Order of hydrolysis for the following: (I) RCOCl (II) RCOOR (III) RCONH2 (IV) (RCO)2O

Question

Order of hydrolysis for the following: (I) RCOCl (II) RCOOR (III) RCONH2 (IV) (RCO)2O  (A)  I>IV>II>III  (B)  I>II>III>IV  (C)  I>III>II>IV  (D)  IV>III>II>I

Tardigrade Admin · Accepted Answer

(i) Acid chlorides is most reactive and is hydrolysed slowly by water as follows:

C H_{3} COCl + H_{2} O \to C H_{3} COO H + H Cl

(ii) Acid anhydrides are less reactive than acid chlorides.
They are hydrolysed slowly by water.

(C H_{3} CO)_{2} O + H_{2} O \to 2 C H_{3} COO H

(iii) Ester are hydrolysed slowly by water in presence of acid or alkali.

RCOOR + H_{2} ORCOO H + RO H

(iv) Amides are hydrolysed very slowly by water.

R - C ∣∣ O - N H_{2} + H_{2} O H^{+} RCOO H + N H_{3}

∴

The correct order of hydrolysis is:

RCOCl > (RCO)_{2} O > RCOOR > RCON H_{2}

Q. Order of hydrolysis for the following : (I) $RCOCl$ (II) $RCOOR$ (III) $RCON H_{2}$ (IV) $(RCO)_{2} O$

$I > I V > II > III$

$I > II > III > I V$

$I > III > II > I V$

$I V > III > II > I$

Q. Order of hydrolysis for the following : (I) RCOCl (II) RCOOR (III) RCONH2​ (IV) (RCO)2​O

I>IV>II>III

I>II>III>IV

I>III>II>IV

IV>III>II>I

Q. Order of hydrolysis for the following : (I) $RCOCl$ (II) $RCOOR$ (III) $RCON H_{2}$ (IV) $(RCO)_{2} O$

$I > I V > II > III$

$I > II > III > I V$

$I > III > II > I V$

$I V > III > II > I$