Synthesis, characterization and X-ray crystal structures of two non-molecular coordination polymers of manganese(II) and copper(II) with N-(2-pyridylmethyl)-l-alanine and isothiocyanato ligands

Abstract : The reduced Schiff base, N-(2-pyridylmethyl)-l-alanine (Pyala), has been prepared and used as a ligand for the synthesis of two new non-centrosymmetrical isothiocyanate mixed-ligand coordination polymers, [MnPyalaSCN] n and [CuPyalaSCN] n . Pyala and the metal complexes were characterized by physico-chemical and spectroscopic methods. The single-crystal X-ray structures of the complexes reveal both compounds to be non-molecular coordination polymers which crystallize in the orthorhombic system. The ligand acts as a bridge between two metal centres in both compounds, forming two six-membered rings around each Mn atom and two five-membered rings around each Cu centre. The 1D chains are assembled via N–H⋯O, N–H⋯S hydrogen bonds and S–S interactions building 3D helical supramolecular networks in both compounds. Packing of the polymers of both compounds along the b-axis gives chiral channels.
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https://hal.univ-reims.fr/hal-01889374
Contributor : Aminou Mohamadou <>
Submitted on : Saturday, October 6, 2018 - 1:37:52 PM
Last modification on : Friday, January 10, 2020 - 3:42:19 PM

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Sally-Judith Ntum, Bridget Ndosiri, Aminou Mohamadou, Jérôme Marrot, Moise Agwara, et al.. Synthesis, characterization and X-ray crystal structures of two non-molecular coordination polymers of manganese(II) and copper(II) with N-(2-pyridylmethyl)-l-alanine and isothiocyanato ligands. Transition Metal Chemistry, Springer Verlag, 2016, 41 (8), pp.889 - 896. ⟨10.1007/s11243-016-0091-y⟩. ⟨hal-01889374⟩

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