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Stereochemistry
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.
- Intro
- Stereochemistry
- Stereoisomer Examples
- Stereoisomer Examples
- Tetrahedral Carbon: Superimposable (Identical)
- Tetrahedral Carbon: Non-Superimposable (Stereoisomers)
- Chirality
- Chirality
- Nomenclature
- Nomenclature
- Drawing Stereoisomers
- Drawing (S)-2-bromopentane
- Drawing the Enantiomer of (S)-2-bromopentane: Method 1
- Drawing the Enantiomer of (S)-2-bromopentane: Method 2
- Fischer Projections
- Definition of Fischer Projections
- Drawing Fischer Projection
- Use of Fisher Projection: Assigning Configuration
- Molecules with Two Chiral Carbons
- Drawing Stereoisomers, cont.
- Drawing Stereoisomers
- Molecules with Two Chiral Centers
- Optical Activity
- Physical Properties of Stereoisomers
- Physical Properties of Stereoisomers
- Racemic Mixtures
- Unequal Mixtures of Enantiomers
- Unequal Mixture of Enantiomers


































1 answer
Last reply by: David Fan
Thu Mar 14, 2013 1:49 PM
Post by ochemstarkey on February 25, 2011
Occurred to me while pushing into fullscreen mode, I cannot see the teacher in the corner of the screen. Any examples not shown on the writing pad are not seen while in full screen mode. Might be nice to be able to see the professor still while in full screen mode.
1 answer
Thu Oct 20, 2011 11:15 PM
Post by Ling Huang on October 10, 2011
This lecture was very helpful. I have some questions that I would like to clarify. I thought that enantiomers is chiral and is non-superimposable but for the example of the (S)-2-bromopentane, the mirror image of the (s)-2-bromopentane is superimposable. If I reverse the structure and put it on top of each other it is the same structure. Also, for nomenclature, does it have to be all different for the for bonds that is attached to the center C? Thank You for your help.
1 answer
Sun Nov 20, 2011 9:22 AM
Post by christopher coppins on November 13, 2011
hi Dr.Starkey im taking organic 1 an we are now on test #3 which is covering the topics of stereochemistry, alkyl halides, and reactions of alkyl halides.....i see the stereochemistry lecture but i just wanted to make sure for the alkyl lectures which lecture topic will that fall under, will it be the SN1 & SN2 lectures? an by the way thank you so much your the reason why im passing organic 1....
1 answer
Wed Dec 28, 2011 11:34 PM
Post by Natnael Assefa on December 15, 2011
video not working...firefox IE or chrome. gets to 99% then goes back to zero and starts loading again. no matter how many times i close and reopen browser
1 answer
Tue Mar 6, 2012 11:09 AM
Post by Michelle Gavin on March 2, 2012
you need to change the program so that you can move forward and backward within a session so you can navigate directly to the section that is of interest.
1 answer
Sun Apr 29, 2012 9:40 AM
Post by michelle daane on April 28, 2012
Dr. Starkey,
I'm confused... How is it that when evaluating a molecule for r/s that you can changed sides of the molecule top/bottom....? If I look at the structure and put 1 up, both br and cl are wedges so would be on the same side...., say the right...
When you have more than one arm on the fischer, do all of the arms come towards you or is it every other one ex; back and forth?
thanks
0 answers
Post by ammar aljazairi on May 10, 2012
?
2 answers
Last reply by: Eduardo Castaneda
Mon Jun 18, 2012 7:52 PM
Post by Eduardo Castaneda on June 15, 2012
Dr. Starkey
On example 4 for Nomenclature the Carbon that had 2 carbons, H, and Br attached to it. did you have to look at the CH3's that were next to the CH2's to determine that they were Identical?
For example, I saw that the Carbon had 4 groups attached to it. Out of these four groups 2 of them were the same the "CH2." I stopped there and determined that it was an achiral carbon. You however went forward and compared the groups next to them. Why did you compare the groups next to the CH2 which were the CH3's. Do you have to go further out?
Because lets say that the group on one of the CH2's had a "Cl" attached and on the other side the CH2 had a "N" attached to it. Would that then make it a chiral center?
Im just confused as to why you went further out and compared the groups that were next to the CH2. This then brings up the questions that I asked.
1 answer
Fri Jul 20, 2012 11:51 PM
Post by Susan Reid on July 20, 2012
can you forward on the lecture?
0 answers
Post by Alena Schwartsman on October 25, 2012
Lecture has to download completely to be able to skip around (there is loading bar at the bottom of a lecture video). After launching any lecture just wait for a few minutes and than skip around. Hope this helps.
1 answer
Sun Dec 16, 2012 4:39 PM
Post by Susan McConnell on December 16, 2012
Hi Dr Starkey,
are there any lectures on Ramachandran plots and phi and psi angles? thanks
1 answer
Sun Jan 6, 2013 1:20 PM
Post by wow love on January 6 at 09:18:21 AM
Hi Dr. Starkey
In the 60 min when you were talking about fischer projection, I am kind of confuse about how to figure when the atom would be on your left or right??? I see the little stick figure you make however, how do one differentiate if a dash or wedge would be the atom on your left or right???
1 answer
Sun Jan 6, 2013 1:21 PM
Post by wow love on January 6 at 09:58:23 AM
Hi,
you said same physical property, what about chemical property?
1 answer
Sat Jan 26, 2013 9:45 PM
Post by marsha prytz on January 26 at 11:39:51 AM
at 29:39 you are numbering the 4 groups attached to the chiral center. I was following until you got to the tie. You stated the end carbon with H,H,H was ranked #3 and the carbon #2 was ranked #2 group of the carbon because it had C,H,H. What I'm confused is why you didn't include the C with the 3 H's? Isn't there a carbon there?
1 answer
Thu Mar 7, 2013 11:11 AM
Post by Kristine Penalosa on March 6 at 11:00:06 PM
Dr. Starkey,
Is there any way to put the slides in powerpoint format, so we can print the slides all at once?
Thanks for all the lectures!
1 answer
Fri Mar 29, 2013 1:51 AM
Post by ahmed alzeory on March 28 at 08:05:37 PM
hello dr
for the nomenclature example the last one with hydrogen and bromide, how is it achiral even though the hydrogen and the bromide do not go within the line of symmetry?
1 answer
Tue Apr 23, 2013 3:54 PM
Post by Alicia DaSilva on April 23 at 01:18:42 PM
Here is one of my homework questions: a chiral carbon has the following molecules attached to it:
1. CH(CH3)2
2. CH2CH2Br
3. CH2CH
4.H
Question, why does the CH(CH3)2 has a higher priority than CH2CH2Br?