A) \[RCOC1\text{ }<\text{ }(RC{{O}_{2}}\text{)O }<\text{ }RCOOR\text{ }<\text{ }RCON{{H}_{2}}\]
B) \[RCOC1\text{ }{{(RCO\text{)}}_{2}}\text{O }RCOOR\text{ }RCON{{H}_{2}}\]
C) \[RCOC1\text{ }>\text{ }RCOOR\text{ }>\text{ }{{(RCO)}_{2}}O\text{ }>\text{ }RCON{{H}_{2}}\]
D) \[RCOC1\text{ }>\text{ }RCOOR\text{ }>\text{ }(RCON{{H}_{2}}\text{ }>\text{ (}RCO{{)}_{2}}O\]
Correct Answer: B
Solution :
The reactivity of acid derivatives towards nucleophilic acyl substitution reactions decreases in the following order \[RCOCl>{{(RCO)}_{2}}O>RCOOR>RCON{{H}_{2}}\] as the basicity of the leaving group increases as ie,\[C\,{{l}^{-}}<RCO{{O}^{-}}<R{{O}^{-}}<NH_{2}^{-}\]
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