Abstract
Abstract 15N NMR Spectroscopy is one of the most powerful tools to study the structure of organic molecules.1–3 δ2 -pyrazolines 1 are heterocyclic hydrazones, which as a result of their cyclic structure, are stable in acidic media. Thus, their protonation has been studied by 1H and 13C NMR spectroscopies.4,5 Pyrazolines are protonated and quaternarized at N1 2 and 3. It is possible to obtain the isomeric quaternary salts 4 by C-protonation of δ3 -pyrazolines.6
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
