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Volumn 74, Issue 19, 2009, Pages 7254-7260

A multi-standard approach for GIAO 13C NMR calculations

Author keywords

[No Author keywords available]

Indexed keywords

ACCURACY AND PRECISION; BASIS SETS; CARBON ATOMS; COMPUTATIONAL COSTS; MULTI-STANDARD; NMR CHEMICAL SHIFTS; REFERENCE STANDARD;

EID: 70349462963     PISSN: 00223263     EISSN: None     Source Type: Journal    
DOI: 10.1021/jo901234h     Document Type: Article
Times cited : (208)

References (67)
  • 6
    • 67449092793 scopus 로고    scopus 로고
    • For recent references, see: (a)
    • For recent references, see: (a) Smith, S. G.; Goodman, J. M. J. Org. Chem. 2009, 74, 4597-4607.
    • (2009) J. Org. Chem. , vol.74 , pp. 4597-4607
    • Smith, S.G.1    Goodman, J.M.2
  • 52
    • 70349447450 scopus 로고    scopus 로고
    • (d) http://riodb01.ibase.aist.go.jp/sdbs/.
  • 53
    • 70349444337 scopus 로고    scopus 로고
    • note
    • It is well-known that magnetic shielding values frequently show a strong conformational dependence. If a molecule has more than one significantly populated conformer, then a prediction of chemical shifts requires a separate calculation for each conformer, followed by the calculation of the Boltzmann-weighted average. The assumption that neglecting the contributions of other low-energy conformers do not affect the results might be questionable. However, we found that for the chosen compounds the chemical shifts calculated using the global minima and all significant conformers showed no significant variations. This issue is discussed in more detail in the Supporting Information.
  • 60
    • 70349444338 scopus 로고    scopus 로고
    • note
    • Throughout this study, we will use this term. In order to avoid misinterpretation, we aim to clarify that the type of hybridization refers only to the carbons of compounds shown in Figure 1 and not to the carbons of the reference standards.
  • 61
    • 70349439921 scopus 로고    scopus 로고
    • note
    • Since the functional mPW1PW91 gave slightly lower MAD and RMS errors than B3LYP, the first was selected for the GIAO NMR calculations.
  • 63
    • 70349454899 scopus 로고    scopus 로고
    • note
    • For detailed discussion on this issue, see the Supporting Information.
  • 67
    • 84961980477 scopus 로고    scopus 로고
    • For a review on continuum solvation models, see
    • For a review on continuum solvation models, see: Tomasi, J.; Mennucci, B.; Cammi, R. Chem. Rev. 2005, 105, 2999-3093.
    • (2005) Chem. Rev. , vol.105 , pp. 2999-3093
    • Tomasi, J.1    Mennucci, B.2    Cammi, R.3


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.