You know of course, you have to characterize all new products in you synthesis.
So, you can make in a fist time measures as :1. Melting point
or the 2. Boiling point
3. The best is all the world of the spectroscopy as UV-Vis, IR, (isotops 1H, 13C 19F…), mass, HPLC, MS,….
Here you can show from an organic formula the spectras:
Characteristic table IR-frequencies:
All about UV-Vis characteririsation: