A study of the behaviour of some substituted 1,2,4-triazoline-3-thiones in different media
The acid-base behaviour of 4-phenyl-5-(4-R-benzyl)-1,2,4-triazoline-3-thione (1(R = OH); 2(R = OC2H5)) was studied in aqueous sulfuric acid and sodium hydroxide solutions. Three ionisation equilibria of compound 1 (pKBH3+ = 4.64, pKBH2 = 7.50, pKBH = 10.06) and two ionisation equilibria of compound...
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| Format: | Article |
| Language: | English |
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Serbian Chemical Society
2000-09-01
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| Series: | Journal of the Serbian Chemical Society |
| Subjects: | |
| Online Access: | http://www.shd.org.yu/HtDocs/SHD/Vol65/No9-Pdf/JSCS9-02.pdf |
| _version_ | 1818083301124997120 |
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| author | MARIJA LAZAREVIC LUCIJANA ARMAN-ZUBIC NADA PERISIC-JANJIC |
| author_facet | MARIJA LAZAREVIC LUCIJANA ARMAN-ZUBIC NADA PERISIC-JANJIC |
| author_sort | MARIJA LAZAREVIC |
| collection | DOAJ |
| description | The acid-base behaviour of 4-phenyl-5-(4-R-benzyl)-1,2,4-triazoline-3-thione (1(R = OH); 2(R = OC2H5)) was studied in aqueous sulfuric acid and sodium hydroxide solutions. Three ionisation equilibria of compound 1 (pKBH3+ = 4.64, pKBH2 = 7.50, pKBH = 10.06) and two ionisation equilibria of compound 2 (pKBH2+ = 4.82, pKBH = 7.45) were found. The first equilibrium belongs to the protonation of 1,2,4-triazoline-3-thione, while the second belongs to the dissociation of the same part of the molecule. The third equilibrium represents the dissociation process of the phenolic OH group of compound 1. The kinetics of hydrolysis of compounds 1 and 2 were studied in high concentrated sulfuric acid solutions. The hydrolysis follows an irreversible first-order consecutive reaction path. |
| first_indexed | 2024-12-10T19:35:49Z |
| format | Article |
| id | doaj.art-f8de8c2b04124a0888e6879b09a8c0e6 |
| institution | Directory Open Access Journal |
| issn | 0352-5139 |
| language | English |
| last_indexed | 2024-12-10T19:35:49Z |
| publishDate | 2000-09-01 |
| publisher | Serbian Chemical Society |
| record_format | Article |
| series | Journal of the Serbian Chemical Society |
| spelling | doaj.art-f8de8c2b04124a0888e6879b09a8c0e62022-12-22T01:36:08ZengSerbian Chemical SocietyJournal of the Serbian Chemical Society0352-51392000-09-01659619630A study of the behaviour of some substituted 1,2,4-triazoline-3-thiones in different mediaMARIJA LAZAREVICLUCIJANA ARMAN-ZUBICNADA PERISIC-JANJICThe acid-base behaviour of 4-phenyl-5-(4-R-benzyl)-1,2,4-triazoline-3-thione (1(R = OH); 2(R = OC2H5)) was studied in aqueous sulfuric acid and sodium hydroxide solutions. Three ionisation equilibria of compound 1 (pKBH3+ = 4.64, pKBH2 = 7.50, pKBH = 10.06) and two ionisation equilibria of compound 2 (pKBH2+ = 4.82, pKBH = 7.45) were found. The first equilibrium belongs to the protonation of 1,2,4-triazoline-3-thione, while the second belongs to the dissociation of the same part of the molecule. The third equilibrium represents the dissociation process of the phenolic OH group of compound 1. The kinetics of hydrolysis of compounds 1 and 2 were studied in high concentrated sulfuric acid solutions. The hydrolysis follows an irreversible first-order consecutive reaction path.http://www.shd.org.yu/HtDocs/SHD/Vol65/No9-Pdf/JSCS9-02.pdf124-triazoline-3-thione derivativeselectonic absorption spectradissociation constantsacid hydrolysis |
| spellingShingle | MARIJA LAZAREVIC LUCIJANA ARMAN-ZUBIC NADA PERISIC-JANJIC A study of the behaviour of some substituted 1,2,4-triazoline-3-thiones in different media Journal of the Serbian Chemical Society 1 2 4-triazoline-3-thione derivatives electonic absorption spectra dissociation constants acid hydrolysis |
| title | A study of the behaviour of some substituted 1,2,4-triazoline-3-thiones in different media |
| title_full | A study of the behaviour of some substituted 1,2,4-triazoline-3-thiones in different media |
| title_fullStr | A study of the behaviour of some substituted 1,2,4-triazoline-3-thiones in different media |
| title_full_unstemmed | A study of the behaviour of some substituted 1,2,4-triazoline-3-thiones in different media |
| title_short | A study of the behaviour of some substituted 1,2,4-triazoline-3-thiones in different media |
| title_sort | study of the behaviour of some substituted 1 2 4 triazoline 3 thiones in different media |
| topic | 1 2 4-triazoline-3-thione derivatives electonic absorption spectra dissociation constants acid hydrolysis |
| url | http://www.shd.org.yu/HtDocs/SHD/Vol65/No9-Pdf/JSCS9-02.pdf |
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