Supramolecular architectures with ladder and lamellar topologies using metal-ligand coordination units via C–H···Cl and O–H···Cl hydrogen bonding |
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Authors: | V Balamurugan Jhumpa Mukherjee Maninder Singh Hundal Rabindranath Mukherjee |
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Institution: | (1) Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India;(2) Department of Chemistry, Guru Nanak Dev University, Amritsar, 143005, India |
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Abstract: | New MnII/CuII/ZnII complexes (L1)MnCl2] (1), (L2)CuCl2]·0.5H2O (2) and (L2)ZnCl(H2O)]ClO4] (3), containing (2-pyridyl)alkylamine ligands, N-methyl-N,N-bis(2-pyridylmethyl)amine (L1) and methyl2-(2-pyridyl)ethyl](2-pyridylmethyl)amine (L2), have been prepared and characterized, including X-ray crystallography. The most striking feature of the structures of these
complexes is the formation of molecular ladder and lamellar topology through the crystal packing arrangement, determined by
both strong O–H···Cl and weak (however, multiple) C–H···Cl hydrogen-bonding interactions, to maintain the neutral/cationic
metal-ligand coordination units linked to each other. In 3, additional secondary interactions are observed involving coordinated solvent and the counter-ion. The results presented
here demonstrate that (i) the choice of organic ligands to provide flexibility and inherent potential to participate in hydrogen-bonding
interactions, (ii) the coordination geometry preferences of metal ions, (iii) the number of metal-bound chloride ion and (iv)
the presence of solvent/counter-anion have a great influence on supramolecular network topology. |
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Keywords: | (2-Pyridyl)alkylamine ligands Crystal structures Mn(II) Cu(II) and Zn(II) complexes C– H···Cl and O– H···Cl hydrogen bonding Ladder and lamellar topologies |
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