Thermodynamics of binary and ternary complexes of 3-amino-1,2,4-triazole and amino acids with Ni(II) and Co(II)
The stability constants of the 1:1 binary complexes of Ni(II) and Co(II) with 3-amino-1,2,4-triazole (AT), leucine (Leu) and glutamic acid (Glu), and the 1:1:1 ternary complex of them and the protonation constants of the ligands were determined potentiometrically at a constant ionic strength of I =...
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Serbian Chemical Society
2005-09-01
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| Series: | Journal of the Serbian Chemical Society |
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| Online Access: | http://www.shd.org.yu/HtDocs/SHD/vol70/No8-9/JSCS_V70_No8-9-05.pdf |
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doaj-42e7efad09f946dd9415d344551377cd2020-11-24T23:03:41ZengSerbian Chemical Society Journal of the Serbian Chemical Society0352-51392005-09-01708-910571066Thermodynamics of binary and ternary complexes of 3-amino-1,2,4-triazole and amino acids with Ni(II) and Co(II)AYSE ERÇAĞTUBA SISMANOĞLUSÜHEYLA PURAThe stability constants of the 1:1 binary complexes of Ni(II) and Co(II) with 3-amino-1,2,4-triazole (AT), leucine (Leu) and glutamic acid (Glu), and the 1:1:1 ternary complex of them and the protonation constants of the ligands were determined potentiometrically at a constant ionic strength of I = 0.10molL-1 (NaClO4) in aqueous solutions at 15.0 and 25.0 ºC. The thermodynamic parameters DGf0, DHf0 and DSf0 are reported for the formation reactions of the complexes. The enthalpy changes of all the complexations were found to be negative but the entropy changes positive. While the driving force for the formation of the Ni(II), Co(II) – AT complexes is the enthalpy decrease, the driving force for the ternary complexes of AT is the entropy increase.http://www.shd.org.yu/HtDocs/SHD/vol70/No8-9/JSCS_V70_No8-9-05.pdfleucineglutamic acidamitrolebinary and ternary complexes |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
AYSE ERÇAĞ TUBA SISMANOĞLU SÜHEYLA PURA |
| spellingShingle |
AYSE ERÇAĞ TUBA SISMANOĞLU SÜHEYLA PURA Thermodynamics of binary and ternary complexes of 3-amino-1,2,4-triazole and amino acids with Ni(II) and Co(II) Journal of the Serbian Chemical Society leucine glutamic acid amitrole binary and ternary complexes |
| author_facet |
AYSE ERÇAĞ TUBA SISMANOĞLU SÜHEYLA PURA |
| author_sort |
AYSE ERÇAĞ |
| title |
Thermodynamics of binary and ternary complexes of 3-amino-1,2,4-triazole and amino acids with Ni(II) and Co(II) |
| title_short |
Thermodynamics of binary and ternary complexes of 3-amino-1,2,4-triazole and amino acids with Ni(II) and Co(II) |
| title_full |
Thermodynamics of binary and ternary complexes of 3-amino-1,2,4-triazole and amino acids with Ni(II) and Co(II) |
| title_fullStr |
Thermodynamics of binary and ternary complexes of 3-amino-1,2,4-triazole and amino acids with Ni(II) and Co(II) |
| title_full_unstemmed |
Thermodynamics of binary and ternary complexes of 3-amino-1,2,4-triazole and amino acids with Ni(II) and Co(II) |
| title_sort |
thermodynamics of binary and ternary complexes of 3-amino-1,2,4-triazole and amino acids with ni(ii) and co(ii) |
| publisher |
Serbian Chemical Society |
| series |
Journal of the Serbian Chemical Society |
| issn |
0352-5139 |
| publishDate |
2005-09-01 |
| description |
The stability constants of the 1:1 binary complexes of Ni(II) and Co(II) with 3-amino-1,2,4-triazole (AT), leucine (Leu) and glutamic acid (Glu), and the 1:1:1 ternary complex of them and the protonation constants of the ligands were determined potentiometrically at a constant ionic strength of I = 0.10molL-1 (NaClO4) in aqueous solutions at 15.0 and 25.0 ºC. The thermodynamic parameters DGf0, DHf0 and DSf0 are reported for the formation reactions of the complexes. The enthalpy changes of all the complexations were found to be negative but the entropy changes positive. While the driving force for the formation of the Ni(II), Co(II) – AT complexes is the enthalpy decrease, the driving force for the ternary complexes of AT is the entropy increase. |
| topic |
leucine glutamic acid amitrole binary and ternary complexes |
| url |
http://www.shd.org.yu/HtDocs/SHD/vol70/No8-9/JSCS_V70_No8-9-05.pdf |
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