European Journal of Chemistry 2013, 4(3), 250-254 | doi: https://doi.org/10.5155/eurjchem.4.3.250-254.791 | Get rights and content

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Synthesis, characterization and thermochemistry of piperazine complexes of bivalent metal bromides


Pedro Oliver Dunstan (1,*) , Abdul Majeed Khan (2)

(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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Keywords


Adducts; Metal bromides; Transition metals; Coordinated bonds; Enthalpies of solution; Thermochemical parameters

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DOI: 10.5155/eurjchem.4.3.250-254.791

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Funding information


TWAS (The Academy of Sciences for the Developing World) and CNPq (Conselho Nacional de Pesquisa)

Citations

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[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
/


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How to cite


Dunstan, P.; Khan, A. Eur. J. Chem. 2013, 4(3), 250-254. doi:10.5155/eurjchem.4.3.250-254.791
Dunstan, P.; Khan, A. Synthesis, characterization and thermochemistry of piperazine complexes of bivalent metal bromides. Eur. J. Chem. 2013, 4(3), 250-254. doi:10.5155/eurjchem.4.3.250-254.791
Dunstan, P., & Khan, A. (2013). Synthesis, characterization and thermochemistry of piperazine complexes of bivalent metal bromides. European Journal of Chemistry, 4(3), 250-254. doi:10.5155/eurjchem.4.3.250-254.791
Dunstan, Pedro, & Abdul Majeed Khan. "Synthesis, characterization and thermochemistry of piperazine complexes of bivalent metal bromides." European Journal of Chemistry [Online], 4.3 (2013): 250-254. Web. 28 Nov. 2021
Dunstan, Pedro, AND Khan, Abdul. "Synthesis, characterization and thermochemistry of piperazine complexes of bivalent metal bromides" European Journal of Chemistry [Online], Volume 4 Number 3 (30 September 2013)

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