The nuclear magnetic F spectrum (19F NMR) shifts towards lower or higher fields when hydrogen bonds are formed between H atoms and F atoms?
Luc Alders
Organic fluorine hardly even engages in hydrogen bonding, but it is possible, see for example this paper:
Article Intramolecular Hydrogen Bonding Involving Organic Fluorine: ...
Generally, in hydrogen bonding, electron density is drawn away from the proton donor atom to the electronegative acceptor atom. The proton gets de-shielded and shifts to higher ppm. The acceptor atom gets more shielded and should shift to lower ppm. Therefore, IF the fluorine in your particular case is engaging in hydrogen bonding, it should shift to a lower ppm value.
You might also see through-space J-F coupling if it does.
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