European Journal of Chemistry

Synthesis and characterization of manganese(II), cobalt(II), nickel(II), copper(II) and zinc(II) complexes with new Schiff base derived from 6,7-dimethyl-quinoxaline-2,3(1H,4H)-dione and thiosemicarbazide

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Published: Mar 31, 2015
DOI: https://doi.org/10.5155/eurjchem.6.1.44-47.1140
Keywords:
Schiff base, Quinoxaline, Benzopyrazine, Thiosemicarbazone, Quinoxalin-2, 3-dione, Transition metal complexes
Section
Research Article
Issue
Vol. 6 No. 1 (2015): March 2015
Dates
Received 2014-09-01
Accepted 2014-09-26
Published 2015-03-31


Main Article Content

Mahmoud Najim Al-Jibouri
Department of Chemistry, College of Science, Al-Mustansiriya University, Baghdad, 964, Iraq
Saad Mohammad Hasun
Department of Chemistry, College of Science, Al-Mustansiriya University, Baghdad, 964, Iraq

Abstract

New transition metal complexes of quinoxaline-2,3-dione-thiosemicarbazone ligand were prepared and characterized by elemental analysis, 1H and 13C NMR spectroscopy. The ligand (LH) was obtained by the reaction of 6,7-dimethyl-quinoxaline-2,3(1H,4H)-dione with thiosemicarbazide. All the complexes are found to be monomer in nature and have tetrahedral geometry. The IR spectra data revealed that the new Schiff base behaved as monobasic tridentate ligand through deprotonation of thiol-SH group, oxygen atom of C=O of pyrazine moiety and nitrogen atom of azomethine -C=N- group. However, the molar conductivity measurements proved the neutral nature of all metal complexes in DMSO solution, as well as the magnetic moment measurements investigated the high spin properties of all complexes.


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Al-Jibouri, M. N.; Hasun, S. M. Synthesis and Characterization of manganese(II), cobalt(II), nickel(II), copper(II) and zinc(II) Complexes With New Schiff Base Derived from 6,7-Dimethyl-Quinoxaline-2,3(1H,4H)-Dione and Thiosemicarbazide. Eur. J. Chem. 2015, 6, 44-47.

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