242a_hw2_2007 - Chem 242a Problem Set II Name _ 1. We will...

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Chem 242a Problem Set II Name ______________ 1. We will discuss the relative stabilities of the different conformers of cis -1, 2- dimethylcyclohexane and trans -1, 2-dimethylcyclohexane in class. Based on our discussion, draw both chair conformers for each of the following compounds and circle the more stable of the two. Please indicate your reasoning for the choices based upon an evaluation of energetic differences of the two possible conformers. Indicate whether the substituents are axial or equatorial. Molecular models will greatly help in this effort. Also, a table for the steric strain due to 1,3- diaxial interactions of different substituents can be found on page 124 of your textbook. Please name the compounds above.
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Chem 242a Problem Set II Name ______________ 2. 1,3 dioxanes, as in compound A, can exist in chair conformations just like cyclohexanes. Very interestingly, compound A (5- tert -butyl-1,3-dioxane) shows no energetic preference for the two conformations, where the tert-butyl group is axial or
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242a_hw2_2007 - Chem 242a Problem Set II Name _ 1. We will...

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