STABILITY PROBLEM

JEE Advanced 2015 Tutorials › Organic Chemistry questions › STABILITY PROBLEM

Ans : V<III<I<II<IV

PLEASE EXPLAIN !!!

#Chemistry #Organic Chemistry

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6 Answers

29

govind ·2010-03-29 09:57:23

Yaar this question has been discussed here b4 also..see the stability of free radical is the same as the stability of carboaction..so sp³ hybridised free radical is more stable than sp² hybridised..

so V and III least stable
I is just simple free radical
Now we have conjugation in IV and II and IV is more conjugated then II

so order is
V < III < I < II < IV

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Grandmaster ·2010-03-29 10:01:41

i agree with govind and now comparing I with V.....I is just a normal free radical which has high energy but 5 is like an aryl system which is highly unstable!!!!!

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Bicchuram Aveek ·2010-04-02 10:11:21

Govind can you please tell me why V<III and not III<V ?

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Bicchuram Aveek ·2010-04-02 10:12:53

ANYONE ??

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sriraghav ·2010-04-02 10:17:25

In V the aromaticity is disturbed....whereas not in III

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The Enlightened One - jsg ·2010-04-02 11:00:43

see ,

V is antiaromatic while III is non aromatic...by aromaticity concept Stability of non aromatic > stability anti aromatic..

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