Isolamento e caracterização de acil-tiossemicarbazidas como intermediários na síntese de compostos mesoiônicos Isolation and characterization of acyl-thiosemicarbazides as intermediates in mesoionic compounds synthesis
<abstract language="eng">1,3,4-thiadiazolium-2-aminides and their isomers 1,3,4-triazolium-2-thiolates have been synthesized via anhydroacylation reactions. This work presents a study by infrared monitoring of the reaction between substituted aroyl acid chlorides and 1,4-diphenylthio...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Química
1998-10-01
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| Series: | Química Nova |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40421998000500007 |
| _version_ | 1818132554409050112 |
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| author | M. A. M. Maciel A. Echevarria V. M. Rumjanek |
| author_facet | M. A. M. Maciel A. Echevarria V. M. Rumjanek |
| author_sort | M. A. M. Maciel |
| collection | DOAJ |
| description | <abstract language="eng">1,3,4-thiadiazolium-2-aminides and their isomers 1,3,4-triazolium-2-thiolates have been synthesized via anhydroacylation reactions. This work presents a study by infrared monitoring of the reaction between substituted aroyl acid chlorides and 1,4-diphenylthiosemcarbazide. The intermediates and products were isolated, purified and charaterized by IR and 13C NMR spectroscopy. The increasing or decreasing in intensity of characteristic stretching bands indicated the rate dependence on the electronic nature of substituents. The results also demonstrate that 1,3,4-triazolium-2-thiolates are obtained in anhydrous conditions whereas presence of water leads to a mixture of the isomers. |
| first_indexed | 2024-12-11T08:38:40Z |
| format | Article |
| id | doaj.art-0dd43ca6dfd3460287fd1e2b8332fa53 |
| institution | Directory Open Access Journal |
| issn | 0100-4042 1678-7064 |
| language | English |
| last_indexed | 2024-12-11T08:38:40Z |
| publishDate | 1998-10-01 |
| publisher | Sociedade Brasileira de Química |
| record_format | Article |
| series | Química Nova |
| spelling | doaj.art-0dd43ca6dfd3460287fd1e2b8332fa532022-12-22T01:14:18ZengSociedade Brasileira de QuímicaQuímica Nova0100-40421678-70641998-10-0121556957210.1590/S0100-40421998000500007Isolamento e caracterização de acil-tiossemicarbazidas como intermediários na síntese de compostos mesoiônicos Isolation and characterization of acyl-thiosemicarbazides as intermediates in mesoionic compounds synthesisM. A. M. MacielA. EchevarriaV. M. Rumjanek<abstract language="eng">1,3,4-thiadiazolium-2-aminides and their isomers 1,3,4-triazolium-2-thiolates have been synthesized via anhydroacylation reactions. This work presents a study by infrared monitoring of the reaction between substituted aroyl acid chlorides and 1,4-diphenylthiosemcarbazide. The intermediates and products were isolated, purified and charaterized by IR and 13C NMR spectroscopy. The increasing or decreasing in intensity of characteristic stretching bands indicated the rate dependence on the electronic nature of substituents. The results also demonstrate that 1,3,4-triazolium-2-thiolates are obtained in anhydrous conditions whereas presence of water leads to a mixture of the isomers.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40421998000500007mesoionic compoundsinfra-red studyacyl-thiosemicarbazides |
| spellingShingle | M. A. M. Maciel A. Echevarria V. M. Rumjanek Isolamento e caracterização de acil-tiossemicarbazidas como intermediários na síntese de compostos mesoiônicos Isolation and characterization of acyl-thiosemicarbazides as intermediates in mesoionic compounds synthesis Química Nova mesoionic compounds infra-red study acyl-thiosemicarbazides |
| title | Isolamento e caracterização de acil-tiossemicarbazidas como intermediários na síntese de compostos mesoiônicos Isolation and characterization of acyl-thiosemicarbazides as intermediates in mesoionic compounds synthesis |
| title_full | Isolamento e caracterização de acil-tiossemicarbazidas como intermediários na síntese de compostos mesoiônicos Isolation and characterization of acyl-thiosemicarbazides as intermediates in mesoionic compounds synthesis |
| title_fullStr | Isolamento e caracterização de acil-tiossemicarbazidas como intermediários na síntese de compostos mesoiônicos Isolation and characterization of acyl-thiosemicarbazides as intermediates in mesoionic compounds synthesis |
| title_full_unstemmed | Isolamento e caracterização de acil-tiossemicarbazidas como intermediários na síntese de compostos mesoiônicos Isolation and characterization of acyl-thiosemicarbazides as intermediates in mesoionic compounds synthesis |
| title_short | Isolamento e caracterização de acil-tiossemicarbazidas como intermediários na síntese de compostos mesoiônicos Isolation and characterization of acyl-thiosemicarbazides as intermediates in mesoionic compounds synthesis |
| title_sort | isolamento e caracterizacao de acil tiossemicarbazidas como intermediarios na sintese de compostos mesoionicos isolation and characterization of acyl thiosemicarbazides as intermediates in mesoionic compounds synthesis |
| topic | mesoionic compounds infra-red study acyl-thiosemicarbazides |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40421998000500007 |
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