19F chemical shifts, coupling constants and conformational preferences in monosubstituted perfluoroparacyclophanes
- Autores
- Ghiviriga, Ion; Zhang, Lianhao; Martinez, Henry; Contreras, Ruben Horacio; Tormena, Cláudio F.; Nodin, Laura; Dolbier Jr., William R.
- Año de publicación
- 2011
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- In the process of studying the chemistry of perfluoro[2.2]paracyclophanes (PFPCs), a novel class of compounds, it became necessary to identify some disubstituted products. To achieve this goal, we characterize in this work some monosubstituted PFPCs, identifying their 19F-19F coupling patterns, and establishing a methodology for the assignment of their 19F chemical shifts. The pattern of coupling constants indicates a skewed geometry in which the upper deck moves towards or away from the substituent, depending on the substituent electron-donor character and size. Quantum chemical calculations, performed at the HF/6-311 + G(d,p)//B3LYP/EPR-III level of theory, confirmed the conformations inferred from coupling constants and reproduced well the values of the couplings. Transmission mechanisms for the FC term of four-and five-bond 19F-19F couplings are discussed in detail. Understanding the conformational preferences of PFPCs and how they are reflected by the coupling constants facilitates the assignment of 19F chemical shifts in monosubstituted PFPCs and the identification of the disubstituted products. Copyright © 2011 John Wiley & Sons, Ltd.
Fil: Ghiviriga, Ion. University of Florida; Estados Unidos
Fil: Zhang, Lianhao. University of Florida; Estados Unidos
Fil: Martinez, Henry. University of Florida; Estados Unidos
Fil: Contreras, Ruben Horacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina
Fil: Tormena, Cláudio F.. Universidade Estadual de Campinas; Brasil
Fil: Nodin, Laura. University of Florida; Estados Unidos
Fil: Dolbier Jr., William R.. University of Florida; Estados Unidos - Materia
-
19f Chemical Shifts
19f-19f Couplings
Conformation
Fccp-Cmo
Fermi Hole
Nmr
Paracyclophane
Perfluoro[2.2]Paracyclophane
Through-Space - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/56984
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19F chemical shifts, coupling constants and conformational preferences in monosubstituted perfluoroparacyclophanesGhiviriga, IonZhang, LianhaoMartinez, HenryContreras, Ruben HoracioTormena, Cláudio F.Nodin, LauraDolbier Jr., William R.19f Chemical Shifts19f-19f CouplingsConformationFccp-CmoFermi HoleNmrParacyclophanePerfluoro[2.2]ParacyclophaneThrough-Spacehttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1In the process of studying the chemistry of perfluoro[2.2]paracyclophanes (PFPCs), a novel class of compounds, it became necessary to identify some disubstituted products. To achieve this goal, we characterize in this work some monosubstituted PFPCs, identifying their 19F-19F coupling patterns, and establishing a methodology for the assignment of their 19F chemical shifts. The pattern of coupling constants indicates a skewed geometry in which the upper deck moves towards or away from the substituent, depending on the substituent electron-donor character and size. Quantum chemical calculations, performed at the HF/6-311 + G(d,p)//B3LYP/EPR-III level of theory, confirmed the conformations inferred from coupling constants and reproduced well the values of the couplings. Transmission mechanisms for the FC term of four-and five-bond 19F-19F couplings are discussed in detail. Understanding the conformational preferences of PFPCs and how they are reflected by the coupling constants facilitates the assignment of 19F chemical shifts in monosubstituted PFPCs and the identification of the disubstituted products. Copyright © 2011 John Wiley & Sons, Ltd.Fil: Ghiviriga, Ion. University of Florida; Estados UnidosFil: Zhang, Lianhao. University of Florida; Estados UnidosFil: Martinez, Henry. University of Florida; Estados UnidosFil: Contreras, Ruben Horacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; ArgentinaFil: Tormena, Cláudio F.. Universidade Estadual de Campinas; BrasilFil: Nodin, Laura. University of Florida; Estados UnidosFil: Dolbier Jr., William R.. University of Florida; Estados UnidosJohn Wiley & Sons Ltd2011-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/56984Ghiviriga, Ion; Zhang, Lianhao; Martinez, Henry; Contreras, Ruben Horacio; Tormena, Cláudio F.; et al.; 19F chemical shifts, coupling constants and conformational preferences in monosubstituted perfluoroparacyclophanes; John Wiley & Sons Ltd; Magnetic Resonance in Chemistry; 49; 3; 2-2011; 93-1050749-1581CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1002/mrc.2713info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:42:42Zoai:ri.conicet.gov.ar:11336/56984instacron: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 09:42:43.27CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
19F chemical shifts, coupling constants and conformational preferences in monosubstituted perfluoroparacyclophanes |
title |
19F chemical shifts, coupling constants and conformational preferences in monosubstituted perfluoroparacyclophanes |
spellingShingle |
19F chemical shifts, coupling constants and conformational preferences in monosubstituted perfluoroparacyclophanes Ghiviriga, Ion 19f Chemical Shifts 19f-19f Couplings Conformation Fccp-Cmo Fermi Hole Nmr Paracyclophane Perfluoro[2.2]Paracyclophane Through-Space |
title_short |
