1、Table of Chemical Shift RangesType of Compound Chemical Shift Range (ppm)Relative to neat CFCl3 -F-C=O -70 to -20 -CF3- +40 to +80 -CF2- +80 to +140 -CF- +140 to +250 -ArF- +80 to +170 Chemical Shift Table For certain compounds, the listed chemical shift pertains to the F shown in bold. The pr
2、imary references for these values are:1) the 1991 Bruker Almanac, and2) Compilation of reported F19 NMR chemical shifts, 1951 to mid-1967 by Claude H. Dungan and John R. Van Wazer. Negative shifts are those that appear upfield of CFCl3 and positive shifts are those that appear downfield. Compoun
3、d Chemical Shift (ppm)Relative to neat CFCl3 CFCl3 0.00 MeF -271.9 CF3H (in CFCl3) -78.6 CF3H (in EtO) -78.6 CF2H2 -143.6 EtF -213 FCH=CH2 -114 F2C=CH2 -81.3 F2C=CF2 -135 CF3COOH (in CFCl3) -76.55 CF3COOH (neat) -78.5 CF3COOH (in CCl4 -76.3 CF3COOC6H6 -73.85 CF3COOCH2C6H6 -75.02 CF3COOCH3 -74.21