Improving the Accuracy of Computed <sup>13</sup>C NMR Shift Predictions by Specific Environment Error Correction: Fragment Referencing
作者:Keith G. Andrews、Alan C. Spivey
DOI:10.1021/jo401833b
日期:2013.11.15
transformations (CSGT) 13C NMR spectra prediction by Density Functional Theory (DFT) at the B3LYP/6-31G** level is shown to be usefully enhanced by employing a ‘fragment referencing’ method for predictingchemicalshifts without recourse to empirical scaling. Fragment referencing refers to a process of reducing the error in calculating a particular NMRshift by consulting a similar molecule for which the error