Abstract We present the synthesis of the tridentate Schiff base 2-(1-((pyridine-2-ylmethyl)imino)ethyl)naphtalen-1-ol (LH) providing a NNO coordination environment. Two new Ni(II) and Cu(II) complexes with a ligand to metal stoichiometric ratio of 1:1 and 2:1, respectively, were synthesized from LH. The Cu(II) complex of general formula [Cu(L)(MeOH)](ClO4)·MeOH (2) has a square planar geometry in the central ion completed by a MeOH molecule. In the case of the mononuclear Ni(II) complex [NiL2]·MeOH (3) the central ion has a distorted octahedral geometry. These new compounds were structurally, spectroscopically and electrochemically characterized using X-ray diffraction, UV-vis, IR, 1H NMR, 13C NMR spectroscopies, and cyclic voltammetry. LH is electroactive in the potential window of −1.0 to 1.0 V with one irreversible oxidation at 0.44 V, a quasi-reversible oxidation at 0.60 V, and one irreversible reduction at 0.24 V. For 2, there is a quasi-reversible oxidation at 0.43 V and one irreversible oxidation at 0.64 V. Complex 3 has two quasi-reversible oxidations at 0.19 V and at 0.58 V, one irreversible oxidation at 0.37 V, and one irreversible reduction at 0.38 V. DFT calculations were undertaken to obtain optimized structures and relative stability for 2 and 3 and their intermediates.

中文翻译：

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来自 2-(1-((pyridine-2-ylmethyl)imino)ethyl)naphtalen-1-ol 的两种新的 Cu(II) 和 Ni(II) 配合物的合成、结构、电化学和光谱表征以及理论计算

摘要 我们介绍了三齿席夫碱 2-(1-((pyridine-2-ylmethyl)imino)ethyl)naphtalen-1-ol (LH) 的合成，提供了 NNO 配位环境。从 LH 合成了两种新的 Ni(II) 和 Cu(II) 配合物，配体与金属的化学计量比分别为 1:1 和 2:1。通式 [Cu(L)(MeOH)](ClO4)·MeOH (2) 的 Cu(II) 配合物在由 MeOH 分子完成的中心离子中具有方形平面几何形状。在单核 Ni(II) 配合物 [NiL2]·MeOH (3) 的情况下，中心离子具有扭曲的八面体几何形状。使用 X 射线衍射、UV-vis、IR、1H NMR、13C NMR 光谱和循环伏安法对这些新化合物进行了结构、光谱和电化学表征。LH 在 -1.0 至 1.0 V 的电位窗口内具有电活性，在 0.44 V 处发生不可逆氧化，