Supramolecular architectures with ladder and lamellar topologies using metal-ligand coordination units via C-H•••Cl and O-H•••Cl hydrogen bonding

New Mn-II/Cu-II/Zn-II complexes f(L-1)MnCl2] (1), [(L-2)CuCl2]-0.5H(2)O (2) and [(L-2)ZnCI(H2O)[lCO(4)] (3), containing (2-pyridyl)aikylamine ligands, N-methylN,N-bis(2-pyridylmethyl)amine (L-2) and methy][2-(2pyridyl)ethyl](2-pyridylmethyl)amine (L-2), 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 center dot center dot center dot Cl and weak (however, multiple) C-H center dot center dot center dot 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.