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Volumn 76, Issue 12, 2011, Pages 4818-4830

Quantum-chemical simulation of 1H NMR spectra. 2. Comparison of DFT-based procedures for computing proton-proton coupling constants in organic molecules

Author keywords

[No Author keywords available]

Indexed keywords

ACCURATE PREDICTION; B3LYP/6-31G; BASIS FUNCTIONS; BASIS SETS; CHEMICAL SPACE; COMPUTATIONAL PROTOCOLS; CPU TIME; DENSITY FUNCTIONALS; FERMI CONTACT TERM; GAUSSIANS; H NMR SPECTRA; LINEAR SCALING; NUCLEAR COUPLING; ORGANIC MOLECULES; PROTON-PROTON COUPLING CONSTANTS; QUANTUM-CHEMICAL SIMULATIONS; RMS DEVIATIONS; ROOT-MEAN SQUARE DEVIATION; TEST SETS; TRAINING SETS;

EID: 79958837486     PISSN: 00223263     EISSN: 15206904     Source Type: Journal    
DOI: 10.1021/jo200513q     Document Type: Article
Times cited : (180)

References (52)
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    • It is this perturbation which is responsible for the transmission of the information on the magnetic moment of a given nucleus to the other nuclei and thus leads to the coupling of the nuclear spins
    • It is this perturbation which is responsible for the transmission of the information on the magnetic moment of a given nucleus to the other nuclei and thus leads to the coupling of the nuclear spins.
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    • We are perfectly aware of the fact that many molecules that practicing organic chemists face every day show some conformational flexibility. To properly account for this requires accurate relative free energies of different conformations, which constitutes a compounding factor that we wanted to exclude from our present analysis
    • We are perfectly aware of the fact that many molecules that practicing organic chemists face every day show some conformational flexibility. To properly account for this requires accurate relative free energies of different conformations, which constitutes a compounding factor that we wanted to exclude from our present analysis.
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    • This situation differs from that for chemical shifts, where a nonzero intercept reflects the fact that a chemical shift always represents a difference in magnetic shielding relative to some standard. Coupling constants, on the other hand, are absolute quantities, not referenced to a standard
    • This situation differs from that for chemical shifts, where a nonzero intercept reflects the fact that a chemical shift always represents a difference in magnetic shielding relative to some standard. Coupling constants, on the other hand, are absolute quantities, not referenced to a standard.
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    • In Gaussian, the WP04 functional is invoked by specifying the BLYP keyword and adding iop (3/76 = 1000001189, 3/77 = 0961409999, 3/78 = 0000109999) to the keyword line
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    • Other workers have also based predictions of proton coupling constants on calcualted FC terms alone, albeit with special basis set, decontracted and augmented on H-atoms
    • Other workers have also based predictions of proton coupling constants on calcualted FC terms alone, albeit with special basis set, decontracted and augmented on H-atoms: Diéz, E.; Casanueva, J.; San Fanian, J.; Esteban, A. L.; Galache, M. P.; Barone, V.; Peralta, J. E.; Contreras, R. H. Mol. Phys. 2005, 103, 1307
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    • Indeed, it has been established that for C-H coupling constants, it is at least sometimes important to include terms other than the Fermi contact term
    • Indeed, it has been established that for C-H coupling constants, it is at least sometimes important to include terms other than the Fermi contact term: Bagno, A.; Rastrelli, F.; Saielli, G. J. Phys. Chem. A. 2003, 107, 9964-9973
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    • We also investigated B3LYP/6-311G(d,p)u+1s and B3LYP/cc-pVTZ u+1s in this manner; full details appear in the Supporting Information
    • We also investigated B3LYP/6-311G(d,p)u+1s and B3LYP/cc-pVTZ u+1s in this manner; full details appear in the Supporting Information
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    • 1,2,3-Butatriene has both a cis and a trans coupling, but the two are extremely similar, and only an averaged value is available from experiment
    • 1,2,3-Butatriene has both a cis and a trans coupling, but the two are extremely similar, and only an averaged value is available from experiment.
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    • The group of Tantillo at UC Davies has set up a website called "Chemical Shift Repository" (CHESHIRE) where these scripts, including updated versions, are posted. See
    • The group of Tantillo at UC Davies has set up a website called "Chemical Shift Repository" (CHESHIRE) where these scripts, including updated versions, are posted. See: http://cheshirenmr.info.
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* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.