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Lecture 4 - Resonance and area of delocalization O O HO CH3...

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O O HO CH 3 HO CH 3 O O O O CH 3 O CH 3 O O O O CH 3 O CH 3 O O O O CH 3 O CH 3 O A A B B A: The larger area of delocatization (spread), the more stable the A: The larger area of delocatization (spread), the more stable the resonance is. resonance is. B: the smaller area, the less stable (relatively). B: the smaller area, the less stable (relatively). Resonance and area of delocalization Resonance and area of delocalization
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Writing Organic Structures How many protons are there on each carbon? Et = ethyl = -CH 2 CH 3
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How many protons are there on carbon a and b, respectively? a b d c A. A. 3,2 3,2 B. B. 2,1 2,1 C. C. 1,2 1,2 D. D. 2,0 2,0 E. E. 1,1 1,1
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How many protons are there on carbon c and d, respectively? a b d c A. A. 3,2 3,2 B. B. 2,1 2,1 C. C. 1,2 1,2 D. D. 2,0 2,0 E. E. 1,1 1,1
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A. A. 0,1 0,1 B. B. 1,2 1,2 C. C. 2,3 2,3 D. D. 1,0 1,0 E. E. 1,1 1,1 f e h g How many protons are there on carbon g and h, respectively?
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How many protons are there on carbon e and f, respectively? A. A. 0,1 0,1 B. B. 1,2 1,2 C. C. 2,3 2,3 D. D. 1,0 1,0 E. E. 1,1 1,1 f e h g
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H 3 CO H 3 CO H 3 CO H 3 CO WRONG H 3 CO CH 3 H 3 CO CH 3 H H Details Identification of conjugation Identification of conjugation
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H 3 CO H 3 CO H 3 CO H 3 CO H 3 CO H 3 CO H H H H H H Conjugated Conjugation broken by saturated carbons Identification of conjugation Identification of conjugation Any carbon with pi electrons is unsaturated.
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The Shapes of Some Simple Molecules The Shapes of Some Simple Molecules Basic structural elements Basic structural elements
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attached to a central atom is the one that has the maximum separation of electron pairs (bonded or nonbonded). Valence Shell Electron Pair Repulsions
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Lecture 4 - Resonance and area of delocalization O O HO CH3...

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