19F chemical shifts, coupling constants and conformational preferences in monosubstituted perfluoroparacyclophanes |
title_full |
19F chemical shifts, coupling constants and conformational preferences in monosubstituted perfluoroparacyclophanes |
title_fullStr |
19F chemical shifts, coupling constants and conformational preferences in monosubstituted perfluoroparacyclophanes |
title_full_unstemmed |
19F chemical shifts, coupling constants and conformational preferences in monosubstituted perfluoroparacyclophanes |
title_sort |
19F chemical shifts, coupling constants and conformational preferences in monosubstituted perfluoroparacyclophanes |
dc.creator.none.fl_str_mv |
Ghiviriga, Ion Zhang, Lianhao Martinez, Henry Contreras, Ruben Horacio Tormena, Cláudio F. Nodin, Laura Dolbier Jr., William R. |
author |
Ghiviriga, Ion |
author_facet |
Ghiviriga, Ion Zhang, Lianhao Martinez, Henry Contreras, Ruben Horacio Tormena, Cláudio F. Nodin, Laura Dolbier Jr., William R. |
author_role |
author |
author2 |
Zhang, Lianhao Martinez, Henry Contreras, Ruben Horacio Tormena, Cláudio F. Nodin, Laura Dolbier Jr., William R. |
author2_role |
author author author author author author |
dc.subject.none.fl_str_mv |
19f Chemical Shifts 19f-19f Couplings Conformation Fccp-Cmo Fermi Hole Nmr Paracyclophane Perfluoro[2.2]Paracyclophane Through-Space |
topic |
19f Chemical Shifts 19f-19f Couplings Conformation Fccp-Cmo Fermi Hole Nmr Paracyclophane Perfluoro[2.2]Paracyclophane Through-Space |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.4 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
In the process of studying the chemistry of perfluoro[2.2]paracyclophanes (PFPCs), a novel class of compounds, it became necessary to identify some disubstituted products. To achieve this goal, we characterize in this work some monosubstituted PFPCs, identifying their 19F-19F coupling patterns, and establishing a methodology for the assignment of their 19F chemical shifts. The pattern of coupling constants indicates a skewed geometry in which the upper deck moves towards or away from the substituent, depending on the substituent electron-donor character and size. Quantum chemical calculations, performed at the HF/6-311 + G(d,p)//B3LYP/EPR-III level of theory, confirmed the conformations inferred from coupling constants and reproduced well the values of the couplings. Transmission mechanisms for the FC term of four-and five-bond 19F-19F couplings are discussed in detail. Understanding the conformational preferences of PFPCs and how they are reflected by the coupling constants facilitates the assignment of 19F chemical shifts in monosubstituted PFPCs and the identification of the disubstituted products. Copyright © 2011 John Wiley & Sons, Ltd. Fil: Ghiviriga, Ion. University of Florida; Estados Unidos Fil: Zhang, Lianhao. University of Florida; Estados Unidos Fil: Martinez, Henry. University of Florida; Estados Unidos Fil: Contreras, Ruben Horacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina Fil: Tormena, Cláudio F.. Universidade Estadual de Campinas; Brasil Fil: Nodin, Laura. University of Florida; Estados Unidos Fil: Dolbier Jr., William R.. University of Florida; Estados Unidos |
description |
In the process of studying the chemistry of perfluoro[2.2]paracyclophanes (PFPCs), a novel class of compounds, it became necessary to identify some disubstituted products. To achieve this goal, we characterize in this work some monosubstituted PFPCs, identifying their 19F-19F coupling patterns, and establishing a methodology for the assignment of their 19F chemical shifts. The pattern of coupling constants indicates a skewed geometry in which the upper deck moves towards or away from the substituent, depending on the substituent electron-donor character and size. Quantum chemical calculations, performed at the HF/6-311 + G(d,p)//B3LYP/EPR-III level of theory, confirmed the conformations inferred from coupling constants and reproduced well the values of the couplings. Transmission mechanisms for the FC term of four-and five-bond 19F-19F couplings are discussed in detail. Understanding the conformational preferences of PFPCs and how they are reflected by the coupling constants facilitates the assignment of 19F chemical shifts in monosubstituted PFPCs and the identification of the disubstituted products. Copyright © 2011 John Wiley & Sons, Ltd. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-02 |
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/11336/56984 Ghiviriga, Ion; Zhang, Lianhao; Martinez, Henry; Contreras, Ruben Horacio; Tormena, Cláudio F.; et al.; 19F chemical shifts, coupling constants and conformational preferences in monosubstituted perfluoroparacyclophanes; John Wiley & Sons Ltd; Magnetic Resonance in Chemistry; 49; 3; 2-2011; 93-105 0749-1581 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/56984 |
identifier_str_mv |
Ghiviriga, Ion; Zhang, Lianhao; Martinez, Henry; Contreras, Ruben Horacio; Tormena, Cláudio F.; et al.; 19F chemical shifts, coupling constants and conformational preferences in monosubstituted perfluoroparacyclophanes; John Wiley & Sons Ltd; Magnetic Resonance in Chemistry; 49; 3; 2-2011; 93-105 0749-1581 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.1002/mrc.2713 |
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 |
John Wiley & Sons Ltd |
publisher.none.fl_str_mv |
John Wiley & Sons Ltd |
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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1844613345603223552 |
score |
13.070432 |