Alcohols Phenols And Ethers Question 91
Question: The order of reactivity of the following alcohols towards cone. $ HCl $ is
(I) (II) (III) (IV)
Options:
A) I>II>III>IV
B) I>III>II>IV
C) IV>III>II>I
D) IV>III>I>II
Show Answer
Answer:
Correct Answer: C
Solution:
[c] The order of reactivity depends upon the stability of the carbocations formed. Remember that presence of electron-withdrawing roup intensifies i.e., destabilises the carbocation thus (i) and (ii) are less stable than (iii). Further (i) is less stable than (ii) because -I effect is more pronounced in (i) due to less distance between F and positive charge. Thus the stability order of the four carbocations and reactivity of their parent alcohols will be IV > III > II > I
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