Portmess Homework Q&S 70

Portmess Homework Q&S 70 - 64 CONFORMATIONS OF ALKANES...

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A-11. Sketch an approximate potential energy diagram similar to those shown in the text (Fig- ures 3.4 and 3.7) for rotation about a carbon carbon bond in 2-methylpropane. Does the form of the potential energy curve more closely resemble that of ethane or that of butane? A-12. Draw the structure of the sulfur-containing heterocyclic compound that has a structure anal- ogous to that of tetrahydrofuran. PART B B-1. Which of the listed terms best describes the relationship between the methyl groups in the chair conformation of the substance shown? ( a ) Eclipsed ( c ) Anti ( b ) Trans ( d ) Gauche B-2. Rank the following substances in order of decreasing heat of combustion (largest B smallest). ( a )1 . 2 . 4 . 3( c )3 . 4 . 2 . 1 ( b )2 . 4 . 1 . d . 3 . 2 . 4 B-3. Which of the following statements best describes the most stable conformation of trans - 1, 3-dimethylcyclohexane?
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This note was uploaded on 09/20/2011 for the course CHM 2210 taught by Professor Reynolds during the Spring '01 term at University of Florida.

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