Organic Chemistry 2 Week 5
Professor’s Email: email@example.com
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.
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.
If you want to learn more check out What is a statistic and what is a parameter?
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.
L11- Graphical Huckel Method We also discuss several other topics like What is the negative portrayal of different categories of
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.
L12 Cyclo Addition- Diels Alder
First identify the diene and the dieneophile. Deiene refers to a butadiene like structure. Don't forget about the age old question of How many planets would we need to sustain life?
If you want to learn more check out Why is directional solidification important?
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. Don't forget about the age old question of What is mead's theory?
Don't forget about the age old question of What is the difference between an enantiomer and a diastereomer?