CH221_Practice_Exam_1

CH221_Practice_Exam_1 - Dr. Sandberg, Spr 00 CH221 Exam 1:...

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Dr. Sandberg, Spr 00 CH221 Exam 1: Name: (last)________________________________, (first)_________________________ 1. a) In the box draw the Newman projection of the most stable conformation of one of the isomers of 2,3-dichlorobutane . b) What is the spatial relationship between the C-2 bonded hydrogen and the C-3 bonded hydrogen ? c) What is the classification of the chlorines (methyl, 1 o , 2 o , 3 o )? d) Does the conformation you drew above have a dipole moment greater than 0? 2. a) In the box (using the chair conformation) draw the most stable conformation of trans -1- tert -butyl-3-methylcyclohexane . b) What position does the methyl group occupy in the most stable conformation (axial or equatorial)? c) What is the spatial relationship between the quaternary carbon and C-3 in the most stable conformation? 3. a) Which is more stable: trans -1,2-dimethylcyclohexane or cis -1,2-dimethylcyclohexane of the major conformation in each one’s equilibrium mixture? (Write either cis or trans .) b)
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This note was uploaded on 03/30/2009 for the course CH ORGANIC CH taught by Professor Kaysandberg during the Spring '09 term at N.C. State.

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CH221_Practice_Exam_1 - Dr. Sandberg, Spr 00 CH221 Exam 1:...

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