Synthesis, structural characterization and thermal properties of three copper(II) complexes based on aryl hydrazide ligands |
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Authors: | Ming-Li Liu Jian-Min Dou Da-Cheng Li Da-Qi Wang Jian-Zhong Cui |
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Institution: | (1) Department of Chemistry, Tianjin University, Tianjin, 300072, People’s Republic of China;(2) Department of Chemistry, Liaocheng University, Liaocheng, 252053, People’s Republic of China; |
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Abstract: | The thiosemicarbazide and hydrazide Cu(II) complexes, Cu3L21(py)4Cl2] (1), Cu(HL2)py] (2) and Cu(HL3)py] (3), (H2L1 = 1-picolinoylthiosemicarbazide, H3L2 = N′-(2-hydroxybenzylidene)-3-hydroxy-2-naphthohydrazide, H3L3 = 2-hydroxy-N′-((2-hydroxy-naphthalen-1-yl)methylene)benzohydrazide) have been prepared and characterized through physicochemical and spectroscopic
methods as well as X-ray crystallography. Complex 1 has a centrosymmetric structure with –N–N– bridged Cu3 skeleton. Neighboring molecules are linked into a 3D supermolecular framework by π–π stacking interactions, N–H···Cl and
C–H···Cl hydrogen bonds. Complexes 2 and 3 have similar planar structures but different dimers formed by concomitant Cu···N and Cu···O interactions, respectively. Solvent
accessible voids with a volume of 391 ?3 are included in the structure of complex 2, indicating that this complex is a potential host candidate. Thermogravimetric analysis shows that the three complexes are
stable up to 100 °C. |
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