Organophosphorus chemistry: from model to application

• György Keglevich

Beilstein J. Org. Chem. 2023, 19, 89–90, doi:10.3762/bjoc.19.8

• studied by single-crystal X-ray diffraction by Khrizanforov et al., and the preferred conformations were substantiated by DFT calculations [6]. Finally, Hersh and Chan presented a method to improve the accuracy of 31P NMR chemical shift calculations by use of scaling methods [7]. György Keglevich Budapest

Improving the accuracy of ³¹P NMR chemical shift calculations by use of scaling methods

• William H. Hersh and
• Tsz-Yeung Chan

Beilstein J. Org. Chem. 2023, 19, 36–56, doi:10.3762/bjoc.19.4

• series of tri- and tetracoordinate phosphorus compounds using several basis sets and density functional theory (DFT) functionals gave a modest fit to experimental chemical shifts, but an excellent linear fit when plotted against the experimental values. The resultant scaling methods were then applied to

• /RMSD = 6.9/8.5 ppm and 6.8/9.1 ppm, respectively, over an experimental chemical shift range of −181 to 356 ppm. Due to the unexplained failures observed, we recommend use of more than one method when looking at novel structures. Keywords: calculations; DFT; phosphorus NMR; scaling methods

• at a time. In the same way that improved results are obtainable for both 1H and 13C NMR chemical shifts using scaling methods, calculation of 31P NMR chemical shifts benefit as well from scaling. Chesnut first showed that scaling of the paramagnetic term of chemical shieldings calculated using the