Lecture-5-Conformational-Analysis.pdf - CHEM 8A Binder...

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CHEM 8A Binder Lecture 4 & 5 In-Class Problems Draw the structure of 4-Ethyl-2,2-dimethylhexane Name the following compound (How many degrees of unsaturation does this compound have?) NEWMAN PROJECTIONS explore rotation around C-C single bonds. Draw each conformation of (2 R , 3 R )-2-bromo-3-chlorobutane . Label the most and least stable. H 3 C CH 3 Br Cl H H H H 3 C Cl Br CH 3 H H H 3 C Cl Br CH 3 H staggered eclipsed rotate 30 o staggered rotate 30 o rotate 30 o eclipsed rotate 30 o staggered rotate 30 o eclipsed Draw each conformation of (2 R , 3 S )-2-bromo-3-chlorobutane . Label the most and least stable. H 3 C CH 3 Br H H Cl Br CH 3 H staggered eclipsed rotate 30 o staggered rotate 30 o rotate 30 o eclipsed rotate 30
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