SYNTHESIS AND CRYSTAL STRUCTURE OF A ZINC

• Published in: Bulletin of the Chemical Society of Ethiopia Vol. 34; no. 2; p. 285
• Main Authors: Ntum, Sally-Judith E, Mainsah, Evans N, Mohamadou, Aminou, Raftery, James, O'Brien, Paul, Ndifon, Peter T
• Format: Journal Article
• Language: English
• Published: Chemical Society of Ethiopia 01-05-2020
• Subjects: Amino acids; Analysis; Crystal structure; Polymer industry; Polymers
• ISSN: 1011-3924
• DOI: 10.4314/bcse.v34i2.7

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