A) \[i>iii>ii\]
B) \[i>ii>iii\]
C) \[ii>i>iii\]
D) \[iii>i>ii\]
Correct Answer: C
Solution :
: In active methylene compound (ii), methylene \[(-C{{H}_{2}})\] group exists in between two strong EWGs i.e. \[(-C{{H}_{3}}CO-)\], which increases the acidity. Esters (iii) are less acidic than ketones (i) because the enolate ion produced from an ester is less stable than that produced from a ketone. Hence, \[C{{H}_{3}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-\underset{(ii)}{\mathop{C{{H}_{2}}}}\,-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-C{{H}_{3}}\] \[>C{{H}_{3}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-\underset{(i)}{\mathop{C{{H}_{2}}}}\,-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-O{{C}_{2}}{{H}_{5}}\] \[>{{C}_{2}}{{H}_{5}}O-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-\underset{(iii)}{\mathop{C{{H}_{2}}}}\,-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-O-{{C}_{2}}{{H}_{5}}\]
You need to login to perform this action.
You will be redirected in
3 sec
