Crystal structure and properties of l-tryptophanium hydrogen selenite
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/10316/4402 https://doi.org/10.1002/ejic.200600298 |
Resumo: | l-Tryptophanium hydrogen selenite was synthesised and structurally characterised at room and low temperature. The aminoacid is positively charged with the amine and carboxylic group protonated. It adopts a staggered conformation with the N1 gauche to C4 that is gauche to C1. The anion displays a pyramidal conformation with three different Se-O bond lengths, one characteristic of a double bond, another of a single bond and the third with an intermediate character. At room temperature there is a disordered hydrogen atom between the carboxylic group of the cation and the O atom of the anion with the intermediate Se-O bond length. At low temperature this hydrogen atom orders and attaches to the carboxylic group. This ordering is most likely related to the transition seen in DSC measurements occurring at -82.5 °C. |
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Crystal structure and properties of l-tryptophanium hydrogen selenitePhase transitionHydrogen bondsDSC measurementsOptical propertiesl-Tryptophanium hydrogen selenite was synthesised and structurally characterised at room and low temperature. The aminoacid is positively charged with the amine and carboxylic group protonated. It adopts a staggered conformation with the N1 gauche to C4 that is gauche to C1. The anion displays a pyramidal conformation with three different Se-O bond lengths, one characteristic of a double bond, another of a single bond and the third with an intermediate character. At room temperature there is a disordered hydrogen atom between the carboxylic group of the cation and the O atom of the anion with the intermediate Se-O bond length. At low temperature this hydrogen atom orders and attaches to the carboxylic group. This ordering is most likely related to the transition seen in DSC measurements occurring at -82.5 °C.http://www.sciencedirect.com/science/article/B6TH8-4JCBPGR-2/1/c662b0efb725c1398debc306ae4eb8f92006info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleaplication/PDFhttp://hdl.handle.net/10316/4402http://hdl.handle.net/10316/4402https://doi.org/10.1002/ejic.200600298engPolyhedron. 25:9 (2006) 2021-2025Paixão, José AntónioSilva, Manuela RamosBeja, Ana MatosEusébio, Ermelindainfo: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:RCAAP2020-11-06T16:48:36Zoai:estudogeral.uc.pt:10316/4402Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:59:36.430149Repositório 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 |
Crystal structure and properties of l-tryptophanium hydrogen selenite |
title |
Crystal structure and properties of l-tryptophanium hydrogen selenite |
spellingShingle |
Crystal structure and properties of l-tryptophanium hydrogen selenite Paixão, José António Phase transition Hydrogen bonds DSC measurements Optical properties |
title_short |
Crystal structure and properties of l-tryptophanium hydrogen selenite |
title_full |
Crystal structure and properties of l-tryptophanium hydrogen selenite |
title_fullStr |
Crystal structure and properties of l-tryptophanium hydrogen selenite |
title_full_unstemmed |
Crystal structure and properties of l-tryptophanium hydrogen selenite |
title_sort |
Crystal structure and properties of l-tryptophanium hydrogen selenite |
author |
Paixão, José António |
author_facet |
Paixão, José António Silva, Manuela Ramos Beja, Ana Matos Eusébio, Ermelinda |
author_role |
author |
author2 |
Silva, Manuela Ramos Beja, Ana Matos Eusébio, Ermelinda |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Paixão, José António Silva, Manuela Ramos Beja, Ana Matos Eusébio, Ermelinda |
dc.subject.por.fl_str_mv |
Phase transition Hydrogen bonds DSC measurements Optical properties |
topic |
Phase transition Hydrogen bonds DSC measurements Optical properties |
description |
l-Tryptophanium hydrogen selenite was synthesised and structurally characterised at room and low temperature. The aminoacid is positively charged with the amine and carboxylic group protonated. It adopts a staggered conformation with the N1 gauche to C4 that is gauche to C1. The anion displays a pyramidal conformation with three different Se-O bond lengths, one characteristic of a double bond, another of a single bond and the third with an intermediate character. At room temperature there is a disordered hydrogen atom between the carboxylic group of the cation and the O atom of the anion with the intermediate Se-O bond length. At low temperature this hydrogen atom orders and attaches to the carboxylic group. This ordering is most likely related to the transition seen in DSC measurements occurring at -82.5 °C. |
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/10316/4402 http://hdl.handle.net/10316/4402 https://doi.org/10.1002/ejic.200600298 |
url |
http://hdl.handle.net/10316/4402 https://doi.org/10.1002/ejic.200600298 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Polyhedron. 25:9 (2006) 2021-2025 |
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 |
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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) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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