Molecular structure, vibrational spectra and photochemistry of 5-mercapto-1-methyltetrazole
Autor(a) principal: | |
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Data de Publicação: | 2006 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10316/5089 https://doi.org/10.1016/j.molstruc.2005.08.019 |
Resumo: | In this work, 5-mercapto-1-methyltetrazole was studied by low temperature matrix-isolation and solid-state infrared spectroscopy, DFT(B3LYP)/6-311++G(d,p) calculations and photochemical methods. In the low temperature neat solid phase and isolated in an argon matrix, the compound was found to exist in the 1-methyl-1,4-dihydro-5H-tetrazole-5-thione tautomeric form. The infrared spectra of the compound were fully assigned and correlated with structural properties. In situ UV-irradiation ([lambda]>235 nm) of the matrix-isolated monomer is shown to induce different photochemical processes, all of them involving cleavage of the tetrazole ring: e.g. (1) molecular nitrogen expulsion, with production of 1-methyl-1H-diazirene-3-thiol, which is produced in two different conformers; (2) ring cleavage leading to production of methyl isothiocyanate and azide; (3) simultaneous elimination of nitrogen and sulphur with production of N-methylcarbodiimide. Following these photoprocesses, subsequent reactions occur, leading to production of methyl diazene, carbon monosulphide and nitrogen hydride. Spectroscopic evidence of the production of the above-mentioned chemical species is provided. |
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Molecular structure, vibrational spectra and photochemistry of 5-mercapto-1-methyltetrazole5-Mercapto-1-methyltetrazoleMatrix-isolation infrared spectroscopyPhotochemistryN-methylcarbodiimide1-Methyl-1H-diazirene-3-thiolMethyl isothiocyanateMethyl diazeneCarbon monosulphideNitrogen hydrideIn this work, 5-mercapto-1-methyltetrazole was studied by low temperature matrix-isolation and solid-state infrared spectroscopy, DFT(B3LYP)/6-311++G(d,p) calculations and photochemical methods. In the low temperature neat solid phase and isolated in an argon matrix, the compound was found to exist in the 1-methyl-1,4-dihydro-5H-tetrazole-5-thione tautomeric form. The infrared spectra of the compound were fully assigned and correlated with structural properties. In situ UV-irradiation ([lambda]>235 nm) of the matrix-isolated monomer is shown to induce different photochemical processes, all of them involving cleavage of the tetrazole ring: e.g. (1) molecular nitrogen expulsion, with production of 1-methyl-1H-diazirene-3-thiol, which is produced in two different conformers; (2) ring cleavage leading to production of methyl isothiocyanate and azide; (3) simultaneous elimination of nitrogen and sulphur with production of N-methylcarbodiimide. Following these photoprocesses, subsequent reactions occur, leading to production of methyl diazene, carbon monosulphide and nitrogen hydride. Spectroscopic evidence of the production of the above-mentioned chemical species is provided.http://www.sciencedirect.com/science/article/B6TGS-4H6PM0J-3/1/d869cfbce0f13338578218f0364e037f2006info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleaplication/PDFhttp://hdl.handle.net/10316/5089http://hdl.handle.net/10316/5089https://doi.org/10.1016/j.molstruc.2005.08.019engJournal of Molecular Structure. 786:2-3 (2006) 182-192Gómez-Zavaglia, AndreaReva, I. D.Frija, L.Cristiano, M. L.Fausto, R.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2021-09-03T10:14:00Zoai:estudogeral.uc.pt:10316/5089Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:01:31.799519Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Molecular structure, vibrational spectra and photochemistry of 5-mercapto-1-methyltetrazole |
title |
Molecular structure, vibrational spectra and photochemistry of 5-mercapto-1-methyltetrazole |
spellingShingle |
Molecular structure, vibrational spectra and photochemistry of 5-mercapto-1-methyltetrazole Gómez-Zavaglia, Andrea 5-Mercapto-1-methyltetrazole Matrix-isolation infrared spectroscopy Photochemistry N-methylcarbodiimide 1-Methyl-1H-diazirene-3-thiol Methyl isothiocyanate Methyl diazene Carbon monosulphide Nitrogen hydride |
title_short |
Molecular structure, vibrational spectra and photochemistry of 5-mercapto-1-methyltetrazole |
title_full |
Molecular structure, vibrational spectra and photochemistry of 5-mercapto-1-methyltetrazole |
title_fullStr |
Molecular structure, vibrational spectra and photochemistry of 5-mercapto-1-methyltetrazole |
title_full_unstemmed |
Molecular structure, vibrational spectra and photochemistry of 5-mercapto-1-methyltetrazole |
title_sort |
Molecular structure, vibrational spectra and photochemistry of 5-mercapto-1-methyltetrazole |
author |
Gómez-Zavaglia, Andrea |
author_facet |
Gómez-Zavaglia, Andrea Reva, I. D. Frija, L. Cristiano, M. L. Fausto, R. |
author_role |
author |
author2 |
Reva, I. D. Frija, L. Cristiano, M. L. Fausto, R. |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Gómez-Zavaglia, Andrea Reva, I. D. Frija, L. Cristiano, M. L. Fausto, R. |
dc.subject.por.fl_str_mv |
5-Mercapto-1-methyltetrazole Matrix-isolation infrared spectroscopy Photochemistry N-methylcarbodiimide 1-Methyl-1H-diazirene-3-thiol Methyl isothiocyanate Methyl diazene Carbon monosulphide Nitrogen hydride |
topic |
5-Mercapto-1-methyltetrazole Matrix-isolation infrared spectroscopy Photochemistry N-methylcarbodiimide 1-Methyl-1H-diazirene-3-thiol Methyl isothiocyanate Methyl diazene Carbon monosulphide Nitrogen hydride |
description |
In this work, 5-mercapto-1-methyltetrazole was studied by low temperature matrix-isolation and solid-state infrared spectroscopy, DFT(B3LYP)/6-311++G(d,p) calculations and photochemical methods. In the low temperature neat solid phase and isolated in an argon matrix, the compound was found to exist in the 1-methyl-1,4-dihydro-5H-tetrazole-5-thione tautomeric form. The infrared spectra of the compound were fully assigned and correlated with structural properties. In situ UV-irradiation ([lambda]>235 nm) of the matrix-isolated monomer is shown to induce different photochemical processes, all of them involving cleavage of the tetrazole ring: e.g. (1) molecular nitrogen expulsion, with production of 1-methyl-1H-diazirene-3-thiol, which is produced in two different conformers; (2) ring cleavage leading to production of methyl isothiocyanate and azide; (3) simultaneous elimination of nitrogen and sulphur with production of N-methylcarbodiimide. Following these photoprocesses, subsequent reactions occur, leading to production of methyl diazene, carbon monosulphide and nitrogen hydride. Spectroscopic evidence of the production of the above-mentioned chemical species is provided. |
publishDate |
2006 |
dc.date.none.fl_str_mv |
2006 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10316/5089 http://hdl.handle.net/10316/5089 https://doi.org/10.1016/j.molstruc.2005.08.019 |
url |
http://hdl.handle.net/10316/5089 https://doi.org/10.1016/j.molstruc.2005.08.019 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Molecular Structure. 786:2-3 (2006) 182-192 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
aplication/PDF |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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