Consider ethanal (acetylaldehyde) which can exist as a pair of tautomers in equilibrium. Calculate the SCF energies of keto and enol forms, convert to Kcal/mole and calculate their relative energy values.
Do the same for 2,2 difluoro ethanal and compare your results. How does the presence of the fluorine atoms effect the keto/enol ratio?
Explain your results thoroughly.
Next do the same for 2 nitro ethanal NO2-CH2-CHO.