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Volumn 118, Issue 23, 2003, Pages 10407-10417

Quantitative prediction of gas-phase 13C nuclear magnetic shielding constants

Author keywords

[No Author keywords available]

Indexed keywords

APPROXIMATION THEORY; COMPUTATIONAL METHODS; COMPUTER SIMULATION; CONVERGENCE OF NUMERICAL METHODS; ELECTRON TRANSPORT PROPERTIES; MOLECULAR VIBRATIONS; NUCLEAR MAGNETIC RESONANCE; PERTURBATION TECHNIQUES; PROBABILITY DENSITY FUNCTION;

EID: 0037804155     PISSN: 00219606     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.1574314     Document Type: Article
Times cited : (256)

References (123)
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    • U. Fleischer, W. Kutzelnigg, and C. V. Wüllen, in Encyclopedia of Computational Chemistry, edited by P.v.R. Schleyer, N.L. Allinger, T. Clark, J. Gasteiger, P. Kollman, H.F. Schaefer, and P.R. Schreiner (Wiley, Chichester, 1998), p. 1827.
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  • 8
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    • edited by P.v.R. Schleyer, N.L. Allinger, T. Clark, J. Gasteiger, P. Kollman, H.F. Schaefer, and P.R. Schreiner (Wiley, Chichester)
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    • (1998) Encyclopedia of Computational Chemistry , pp. 1835
    • Bühl, M.1
  • 32
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    • (unpublished results)
    • the GIAO-CCSD(T) calculations reported in this reference have been carried out by J.F. Stanton (unpublished results).
    • Stanton, J.F.1
  • 52
    • 0346997584 scopus 로고
    • as well as in Ref. 10
    • A detailed discussion of the gauge problem can be found, for example, in W. Kutzelnigg, J. Mol. Struct.: THEOCHEM 202, 11 (1989) as well as in Ref. 10.
    • (1989) J. Mol. Struct.: THEOCHEM , vol.202 , pp. 11
    • Kutzelnigg, W.1
  • 99
    • 0001136801 scopus 로고
    • edited by K.N. Rao and C.W. Matthews (Academic, New York)
    • I.M. Mills, in Molecular Spectroscopy: Modern Research, edited by K.N. Rao and C.W. Matthews (Academic, New York, 1972), p. 115.
    • (1972) Molecular Spectroscopy: Modern Research , pp. 115
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  • 100
    • 0037605072 scopus 로고    scopus 로고
    • note
    • s,... as well as the fact that the nth derivative of the shielding tensor is considered to be of nth order.
  • 108
    • 0038280402 scopus 로고    scopus 로고
    • note
    • ref corresponds here to the (experimental) relative shift for the reference compound chosen to convert the absolute shieldings to the usual relative scale.
  • 109
    • 0037943194 scopus 로고    scopus 로고
    • note
    • Note that methane has been chosen, since the usual reference compound tetrametylsilane (TMS) is too large for the current study. In addition, the use of TMS would have led to additional complications due to the nonunique choice of the appropriate silicon basis.
  • 110
    • 0038619344 scopus 로고    scopus 로고
    • note
    • 4 is used as theoretical reference. Results are typically much better if tetramethylsilane (TMS) is chosen as reference in the computations.
  • 111
    • 0038280406 scopus 로고    scopus 로고
    • note
    • 4. All values should be reduced by 6 ppm,thus improving the aggreement with experiment slightly and yielding results of similar accuracy as in the DFT-BP86 calculations.
  • 112
    • 0037943193 scopus 로고    scopus 로고
    • note
    • It should be noted that it is well known in the literature that standard DFT leads to an overestimation of the paramagnetic contribution and thus yields too low shielding constants. This is also the reason why Malkin et al. (Ref. 42) suggested an empirical modification of the orbital-energy denominator in the sum-over-states DFT formulation of nuclear magnetic shieldings constants.
  • 116
    • 24844457004 scopus 로고    scopus 로고
    • note; (unpublished)
    • Note that such calculations are currently not possible for NMR chemical shieldings. However, a first step has been achieved by the recent implementation of analytic gradients for general CC methods [M. Källay, J. Gauss, and P.G. Szalay (unpublished)].
    • Källay, M.1    Gauss, J.2    Szalay, P.G.3
  • 117
    • 0037206782 scopus 로고    scopus 로고
    • note
    • An interesting ansatz to estimate the basis-set limit in NMR chemical shielding calculations has been presented by Kupka et al. [T. Kupka, B. Ruscic, and R.E. Botto, J. Phys. Chem. A 106, 10396 (2002)], although the accuracy of the extrapolated results is currently unknown.
    • (2002) J. Phys. Chem. A , vol.106 , pp. 10396
    • Kupka, T.1    Ruscic, B.2    Botto, R.E.3


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.