Use the buttons to display the dipoles, charges and electrostatic potential mapped onto the surface of each molecule. Red regions are nucleophilic (electron rich) and blue regions are electrophilic (electron poor).
The largest coefficient of the HOMO and the red section of the electrostatic surfaces show that reactions with electrophiles e.g. trifluoroacetic anhydride occur on the “ears”.
More molecules: Small Polar | Conjugated | Lone Pair Conjugation | Carbonyl Hydration