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lect26 - utdirect.utexas.edu/diia/ecis...

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CH 310M/318M – TTh 8am – Lecture 26 – Th 4/26/2007 Reading : Sections 10.6 through 10.8 Textbook Problems : 10.14, 10.15 (except k, l, m), 10.16 (except h), 10.17 through 10.23, 10.25 through 10.28 Graded Homework : HW#18 deadline = TODAY @ 3:00 p.m. HW#19 has been posted. Deadline = 3:00 p.m. on Mon 4/30 HW#20 has been posted. Deadline = 3:00 p.m. on Thu 5/3 Today : β -Elimination reactions (continued…) Chapter 9 summary Introduction to alcohols (begin Ch. 10) Be sure to check that your exam and homework grades are correct in the Blackboard gradebook! Deadline to submit regrade requests for Midterm #3 is Tuesday, 5/1 @ 11:00 a.m. See the “Exam Pickup & Regrade Policies” handout for detailed instructions. Also see this handout to find out how to pick up your exam if you did not get it on Monday… Please complete an online course survey!!! https:// https://utdirect.utexas.edu/diia/ecis utdirect.utexas.edu/diia/ecis
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Unformatted text preview: utdirect.utexas.edu/diia/ecis utdirect.utexas.edu/diia/ecis/ (The system will be open until the end of the day on Friday, 5/4) Last Time : • Factors that influence rates of S N 1 and S N 2 reactions (continued…) β-Elimination reactions Chapter 9 Summary X H H H methyl substrate S N 2 • good Nu – • good L.G • polar aprotic solvent E2 NO!!! S N 1/E1 NO!!! X R H H 1°substrate • good Nu – /weak base • good L.G • polar aprotic solvent • strong, bulky base ( t BuO – ) • good L.G NO!!! X R R H 2°substrate • good Nu – /weak base • good L.G • polar aprotic solvent • strong, bulky base ( t BuO – ) • good L.G • poor Nu – /weak base • good L.G • protic solvent X R R R 3°substrate NO!!! • strong base • good L.G • poor Nu – /weak base • good L.G • protic solvent (End Chapter 9 Material)...
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