enol

VITEEE 2015 Preparation › Organic Chemistry questions › enol

point out the more stable enol...

A) Ph-C(OH)=CH-COOEt

B) CH3-C(OH)=CH-Câ‰¡N

#Chemistry #Organic Chemistry

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661

Gaurav Gardi ·2013-02-24 09:06:28

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Hardik Sheth explain..
Upvote·0· Reply ·2013-02-24 09:09:12
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Gaurav Gardi ·2013-02-24 09:39:27

In (A) conjugation is more than that in (b)
also in (a) the negative charge appears on oxygen of c=0
but in(B)
it appears in N which is less electronegative than oxygen.

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Hardik Sheth given ans is b
Upvote·0· Reply ·2013-02-24 10:30:19
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Dwijaraj Paul Chowdhury ·2013-02-24 15:56:57

B has 3 resonating structures while b has 4 nd resonance>hyperconjugation

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101

Anurag Roy ·2013-02-24 23:05:16

b has one e withdrawing group
while a has two so b

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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

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