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UTEP / Chemistry / CHEM 2325 / How the two molecules fit together?

How the two molecules fit together?

How the two molecules fit together?

Description

School: University of Texas at El Paso
Department: Chemistry
Course: Organic Chemistry - 12551
Professor: James salvador
Term: Fall 2015
Tags: Organic Chemistry, Ochem, UTEP, and University of Texas at El Paso
Cost: 25
Name: Week 5- L10,L11,L12
Description: This covers L10 (how to do it), L11 with all the answers because no one has time for those long matrices! And L12 I give 4 examples and tell you the best way of doing them.
Uploaded: 02/20/2016
10 Pages 68 Views 3 Unlocks
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Organic Chemistry 2 Week 5


How the two molecules fit together?



Important Information:

Professor’s Email: jsal@utep.edu 

Class Website: organic.utep.edu/courses/2325

Class Code (E-book): utep2325spring2016

Includes examples of the Homework! Posted the week before the homework’s are due to help everyone  get 100’s!

L10 Conjugated and Isolated Alkadienes 

Conjugated compounds are adjacent compounds meaning they overlap or are paralle. If the compound is nonequalivalent remember E and Z.  

If it is under 200 that means NOT conjugated (isolated)

Over 200 means conjugated.

Example1: buta-1,3-diene This was just a naming excerise. We know there are four carbon so buta, and  the dienes are at the 1 and 3 position. There are no E or Z because the molecule is equivalent.


What is a double bond in chemistry?



We also discuss several other topics like What is a statistic and what is a parameter?

Example 2 is a naming of a nonequivalent molecule. The longest chain is five so penta, and there is a  double bond at 1 and 3, because of the methyl this becomes a Z configuration.


Why conjugated dienes are more stable than isolated dienes?



We also discuss several other topics like How will having viewed the video affect your thinking about or the way you watch tv in the future?

Example 3 is the absorption rules so it has no absorption over 200, but before you try to figure out what  this means draw out 3-methylpentane. We know that it will be isolated because it is not over 200, so the  1 and 4 position are the most likely since we have no other information to go by.

Example 4 is the same as example 3, just no methyl.  If you want to learn more check out Why is directional solidification important?

L11- Graphical Huckel Method If you want to learn more check out How much should you be compensated for the loss of a system?

I could take the time to explain matrixes but just watch Dr.Salvador’s video. I am not that good at  explaining this so instead I have all 10 answers here. on tests.

If you want to learn more check out What is mead's theory?
If you want to learn more check out How do i find the axis of symmetry of a parabola?

L12 Cyclo Addition- Diels Alder 

First identify the diene and the dieneophile. Deiene refers to a butadiene like structure.

Then you want to twist along the diene so the areas around the double bond overlap with the  dieneophile.  

Dr.Salvador mentioned the star method this means you look at the 2 molecules and look for electron  deficiency and electron density. The star is that butadiene position. Cis molecules turn trans.

Example 1: First DRAW OUT THE two structures so you can tell where to twist them. Once you have  them lined up start “walking” the pi electrons around the circle. I have included three more images so  you can try to see how the two molecules fit together.

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