Consider the acidity of the carboxylic acids PhCOOH o-NO2C6H4COOH p-NO2C6H4COOH m-NO2C6H4COOH Which of the following order is correct?

Question

Consider the acidity of the carboxylic acids PhCOOH o-NO2C6H4COOH p-NO2C6H4COOH m-NO2C6H4COOH Which of the following order is correct? (A)  I>II>III>IV  (B)  II>IV>III>I  (C)  II>IV>I>III  (D)  II>III>IV>I

Tardigrade Admin · Accepted Answer

(I) (II) (III) (IV) -NO2 group at any position shows electron withdrawing effect thus acid strength is increased. But o-nitro benzoate ion is stabilized by intramolecular H-bonding like forces hence its acid strength is maximum. Thus acid strength (II)>(III)>(IV)>(I)

Q. Consider the acidity of the carboxylic acids $P h COO H$ $o - N O_{2} C_{6} H_{4} COO H$ $p - N O_{2} C_{6} H_{4} COO H$ $m - N O_{2} C_{6} H_{4} COO H$ Which of the following order is correct?

$I > II > III > I V$

$II > I V > III > I$

$II > I V > I > III$

$II > III > I V > I$

(I)
(II)
(III)
(IV)
$- N O_{2}$ group at any position shows electron withdrawing effect thus acid strength is increased. But o-nitro benzoate ion is stabilized by intramolecular H-bonding like forces hence its acid strength is maximum. Thus acid strength $(II) > (III) > (I V) > (I)$

Q. Consider the acidity of the carboxylic acids PhCOOH o−NO2​C6​H4​COOH p−NO2​C6​H4​COOH m−NO2​C6​H4​COOH Which of the following order is correct?

I>II>III>IV

II>IV>III>I

II>IV>I>III

II>III>IV>I