Lecture8-Alkenes&AlkynesI

Lecture8-Alkenes&AlkynesI - Announcements v ExamII...

Info iconThis preview shows pages 1–22. Sign up to view the full content.

View Full Document Right Arrow Icon
Announcements v Exam II grades posted. v We are halfway through the course. Now is not the time to relax. v Exam III will be given next Wednesday, June 29. It will cover chapters 7 & 8. v Summer 2010 Exam III – exclude problems 4, 7, 11. v WS7 Pt 1 – Everyone received +2, unless you did not 11
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Question 5 (Question 2 Form 3) 22 25 % of the class answered correctly 20 % 14 % 27 % 14 % H Br Me Pr Me Et Me Pr Br Me Et H
Background image of page 2
Question 3 (Question 9 Form 3) 33 26 % of the class answered correctly 19 % 52 % CH 3 H 3 C HO H H H H H H OH CH 3 H 3 C H OH H H H HO H H R R S S meso
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Question 9 (Question 6 Form 3) 44 45 % of the class answered correctly 23 % 20 %
Background image of page 4
Question 2 (Question 8 Form 3) 55 46 % of the class answered correctly 25 % CH 3 NH 3 HC CH CH 3 COH O 4.75 10.6 25 increasing conjugate base strength
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Question 15 66 Average = 4.2 out of 10 points H 2 Pd-C A H 2 Pd-C B
Background image of page 6
77
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Question 16 88 Average = 4.7 out of 10 points
Background image of page 8
Question 17 99 Average = 6.4 out of 10 points
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1010 C C H Br OH C C C O H C O PCC C O H C Br H-Br C Br C Li C 1 1. 2. H 3 O + C 2 O C 1 C 2 OH C C Pd/C H H C C H H C C Pd/C H H C C H H H H C C LDA H C C C C C Br C C C Lecture 7 – Slide 41 b) Br LDA HC C Br HC CH LDA HBr HO 1. C=O 2. H 3 O + Li
Background image of page 10
Grade Distribution 1111 Average = 56.5 Median = 57 High Score = 98 0 2 4 6 8 10 12 Grade Number of Students Summer 2010 E2 Avg = 48.6
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Cha pter 7 Alkenes & Alkynes I 1212
Background image of page 12
Alkenes. Hybridization Review C C H H H H C C H H H H C C H H H H 121.1° sp sp2 sp3 atomic orbitals hybrid orbitals 1313 Alkenes are also known as olefins .
Background image of page 13

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
C C H H H H C C H H H H C C H H H H 121.1° sp sp2 sp3 atomic orbitals hybrid orbitals -bond σ Alkenes. Hybridization Review 1414
Background image of page 14
-bond σ C C H H H H C C H H H H C C H H H H 121.1° sp sp2 sp3 atomic orbitals hybrid orbitals π Alkenes. Hybridization Review 1515
Background image of page 15

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
ener gy rotation 12.6 kJ (3 kcal)/mol What is the energy barrier of rotation around a double bond? 1616 Let’s first review the barrier of rotation around a single bond.
Background image of page 16
Compared to alkanes, why is the rotational barrier for alkenes so high? 272 kJ/mol 65 kcal/mol rotation ˛ energy 12.6 kJ (3 kcal)/mol C C H H H H C C H H H H H H 1717
Background image of page 17

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
C H H C C H H H H Why is the rotational barrier for alkenes so high? C C H H H H H H C H H C H H H H C H H C H H 272 kJ/mol 65 kcal/mol rotation energy 1818
Background image of page 18
bond rotation Double bonds can produce stereoisomers 1919 diastereomers conformers
Background image of page 19

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Review: How do we name alkenes? H H CH 3 CH 3 H H CH 3 C l cis-2-butene cis-1-chloropropene H H CH 3 CH 2 CH 3 trans-2-pentene H C l CH 3 CH 2 CH 3 trans-3-chloro-2-pentene?? cis-3-chloro-2-pentene?? 2020 A. trans-3-chloro-2-pentene B. cis-3-chloro-2-pentene C. Neither. The cis-trans nomenclature can ONLY be used when both carbons of the double bond contain at least one exact substituent.
Background image of page 20
Is there a naming system for all alkenes? The E, Z system. E (Entgegen – opposite) Z (Zusammen – together) assigning priorities is the same procedure as in the R, S system.
Background image of page 21

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 22
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/21/2011 for the course CHEM 213CCF taught by Professor Staff during the Spring '08 term at Penn State.

Page1 / 82

Lecture8-Alkenes&AlkynesI - Announcements v ExamII...

This preview shows document pages 1 - 22. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online