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Vol. 30 No. 9 (2018): Vol 30 Issue 9

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Synthesis and Spectroscopic Study of Some Transition Metal Complexes with New Pyrazolinone Ligand Derived from 2-Hydrazino Quinoxaline-3-one

https://doi.org/10.14233/ajchem.2018.21389
Mahmoud Najim Al-Jibouri
Department of Chemistry, College of Science, Mustansiriyah University, Baghdad, Iraq
Taghreed M. Musa
Department of Chemistry, College of Science, Mustansiriyah University, Baghdad, Iraq
Ahmad H. Ismail
Department of Chemistry, College of Science, Mustansiriyah University, Baghdad, Iraq

Corresponding Author(s) : Mahmoud Najim Al-Jibouri

mahmoud_inor71@uomustansiriyah.edu.iq; mahmoudnajim71@yahoo.com

Asian Journal of Chemistry, Vol. 30 No. 9 (2018): Vol 30 Issue 9

Abstract

New transition metal complexes of manganese(II), cobalt(II), nickel(II), copper(II) and zinc(II) with (E)-3-[4-(hydroxy(phenyl)methylene)-3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl]quinoxalin- 2(1H)one were synthesized and characterized by elemental analysis, FT-IR, NMR and mass spectra. The ligand was synthesized by the reaction of 2-hydrazinoquinoxaline-3(1H,4H)-one with 3-acetylcoumarin. All the metal complexes are found to be monomer in nature and have tetrahedral geometry. The IR spectra data revealed that the ligand behaves as neutral bidentate Lewis base through two nitrogen atoms of pyrazole and pyrazine moiety forming six-membered ring. The molar conductivity measurements suggested the neutral nature of all metal complexes in DMF solution. The magnetic moment measurements investigated the high spin properties of all the metal complexes.

Keywords

Transition metal(II) complexes Pyrazole Pyrazolinone
Al-Jibouri, M. N., Musa, T. M., & Ismail, A. H. (2018). Synthesis and Spectroscopic Study of Some Transition Metal Complexes with New Pyrazolinone Ligand Derived from 2-Hydrazino Quinoxaline-3-one. Asian Journal of Chemistry, 30(9), 2017–2021. https://doi.org/10.14233/ajchem.2018.21389
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