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Chemistry Question on Coordination Compounds

Consider the following compounds:compoundsArrange these compounds in the increasing order of rate of hydrolysis:

A

(B) < (D) < (C) < (A)

B

(B) < (D) < (A) < (C)

C

(D) < (B) < (A) < (C)

D

(A) < (D) < (B) < (C)

Answer

(B) < (D) < (A) < (C)

Explanation

Solution

The rate of hydrolysis depends on the electron-withdrawing and electron-donating effects of substituents. Compound (B) with an electron-donating hydroxyl group has the slowest hydrolysis rate. Compound (C) with a strong electron-withdrawing nitro group increases the hydrolysis rate, while compound (A) with an aldehyde and compound (D) without any substituent show intermediate rates.The correct order of increasing rate of hydrolysis is (B) < (D) < (A) < (C).