orgo weel 2 notes
orgo weel 2 notes Chem 2400
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This 2 page Class Notes was uploaded by Brooke Martin on Friday September 9, 2016. The Class Notes belongs to Chem 2400 at Georgia State University taught by Reber in Fall 2017. Since its upload, it has received 6 views. For similar materials see Organic Chemistry 1 in Chemistry at Georgia State University.
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Date Created: 09/09/16
Organic Chemistry MWF 12:00 PM Week 2 Notes September 2, 2016 RESONANCE STRUCTURES 1. Combination of different form 2. Only electrons move 3. Don’t have to be equivalent 4. Must be valid Lewis structures BEST RESONANCE STRUCTURES 1. Obey octet rule 2. Maximize number of covalent bonds 3. Minimize number of charges 4. (-) on electronegative atoms 5. (+) on electropositive atoms RADICALS One unpaired electron Extremely reactive For moving one electron For moving two electrons ACIDS AND BASES Bronstead-Lowery HA + H2O A⁻ + H3O⁺ Acid: anything that donates a proton Base: anything that receives a proton HCl + H2O Cl⁻ + H3O⁺ An acid to conjugate base A base to its conjugate acid Strong acid = weak conjugate base Bad acid = weak conjugate base Big Ka: equilibrium on right Small Ka: equilibrium on Left +3 ¿ H O ¿ −¿¿ A ¿ ¿ Ka=¿ Big pKa: more acidic Small pKa: more basic Ka log¿ pKa=−¿ acidity increases HC≡CH H₂C=CH₂ H₃C –CH₃ Acidity increasing HC≡C⁻ H₂C=CH⁻ H₃C - CH₂⁻ Basicity increasing The LARGER pKa on conjugate acid The STRONGER the base Resonance stabilization increases with number of equivalent structures
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