Question

MULTIPLE CHOICE Which alpha proton in the molecule below is the most acidic? dc toiteli Zoom А D С D 1 of 15 > >

Answer 1

ore o b nell "Det a keto-group. Type of alpha proton bonded to carbon atom type linked to b type linked to two ester-group and phenyl-ving (bexzylic position), re- type linked to two kelo-groups and (benzylic position), a pheryl ting one de type liked to thon keto group. and one ester group. - ola) ya R "elty CH₂ K Base i H R CH2 - H by Now negative charge on alpha-carbon can be stabilized keto-group more effectively than ester-group. so 'e'-type alpha proton in the modecule above is most acidic. Aus wer- option'e'.

Hobond' ů - s a keto form end form D » No extra stab stability > be Habond - o- Ho لے on the o 'e' 0-4 IL 0 O-H ..-H O keto form enol form It gains aromatic Character. so it nighly (Huckel's Arom Aromaticity) is stable, So enl form of compound 'e exist in the highest percentage enol form.