Tautomer selective photochemistry in 1-(tetrazol-5-yl)ethanol

Autores
Ismael, Amín; Cristiano, M.L.S.; Fausto, Rui; Gomez Zavaglia, Andrea
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A combined matrix isolation FTIR and theoretical DFT/B3LYP/6-311++G(d,p) study of the molecular structure and photochemistry of 1-(tetrazol-5-yl)ethanol [1-TE] was performed. The potential energy surface landscapes of the 1H and 2H tautomers of the compound were investigated and the theoretical results were used to help characterize the conformational mixture existing in equilibrium in the gas phase prior to deposition of the matrices, as well as the conformers trapped in the latter. In the gas phase, at room temperature, the compound exists as a mixture of 12 conformers (five of the 1H tautomer and seven of the 2H tautomer). Upon deposition of the compound in an argon matrix at 10 K, only three main forms survive, because the low barriers for conformational isomerization allow extensive conformational cooling during deposition. Deposition of the matrix at 30 K led to further simplification of the conformational mixture with only one conformer of each tautomer of 1-TE surviving. These conformers correspond to the most stable forms of each tautomer, which bear different types of intramolecular H-bonds: 1H-I has an NH· · ·O hydrogen bond, whereas 2H-I has an OH· · ·N hydrogen bond. Upon irradiating with UV light (λ > 200 nm), a matrix containing both 1H-I and 2H-I forms, an unprecedented tautomer selective photochemistry was observed, with the 2H tautomeric form undergoing unimolecular decomposition to azide + hydroxypropanenitrile and the 1H-tautomer being photostable.
Fil: Ismael, Amín. Universidad de Algarve; Portugal
Fil: Cristiano, M.L.S.. Universidad de Algarve; Portugal
Fil: Fausto, Rui. Universidad de Coimbra; Portugal
Fil: Gomez Zavaglia, Andrea. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos; Argentina. Universidad de Coimbra; Portugal
Materia
Tetrazole
Photochemistry
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/131307
Acceder
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network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling Tautomer selective photochemistry in 1-(tetrazol-5-yl)ethanolIsmael, AmínCristiano, M.L.S.Fausto, RuiGomez Zavaglia, AndreaTetrazolePhotochemistryhttps://purl.org/becyt/ford/2.11https://purl.org/becyt/ford/2A combined matrix isolation FTIR and theoretical DFT/B3LYP/6-311++G(d,p) study of the molecular structure and photochemistry of 1-(tetrazol-5-yl)ethanol [1-TE] was performed. The potential energy surface landscapes of the 1H and 2H tautomers of the compound were investigated and the theoretical results were used to help characterize the conformational mixture existing in equilibrium in the gas phase prior to deposition of the matrices, as well as the conformers trapped in the latter. In the gas phase, at room temperature, the compound exists as a mixture of 12 conformers (five of the 1H tautomer and seven of the 2H tautomer). Upon deposition of the compound in an argon matrix at 10 K, only three main forms survive, because the low barriers for conformational isomerization allow extensive conformational cooling during deposition. Deposition of the matrix at 30 K led to further simplification of the conformational mixture with only one conformer of each tautomer of 1-TE surviving. These conformers correspond to the most stable forms of each tautomer, which bear different types of intramolecular H-bonds: 1H-I has an NH· · ·O hydrogen bond, whereas 2H-I has an OH· · ·N hydrogen bond. Upon irradiating with UV light (λ > 200 nm), a matrix containing both 1H-I and 2H-I forms, an unprecedented tautomer selective photochemistry was observed, with the 2H tautomeric form undergoing unimolecular decomposition to azide + hydroxypropanenitrile and the 1H-tautomer being photostable.Fil: Ismael, Amín. Universidad de Algarve; PortugalFil: Cristiano, M.L.S.. Universidad de Algarve; PortugalFil: Fausto, Rui. Universidad de Coimbra; PortugalFil: Gomez Zavaglia, Andrea. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos; Argentina. Universidad de Coimbra; PortugalAmerican Chemical Society2010-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/131307Ismael, Amín; Cristiano, M.L.S.; Fausto, Rui; Gomez Zavaglia, Andrea; Tautomer selective photochemistry in 1-(tetrazol-5-yl)ethanol; American Chemical Society; Journal of Physical Chemistry A; 114; 50; 11-2010; 13076-130851089-56391520-5215CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1021/jp109215qinfo:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/10.1021/jp109215qinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:45:09Zoai:ri.conicet.gov.ar:11336/131307instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:45:09.396CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Tautomer selective photochemistry in 1-(tetrazol-5-yl)ethanol
title Tautomer selective photochemistry in 1-(tetrazol-5-yl)ethanol
spellingShingle Tautomer selective photochemistry in 1-(tetrazol-5-yl)ethanol
Ismael, Amín
Tetrazole
Photochemistry
title_short Tautomer selective photochemistry in 1-(tetrazol-5-yl)ethanol
title_full Tautomer selective photochemistry in 1-(tetrazol-5-yl)ethanol
title_fullStr Tautomer selective photochemistry in 1-(tetrazol-5-yl)ethanol
title_full_unstemmed Tautomer selective photochemistry in 1-(tetrazol-5-yl)ethanol
title_sort Tautomer selective photochemistry in 1-(tetrazol-5-yl)ethanol
dc.creator.none.fl_str_mv Ismael, Amín
Cristiano, M.L.S.
