-pyridylthio)methanide (Tptm). The compounds of the general formula [Mg(Tptm)(X)] (1-X; X = Cl, Br, I) were obtained via protonolysis reaction between the proligand and selected Grignard reagents. Attempts to isolate the potassium derivative K(Tptm) lead to decomposition of Tptm and formation of the alkene (C5H4N-S)2C=C(C5H4N-S)2, and this degradation was also modelled using DFT methods. Compound 1-I was treated with K(CH2Ph), affording the degradation product [Mg(Bptm)2] (2; Bptm = {CH(S-C5NH3)2}−). We analyzed and quantified the steric properties of the Tptm ligand using the structural information of the compounds obtained in this study paired with buried volume calculations, also adding the structural data of HTptm and its CF3-substituted congener (HTptmCF3). These studies highlight the highly flexible nature of this ligand scaffold and its ability to stabilize various coordination motifs and geometries, which is a highly desirable feature in the design of novel organometallic reagents and catalysts.
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发表时间: 2015-01-02
影响因子: 16.6
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影响因子: 21.8
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影响因子: 2.8
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