

Synthesis, characterization and thermochemistry of piperazine complexes of bivalent metal bromides
Pedro Oliver Dunstan (1,*)


(1) Instituto de Quimica, Universidade Estadual de Campinas, C. P. 6154, 13084-971, Campinas, Sao Paulo, Brazil
(2) Instituto de Quimica, Universidade Estadual de Campinas, C. P. 6154, 13084-971, Campinas, Sao Paulo, Brazil
(*) Corresponding Author
Received: 03 Apr 2013 | Revised: 27 May 2013 | Accepted: 03 Jun 2013 | Published: 30 Sep 2013 | Issue Date: September 2013
Abstract
Complexes of bivalent metal bromides with piperazine were prepared in hot ethanol solution. They have the general formula: [MBr2(pipz)n], where M = Mn(II), Fe(II), Co(II), Ni(II), Cu(II) or Zn(II); pipz = piperazine; n = 1 or 1.5. They were characterized by melting point measurements, elemental analysis, TG/DTG-DSC curves, IR and electronic spectroscopy. The enthalpies of solution of the complexes, salts and ligand were measured by thermo-chemical cycles and several thermochemical parameters were determined. The mean standard enthalpies of the metal-nitrogen coordinated bonds and the enthalpies of gaseous complex formation were also determined.

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DOI: 10.5155/eurjchem.4.3.250-254.791
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TWAS (The Academy of Sciences for the Developing World) and CNPq (Conselho Nacional de Pesquisa)
Citations
[1]. Rishi Kant, Tanjot Kaur, Zanib Hilal, Nidhi Aggarwal, Suman Maji
Synthesis and characterization of a series of phenyl piperazine based ligands
Journal of Physics: Conference Series 1531(1), 012106, 2020
DOI: 10.1088/1742-6596/1531/1/012106

[2]. Rishi Kant, Suman Maji
Recent advances in the synthesis of piperazine based ligands and metal complexes and their applications
Dalton Transactions 50(3), 785, 2021
DOI: 10.1039/D0DT03569F

[3]. Rishi Kant, Suman Maji
Synthesis, characterization and biological evaluation of piperazine embedded copper complexes
Inorganica Chimica Acta 552, 121515, 2023
DOI: 10.1016/j.ica.2023.121515

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DOI Link: https://doi.org/10.5155/eurjchem.4.3.250-254.791

















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