Fausto, Rui
Gomez Zavaglia, Andrea
author Ismael, Amín
author_facet Ismael, Amín
Cristiano, M.L.S.
Fausto, Rui
Gomez Zavaglia, Andrea
author_role author
author2 Cristiano, M.L.S.
Fausto, Rui
Gomez Zavaglia, Andrea
author2_role author
author
author
dc.subject.none.fl_str_mv Tetrazole
Photochemistry
topic Tetrazole
Photochemistry
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.11
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv A combined matrix isolation FTIR and theoretical DFT/B3LYP/6-311++G(d,p) study of the molecular structure and photochemistry of 1-(tetrazol-5-yl)ethanol [1-TE] was performed. The potential energy surface landscapes of the 1H and 2H tautomers of the compound were investigated and the theoretical results were used to help characterize the conformational mixture existing in equilibrium in the gas phase prior to deposition of the matrices, as well as the conformers trapped in the latter. In the gas phase, at room temperature, the compound exists as a mixture of 12 conformers (five of the 1H tautomer and seven of the 2H tautomer). Upon deposition of the compound in an argon matrix at 10 K, only three main forms survive, because the low barriers for conformational isomerization allow extensive conformational cooling during deposition. Deposition of the matrix at 30 K led to further simplification of the conformational mixture with only one conformer of each tautomer of 1-TE surviving. These conformers correspond to the most stable forms of each tautomer, which bear different types of intramolecular H-bonds: 1H-I has an NH· · ·O hydrogen bond, whereas 2H-I has an OH· · ·N hydrogen bond. Upon irradiating with UV light (λ > 200 nm), a matrix containing both 1H-I and 2H-I forms, an unprecedented tautomer selective photochemistry was observed, with the 2H tautomeric form undergoing unimolecular decomposition to azide + hydroxypropanenitrile and the 1H-tautomer being photostable.
Fil: Ismael, Amín. Universidad de Algarve; Portugal
Fil: Cristiano, M.L.S.. Universidad de Algarve; Portugal
Fil: Fausto, Rui. Universidad de Coimbra; Portugal
Fil: Gomez Zavaglia, Andrea. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos; Argentina. Universidad de Coimbra; Portugal
description A combined matrix isolation FTIR and theoretical DFT/B3LYP/6-311++G(d,p) study of the molecular structure and photochemistry of 1-(tetrazol-5-yl)ethanol [1-TE] was performed. The potential energy surface landscapes of the 1H and 2H tautomers of the compound were investigated and the theoretical results were used to help characterize the conformational mixture existing in equilibrium in the gas phase prior to deposition of the matrices, as well as the conformers trapped in the latter. In the gas phase, at room temperature, the compound exists as a mixture of 12 conformers (five of the 1H tautomer and seven of the 2H tautomer). Upon deposition of the compound in an argon matrix at 10 K, only three main forms survive, because the low barriers for conformational isomerization allow extensive conformational cooling during deposition. Deposition of the matrix at 30 K led to further simplification of the conformational mixture with only one conformer of each tautomer of 1-TE surviving. These conformers correspond to the most stable forms of each tautomer, which bear different types of intramolecular H-bonds: 1H-I has an NH· · ·O hydrogen bond, whereas 2H-I has an OH· · ·N hydrogen bond. Upon irradiating with UV light (λ > 200 nm), a matrix containing both 1H-I and 2H-I forms, an unprecedented tautomer selective photochemistry was observed, with the 2H tautomeric form undergoing unimolecular decomposition to azide + hydroxypropanenitrile and the 1H-tautomer being photostable.
publishDate 2010
dc.date.none.fl_str_mv 2010-11
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/131307
Ismael, Amín; Cristiano, M.L.S.; Fausto, Rui; Gomez Zavaglia, Andrea; Tautomer selective photochemistry in 1-(tetrazol-5-yl)ethanol; American Chemical Society; Journal of Physical Chemistry A; 114; 50; 11-2010; 13076-13085
1089-5639
1520-5215
CONICET Digital
CONICET
url http://hdl.handle.net/11336/131307
identifier_str_mv Ismael, Amín; Cristiano, M.L.S.; Fausto, Rui; Gomez Zavaglia, Andrea; Tautomer selective photochemistry in 1-(tetrazol-5-yl)ethanol; American Chemical Society; Journal of Physical Chemistry A; 114; 50; 11-2010; 13076-13085
1089-5639
1520-5215
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1021/jp109215q
info:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/10.1021/jp109215q
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Chemical Society
publisher.none.fl_str_mv American Chemical Society
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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