Question

78. a. Which is a stronger acid? OHے OH b. Which is a stronger base? . . . . .

Answer 1

ОН H- (1 ) oh

us will be more position. So the by phenyl ring because of meta "I be more occdic as phenyl ring and -OH are at para- on. So the ion formed after losing it will be stabilised Phenyl ring because of resonance as well as I inductive effect of phenyl ring). while in in-Oh and phenyl ring are at mole position so here The stabilisation of ion by pheny rung is due to I effect of phenyl ring only More stability of ion formed a more stronger is the corresponding acid So i is more acidic. ОН 1 + Aromatic rung is formed cation (Highly OH on stable) + HO Antiaromatic cation is formed (unstable) from The cation formed in ij is highly stable as it is a aromatic cation (Un +2x electrons = 6 elections) while, wil is cation is highly unstable as it is antiaromatic cation (407 electrons = 4). So w will show basic nature (1) is basic

O OH OH + HO CUP In ci aromatic alcohol is formed which is very stable. So w is more basic while in wij stabilisation is only due to roonance (no romatic character).