PREPARATION OF SERIES SCHIFF BASES

Authors

  • Dr. Karim Jaber S Dr. Karim Jaber S Department of Chemistry, Faculty of Science, Najaf, Iraq

Abstract

This  paper  involved  preparation   of  two  types of  imine  compounds differ in the type of terminal group, where one of them has a terminal carboxyl group COOH   while the other contains methoxy  OCH3  as a terminal group. 

In the first part of this research it was Identification by spectroscopy methods using infrared IR and nuclear magnetic resonance H NMR spectrum, besides elemental analysis shows the exact chemical structure of the expected synthesized compounds. 
In the second part was the study of liquid-crystalline behavior by polarized optical microscopy POM and differential scanning calorimetry DSC that  showed a liquid crystal phase in the compounds that has odd number of carbon atoms in the terminal chain compounds in the first series, while the second series compounds showed liquid crystal phase in the   compounds that containing even number of atoms of carbon in the terminal chain. 

Keywords: heat, nod, schiff base

References

O. lehmann, "Liquid Crystal" ,Ber 1908; 41:3774

Maier W. and Saupe A.; Saupe "Eineeinf achemolekular etheorie des nematis chen kristallin flussigen zustandes". Z. Naturforsch. A (in German)1958.13: 564-566.

G.W.Gray," The Chemistry of Liquid Crystal ",Philosophical transaction of the society of London1983 ,series.A,Ch.1,p.77.

S.T.,L.K. ,Ong, S.T. Ong, G.Y. YeapandJ.P.W. Wong ., " Synthesis and mesomorphic properties of new Schiff base esters with different alkyl chains". Chin. Chem. Lett., 2009, 20: 767-770.

Anthony S. Travis "Manufacture and uses of the anilines: A vast array of processes and products" In ZviR appoport., The chemistry of Anilines 2007 Part 1. Wiley. p. 764. ISBN 978-0-470-87171-3.

A.I. Vogel , ''Practical Organic Chem. Longman "., FIFTH EDITION Group Ltd .,London , 1989.

G.W. Gray ,M. Hird ,D.L. acq and K.I.Toyne ,"behavior of organic compounds in liquid crystal phase " , Mol. Cryst. Liq. Cryst., 1989; 172,165.

Gehad G Mohamed, Mohamed Mohamed Omar ,Ahmed Mohamed Hindy ," Metal Complexes of Schiff Bases: Preparation, Characterization, and Biological Activity", Turk. J Chem, 2006; 30 , 361- 382

How to cite this article:

Dr. Karim Jaber S.; Preparation of series Schiff bases; Panacea Journal of Pharmacy and Pharmaceutical Sciences 2018:7(1);735-747.

Downloads

Published

2018-04-01

Issue

Section

Original Research Article