학술논문
SYNTHESIS AND CRYSTAL STRUCTURE OF A ZINC(II) COORDINATION POLYMER: N-(2-PYRIDYLMETHYL)-L-ALANINE)ISOTHIOCYANATE Zn(II)
Document Type
Academic Journal
Author
Source
Bulletin of the Chemical Society of Ethiopia. May 2020, Vol. 34 Issue 2, p285, 9 p.
Subject
Language
English
ISSN
1011-3924
Abstract
INTRODUCTION 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 [...]
The title compound, N-(2-pyridylmethyl)-L-alanine) zinc(II), [Zn([C.sub.10][H.sub.11][N.sub.3][O.sub.2]S)], 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, [.sup.1]H-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
The title compound, N-(2-pyridylmethyl)-L-alanine) zinc(II), [Zn([C.sub.10][H.sub.11][N.sub.3][O.sub.2]S)], 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, [.sup.1]H-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