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Insight into Crystal Structures, Hirshfeld Surfaces and Fluorescent Properties of Multinuclear Co(II) and Ni(II) Salamo-Based Complexes Involving Lone Pair π-Interactions

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Abstract

Two multi-nuclear Co(II) and Ni(II) complexes, [{Co3(L)2(EtOH)2(μ-OAc)2}2]·2CH3CH2OH· CH2Cl2·CHCl3·CH3CN (1) and [{Ni3(L)2(EtOH)2(μ-OAc)2}2]·3CH2Cl2 (2) have been synthesized from asymmetric salamo-based polydentate chelating ligand (H2L) and Co(OAc)2·4H2O or Ni(OAc)2·4H2O, respectively, and characterized by elemental analyses, IR and UV-Vis spectra, and X-ray crystallography. Complexes 1 and 2 crystallize in monoclinic space groups as centrosymmetric structures. Also, complexes 1 and 2 can form two crystallographically independent but chemically identical molecular structures (molecules I and II) with M(II) (M = Co and Ni) atoms characterized by six-coordinated distorted octahedral geometries. The central M(II) atoms are located in the O6 coordination cavities, as well as the terminal M(II) atoms are located in N2O4 coordination environments. Lone pair π-interactions are involved in complexes 1 and 2 formation, and the intermolecular interactions have been quantitatively approached by Hirshfeld surfaces analysis. Fluorescence properties of the complexes have been studied.

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Funding

This work was supported by the National Natural Science Foundation of China (21761018), which is gratefully acknowledged.

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  1. School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, Gansu, China

    P. Li, Y.-T. La, L.-C. Feng & W.-K. Dong

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  1. P. Li
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  2. Y.-T. La
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Correspondence to W.-K. Dong.

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Li, P., La, YT., Feng, LC. et al. Insight into Crystal Structures, Hirshfeld Surfaces and Fluorescent Properties of Multinuclear Co(II) and Ni(II) Salamo-Based Complexes Involving Lone Pair π-Interactions. Russ J Gen Chem 91, 1409–1419 (2021). https://doi.org/10.1134/S1070363221070227

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