1-chlorobutane |
CH-I: 2.0 - 4.0 ppm
CH-Br: 2.7 - 4.1 ppm
CH-Cl: 3.1 - 4.1 ppm
CH-F: 4.2 - 4.8 ppm
Obviously the shifts can be related to electronegativities of the halides.
Coupling can happen with 19F, which has a spin of ½:
CH-F: 50 Hz
CH-C-F: 20 Hz
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