Abstract
The title compound, N-(2-pyridylmethyl)-L-alanine) zinc(II), [Zn(C10H11N3O2S)], a coordination polymer derived from the mixed ligands, N-(2-pyridylmethyl)-L-alanine (HL1) and ammonium thiocyanide (L2) has been synthesized and characterized by IR spectroscopy, 1H-NMR, elemental analysis, thermogravimetric analysis and single crystal x-ray structure determination.The single crystal X-ray structure analysis of the title compoundreveals a molecular polymeric compound that crystallizes in the orthorhombic crystal system and P2(1)2(1)2(1) space group. The ligand acts as a bridge between adjacent zinc(II) centres, each of which adopts a five-coordinate geometry. Zinc bonds to two N atoms and one O atom of HL1, one N atom of L2 and one O atom of another HL1 ligand. This is confirmed by IR spectroscopy. Thermogravimetric analysis shows a one-step decomposition of the complex to leave a zinc sulfide residue.
 
 KEY WORDS: Zinc(II), N-(2-pyridylmethyl)-(L)-alanine) ligand, Isothiocyanate, Coordination polymer, Single crystal structure
 
 Bull. Chem. Soc. Ethiop. 2020, 34(2), 285-293
 DOI: https://dx.doi.org/10.4314/bcse.v34i2.7
Highlights
Schiff bases as a class of important ligands have been used extensively due to their versatile synthesis and good solubility in common solvents [1, 2]
Our recent focus has been on the synthesis of mixed ligand complexes involving tridentate reduced Schiff bases and the thiocyanate ion which exhibit versatile coordinating abilities [15, 16]
The synthesis, characterisation and x-ray crystal structure of a zinc(II) coordination polymer derived from ammonium thiocyanate and a reduced Schiff base mixed ligands
Summary
Schiff bases as a class of important ligands have been used extensively due to their versatile synthesis and good solubility in common solvents [1, 2]. Schiff bases have remarkable coordination ability and are able to form complexes with a variety of transition metals and stabilize various oxidation states [2,3,4]. Schiff bases and their metal complexes have been shown to have potential biological, medicinal, catalytic and industrial applications [3,4,5].
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