Abstract:
In this work, a new approach to studying coupling pathways for the Fermi contact term of NMR spin-spin coupling constants (SSCCs) is presented. It is based on the known form of propagating the Fermi hole through a canonical molecular orbital (CMO). It requires having an adequate spatial description of the relevant canonical molecular orbitals, which are obtained by expanding CMOs in terms of natural bond orbitals (NBOs). For detecting the relevant contributions of CMOs to a given Fermi contact (FC) pathway, the description of the FC in terms of the triplet polarization propagator (PP) is used. To appreciate the potential of this approach, dubbed FCCP-CMO (Fermi contact coupling pathways-CMO), it is applied to analyze the through-space transmission of the FC term of JPP SSCCs by overlap of the P lone pairs. This method can be applied using well-known quantum chemistry software without any further modification, which makes it appealing for use as a complement to SSCC measurements by NMR spectroscopy. © 2010 American Chemical Society.
Registro:
Documento: |
Artículo
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Título: | Analysis of canonical molecular orbitals to identify fermi contact coupling pathways. 1. Through-space transmission by overlap of 31P lone Pairs |
Autor: | Contreras, R.H.; Gotelli, G.; Ducati, L.C.; Barbosa, T.M.; Tormena, C.F. |
Filiación: | Department of Physics, FCEyN, University of Buenos Aires, Buenos Aires, Argentina CONICET, Buenos Aires, Argentina Department of Pharmaceutical Technology, FFyB, University of Buenos Aires, Buenos Aires, Argentina Organic Chemistry Department, Chemistry Institute, University of Campinas, P.O. Box 6154, 13084-971 Campinas, São Paulo, Brazil
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Palabras clave: | Fermi contact; Fermi contact term; Fermi holes; Lone pair; Natural bond orbital; New approaches; NMR spectroscopy; Space transmission; Spatial descriptions; Spin-spin coupling constants; Chemical bonds; Molecular modeling; Molecular orbitals; Nuclear magnetic resonance; Nuclear magnetic resonance spectroscopy; Spin dynamics; Fermions; organophosphorus compound; phosphorus; phosphorus derivative; algorithm; article; chemical structure; chemistry; conformation; methodology; nuclear magnetic resonance spectroscopy; physical chemistry; quantum theory; Algorithms; Magnetic Resonance Spectroscopy; Models, Molecular; Molecular Conformation; Organophosphorus Compounds; Phosphorus; Phosphorus Compounds; Physicochemical Phenomena; Quantum Theory |
Año: | 2010
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Volumen: | 114
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Número: | 2
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Página de inicio: | 1044
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Página de fin: | 1051
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DOI: |
http://dx.doi.org/10.1021/jp908970f |
Título revista: | Journal of Physical Chemistry A
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Título revista abreviado: | J Phys Chem A
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ISSN: | 10895639
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CODEN: | JPCAF
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CAS: | phosphorus, 7723-14-0; Organophosphorus Compounds; Phosphorus, 7723-14-0; Phosphorus Compounds
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10895639_v114_n2_p1044_Contreras |
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Citas:
---------- APA ----------
Contreras, R.H., Gotelli, G., Ducati, L.C., Barbosa, T.M. & Tormena, C.F.
(2010)
. Analysis of canonical molecular orbitals to identify fermi contact coupling pathways. 1. Through-space transmission by overlap of 31P lone Pairs. Journal of Physical Chemistry A, 114(2), 1044-1051.
http://dx.doi.org/10.1021/jp908970f---------- CHICAGO ----------
Contreras, R.H., Gotelli, G., Ducati, L.C., Barbosa, T.M., Tormena, C.F.
"Analysis of canonical molecular orbitals to identify fermi contact coupling pathways. 1. Through-space transmission by overlap of 31P lone Pairs"
. Journal of Physical Chemistry A 114, no. 2
(2010) : 1044-1051.
http://dx.doi.org/10.1021/jp908970f---------- MLA ----------
Contreras, R.H., Gotelli, G., Ducati, L.C., Barbosa, T.M., Tormena, C.F.
"Analysis of canonical molecular orbitals to identify fermi contact coupling pathways. 1. Through-space transmission by overlap of 31P lone Pairs"
. Journal of Physical Chemistry A, vol. 114, no. 2, 2010, pp. 1044-1051.
http://dx.doi.org/10.1021/jp908970f---------- VANCOUVER ----------
Contreras, R.H., Gotelli, G., Ducati, L.C., Barbosa, T.M., Tormena, C.F. Analysis of canonical molecular orbitals to identify fermi contact coupling pathways. 1. Through-space transmission by overlap of 31P lone Pairs. J Phys Chem A. 2010;114(2):1044-1051.
http://dx.doi.org/10.1021/jp908970f