Theoretical NMR nJ(13C,13C) Scalar Couplings as Probes to Study Diamagnetic Ring Currents in Fullerenes
In this work J(13C,13C) coupling constants and the principal components of nuclear magnetic shielding constants in the C60, C70, and C60 (6−) fullerenes are calculated at the B3LYP/cc-pCVDZ-sd level using optimized B3LYP/cc-pCVDZ geometries. Indirect spin–spin couplings are utilized to study local d...
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| Formato: | Capítulo de libro |
| Lenguaje: | Inglés |
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2005
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| Acceso en línea: | Registro en Scopus DOI Handle Registro en la Biblioteca Digital |
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| LEADER | 02662caa a22003137a 4500 | ||
|---|---|---|---|
| 001 | PAPER-12866 | ||
| 003 | AR-BaUEN | ||
| 005 | 20250204092000.0 | ||
| 008 | 190411s2005 xx ||||fo|||| 00| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-84962465376 | |
| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 100 | 1 | |a Contreras, Rubén Horacio | |
| 245 | 1 | 0 | |a Theoretical NMR nJ(13C,13C) Scalar Couplings as Probes to Study Diamagnetic Ring Currents in Fullerenes |
| 260 | |c 2005 | ||
| 506 | |2 openaire |e Política editorial | ||
| 520 | 3 | |a In this work J(13C,13C) coupling constants and the principal components of nuclear magnetic shielding constants in the C60, C70, and C60 (6−) fullerenes are calculated at the B3LYP/cc-pCVDZ-sd level using optimized B3LYP/cc-pCVDZ geometries. Indirect spin–spin couplings are utilized to study local diamagnetic ring currents in fullerenes. In unsaturated carbon containing compounds, the Fermi contact (FC) contribution to long-range nJ(13C,13C) (n>4) coupling constants is mainly transmitted through the mobile π-electronic system following a few simple rules: the alternating sign-rule and the pathway invariance. Besides, the absolute value of such a coupling decreases slowly when increasing the number of bonds separating the coupled nuclei. Without explicitly addressing the controversial topic of the aromaticity of fullerenes, we show that the π-transmitted components of the FC contribution provide information on factors affecting ring currents in fullerenes. © 2005, Elsevier Inc. All rights reserved. |l eng | |
| 593 | |a Department of Physics, FCEyN, University of Buenos Aires and CONICET, Buenos Aires, Argentina | ||
| 593 | |a Department of Chemistry, Rice University, Houston, TX 77005-1892, United States | ||
| 700 | 1 | |a Peralta, J.E. | |
| 700 | 1 | |a Barone, V. | |
| 700 | 1 | |a Scuseria, G.E. | |
| 773 | 0 | |d 2005 |g v. 48 |h pp. 127-139 |k n. 1C |p Adv. Quantum Chem. |x 00653276 |w (AR-BaUEN)CENRE-1230 |t Advances in Quantum Chemistry | |
| 856 | 4 | 1 | |u https://www.scopus.com/inward/record.uri?eid=2-s2.0-84962465376&doi=10.1016%2fS0065-3276%2805%2948009-0&partnerID=40&md5=cad3f6b8a3156a143bee1fd07b4f0593 |y Registro en Scopus |
| 856 | 4 | 0 | |u https://doi.org/10.1016/S0065-3276(05)48009-0 |y DOI |
| 856 | 4 | 0 | |u https://hdl.handle.net/20.500.12110/paper_00653276_v48_n1C_p127_Contreras |y Handle |
| 856 | 4 | 0 | |u https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00653276_v48_n1C_p127_Contreras |y Registro en la Biblioteca Digital |
| 961 | |a paper_00653276_v48_n1C_p127_Contreras |b paper |c PE | ||
| 962 | |a info:eu-repo/semantics/article |a info:ar-repo/semantics/artículo |b info:eu-repo/semantics/publishedVersion | ||
| 999 | |c 73819 | ||