CHEM 341 Workshop Questions Week 4 IUPUI

CHEM 341 Workshop Questions Week 4 IUPUI - gauche and anti...

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Name___________________________________ C341 Workshop Section____________________ September 16/17, 2010 Workshop 4 Questions 1. Write the condensed and bond-line formulas for the isomeric five isomeric C 6 H 14 alkanes. Provide the IUPAC name of each isomer. Match each isomer to its boiling point and explain your rationale for assigning each boiling point to its isomer. Isomer Name Condensed Formula Bond-line Formula B.P. (°C) 68.7 63.3 60.3 58.0 49.7 2. Which atoms in the following reaction undergo changes in their oxidation state? Which substrates are oxidized? Which are reduced? NO 2 + 2Fe + 7H + + NH 3 + 2Fe 3+ + 2H 2 O 3. 1,2-Dibromoethane has zero dipole moment, while ethylene glycol, CH 2 OHCH 2 OH, has a measurable dipole moment. Draw a Newman projection for each compound and explain. 4.
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a. Make molecular models of n-butane in the
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Unformatted text preview: gauche and anti conformations, as well as the conformation in which the two methyls are eclipsed. Make careful sawhorse and Newman projection drawings of the three conformational isomers. b. State which conformational isomer, gauche or anti , would have 0.9 kcal/mol higher energy. Explain your reasoning. 5. Make a molecular model of methylcyclohexane, and carefully draw the two chair conformations. Measure the distance between the methyl carbon and the carbons at the 3- and 5- positions on the ring. On the basis of your measurements, which of the two cyclohexane conformations do you predict will predominate at equilibrium? Is the methyl group axial or equatorial in the more stable conformation? Explain your reasoning. CH 3 3 5...
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This note was uploaded on 03/07/2012 for the course CHEM 341 taught by Professor Oh during the Fall '10 term at IUPUI.

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CHEM 341 Workshop Questions Week 4 IUPUI - gauche and anti...

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