STABILITY PROBLEM

JEE Mains 2015 Online › Organic Chemistry questions › STABILITY PROBLEM

Ans : V<III<I<II<IV

PLEASE EXPLAIN !!!

#Chemistry #Organic Chemistry

UP 0 DOWN 0 3 6
Post on FacebookPost anonymously?

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

UP 0 DOWN 0
Post on FacebookPost anonymously?

1

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!!!!!

UP 0 DOWN 0
Post on FacebookPost anonymously?

1

Bicchuram Aveek ·2010-04-02 10:11:21

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

UP 0 DOWN 0
Post on FacebookPost anonymously?

1

Bicchuram Aveek ·2010-04-02 10:12:53

ANYONE ??

UP 0 DOWN 0
Post on FacebookPost anonymously?

1

sriraghav ·2010-04-02 10:17:25

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

UP 0 DOWN 0
Post on FacebookPost anonymously?

1

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..

UP 0 DOWN 0
Post on FacebookPost anonymously?

Your Answer

Basic Integral Calculus Operators Symbols Matrix Cases

√ √ || {} [] () → ~ ^ x x x → → ln log lg lim lim cos sin tan cot arcsin arccos arctan

∫ ∫ ∫ ∫ ∫ ∬ ∬ ∬ ∬ ∬ ∭ ∭ ∭ ∭ ∭ ⨌ ⨌ ⨌ ⨌ ⨌

∑ ∑ ∑ ∑ ∑ ∮ ∮ ∮ ∮ ∮ ∏ ∏ ∏ ∏ ∏ ∐ ∐ ∐ ∐ ∐

+ - × ÷ ± ∓ = ∪ ∩ ≠ ∼ ≈ ∅ ∀ ∃ ∈ ∋ ∝ ≤ ≥ ≃ ≅ ≡ < > ≪ ≫ ⊂ ∉ ⊃ ⊆ ⊇ ⇒ ⇐ ⇔ ⇒ ⇐ ⇔ ⇑ ⇓ ⇕ → ← ↔ → ← ↔ ↑ ↓ ↕ ↖ ↗ ↘ ↙ ↪ ↩ ⇀ ↼ ⇁ ↽

° ∂ ∞ α β γ δ θ λ μ ν ξ π ρ σ φ ω ε ƒ κ τ υ Γ Δ Λ Σ Π Ω