Prediction of (19)F NMR Chemical Shifts for Fluorinated Aromatic Compounds.
Prediction of (19)F NMR Chemical Shifts for Fluorinated Aromatic Compounds.
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DOI:
10.1021/acs.joc.8b00104
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发表时间:
2018-03-16
期刊:
影响因子:
--
通讯作者:
Tantillo DJ
中科院分区:
文献类型:
--
作者:
Saunders C;Khaled MB;Weaver JD 3rd;Tantillo DJ
Scaling factors are reported for use in predicting 19F NMR chemical shifts for fluorinated (hetero)aromatic compounds with relatively low levels of theory. Our recommended scaling factors were developed using a curated data set of >50 compounds, with 100 individual 19F shifts spanning a range of >150 ppm. With a maximum deviation of 6.5 ppm between experimental and computed shifts, or 4% of the range tested, these scaling factors allow for the assignment of chemical shifts to specific fluorines in multifluorinated aromatics. The utility of this approach is highlighted by several structural reassignments.
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