1ans is (a)
The correct order of rate of acid catalyzed hydration of following compounds is :
(A) II > I > IV > III
(B) III > I > IV > II
(C) I > III > IV > II
(D) III > IV > II > I
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9 Answers
39Kinetically II will be hydrated most quickly(no resonance involved). So rate of hydration of II would be maximum. Then with increasing resonance, increasing time is taken. Resonance doesn't occur in I as vinyl carbocation is formed, however unstable.
So (a) is correct...
19HOW THE HELL ON EARTH CAN YOU SAY (A) ??? [11]
III provides the benzylic carbocation,,,the most coveted site for hydration and hence it leads the way ! so (d) is definitely correct ! after that you have IV because a hydride shift produces a benzylic carbocation again !
1no its D only ........
see
vinylic carbocation is extremely unstable
and the 3 one is extremely stable which leads to very high rate of its formation by le chatekiers priciple , i.e stabler the product more fast will be the forward rxn
23are how can A be the ans pritish , it has to be D , if Ea is itself high , then too you are expecting its rate to be faster ??[11]
1ANS is d
it can be explained on the basis of carbocation stability.