Dissociation of 5-nitroso-2,4,6-triamino-pyrimidine and stability of its complexes with Co(II), Ni(II) and Cu(II)

The influence of ionic strength and temperature on the deprotonation process of 5-nitroso-2,4,6-triamino-pyrimidine as well as the stability of its complexes with Co(II), Ni(II) and Cu(II), in aqueous solution, has been studied by Bjerrum's method. From data obtained, thermodynamic equilibrium...

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Bibliographic Details
Published in:Thermochimica acta 1986-06, Vol.102, p.163-172
Main Authors: Hernández-Alvaro, J., Martinez-Becerra, M.A., Moreno-Carretero, M.N., Salas-Peregrin, J.M.
Format: Article
Language:English
Subjects:
Applied sciences
Chemistry
Coordination compounds
Exact sciences and technology
Inorganic chemistry and origins of life
Other techniques and industries
Preparations and properties
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Summary:The influence of ionic strength and temperature on the deprotonation process of 5-nitroso-2,4,6-triamino-pyrimidine as well as the stability of its complexes with Co(II), Ni(II) and Cu(II), in aqueous solution, has been studied by Bjerrum's method. From data obtained, thermodynamic equilibrium constants for both dissociation and complexation processes have been calculated using the Debye-Hückel limit law and adjusting log K vs. √ I values at a parabolic equation by the least-squares method. Likewise, enthalpy and entropy changes for these reactions are reported.
ISSN:0040-6031
1872-762X
DOI:10.1016/0040-6031(86)85324-2