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Microsoft PowerPoint - 13B - What pairs of letters...

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1. ad, km 2. ad, ef, km 3. af, km 4. af, mn 5. ak, mn 6. fa, km 7. fa, mk 8. ab, ce, km 9. ag, hk, mn 10. ae, km What pairs of letters represent the most likely mechanism? 4% 3% 78% 4% 0% 2% 1% 2% 4% 3% 0. 4pts 1pt a c h b d g f m e k n 2pts 2pts 2pts
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Summary of Critical Points from Last Class H C Br H H N C Transition State P.E. reaction progress Δ H E act Tells you if reaction is uphill or downhill (Today: pKa data help us estimate Δ H) Height of E act determines Rxn Rate (Part C: factors effecting E act ) S N 2 S ubstitution N ucleophilic 2 Bimolecular (two reactants in slow step)
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Summary of Critical Points from Last Class C Br H H H HC C Show electron changes using curved arrows
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Summary of Critical Points from Last Class Et C Br Me H N C S * R Inversion occurs during S N 2 Chiral atom will change from R barb2right S (or S barb2right R) (except when priority of LG is different from Nuc) For example: in this case both the LG and Nuc are highest priority (1).
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assume -16 -16 Preview of this Class C NR 3 H H H HO H HO NR 3 C H H H HO assume +9 +9 assume Δ H rxn = -7 NR 3 Making bond to —H
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