Chair Conformation Examples
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Chair conformation examples. Place the groups on the molecule written using wedge dash notation onto the correct chair projection skeleton. In an example of drawing chair conformation with constituents besides all hydrogens like say an ethyl group and an isopropyl group how do you determine the most stable confirmation. After doing so i am a little uncertain which of the conformations is the most stable.
By joining chemistry steps you will gain instant access to the answers and solutions for all the practice problems including over 20 hours of problem solving videos multiple choice quizzes and t he powerful set of organic chemistry 1 and 2 summary study guides. For this two different template chair projection skeletons can be used. The chair conformation has alternating axial up axial down so once you have that single axial substituent move on to.
If you are already registered upgrade your subscription to cs. The templates that can be used for changing molecules written using wedge dash notation into chair projections are shown below. More examples back next.
I am asked to draw the most stable chair conformation of compound 1. For example the difference in energy between the two chair conformations of tert butyl cyclohexane 24 kj mol is much larger than for methylcyclohexane 7 kj mol because a tert butyl group is larger than a methyl group and results in more energetically unfavorable 1 3 diaxial interactions. Alternate your axial substituents up and down all the way around your cyclohexane.
For instruction on how to perform a ring flip click here therefore these molecules are enantiomers. The mirror image relationship can be seen by comparing the ring flip conformation of the chair projection on the right to the current conformation of the chair projection on the left. Every carbon on the chair conformation has 1 substituent axial and the other equatorial.
Click here to register. Other conformations for cyclohexane do exist and they include the boat half chair and twist boat conformations but the most important conformation is the chair because this conformation is typically the most stable conformation. This comparison is shown below.
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