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15 Cards in this Set
- Front
- Back
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stability of resonance structures |
^ stability = ^ delocalization energy |
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resonance contributor rules |
1. ^ stability = ^ contribution 2. ^ number contributors = ^ delocalization energy 3. ^ equivalency = ^ delocalization energy |
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Isolated vs. conjugated dienes |
isolated = separated by more than 1 single bond conjugated = separated by 1 single bond more stable bc ^ # resonance structures |
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Benzylic cation
5 resonance structures |
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1,2 addition reaction |
occurs in conjugated dienes forms faster kinetic product
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1,4 addition reaction |
adds to 1 and 4 position moves double bond over thermodynamic product |
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kinetic product |
irreversible forms most rapidly occurs at low temps 1,2 addition |
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thermodynamic product |
reversible most stable occurs at high temps 1,4 addition |
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Diels-Alder reaction |
conjugated diene (C=C-C=C) + dienophile (C=C)
= cyclic molecule with R substituent
(1,4 addition) |
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pericyclic reaction |
reaction taking place in one step by a cyclic shift in electrons |
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cycloaddition reaction |
reaction in which two reactants form a cyclic product |
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concerted reaction |
things occurring in the same step |
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cyclic dienes |
form bridged bicyclic compounds |
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exo configuration |
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endo configuration
(diels alder rxns are endo-selective) |
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