Umemoto, Teruo published the artcileN-F 19-fluorine nuclear magnetic resonance of N-fluoropyridinium salts, HPLC of Formula: 107263-95-6, the publication is Journal of Fluorine Chemistry (1991), 53(3), 369-77, database is CAplus.
The completely ionic structure of N-fluoropyridinium salts is supported by their N-F 19F chem. shifts which are independent of the nature of the counteranions. The 19F chem. shifts of β- and γ-substituted N-fluoropyridinium salts are both correlated to pKa values of the corresponding pyridines, but in different ways. However, the shifts of α-substituted N-fluoro salts except for those with alkyl substituents were abnormally shifted upfield due to nonbonded electronic interactions, regardless of their pKa’s. The relationship between variable fluorinating power and 19F chem. shifts of N-fluoropyridinium salt is also discussed.
Journal of Fluorine Chemistry published new progress about 107263-95-6. 107263-95-6 belongs to pyridine-derivatives, auxiliary class Fluorination reagent, name is 1-Fluoropyridiniumtriflate, and the molecular formula is C27H39ClN2, HPLC of Formula: 107263-95-6.
Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem