conformational analysis Sp10

conformational analysis Sp10 - CH 3 H CH 3 CH 3 H H 3 C c....

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Name:_______________________________________ Conformational Analysis Lab Spring 2010 (Keep one copy; turn in one copy per group) 1. Draw the structure of 1-bromopropane. Draw Newman projections for the two gauche conformers, the anti conformer, and the highest energy eclipsed conformer of 1-bromopropane, sighting down the C-1–C-2 bond. Label each conformer you draw. 2. Convert the conformers you drew to sawhorse projections. Example:
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Conformational Analysis, page 2 of 3 3. The Newman projections shown below are different conformations of 2,3- dimethylbutane. Identify which one is highest in energy (least stable) and which one is lowest in energy (most stable). a. H H 3 C CH 3 CH 3 H H 3 C b.
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Unformatted text preview: CH 3 H CH 3 CH 3 H H 3 C c. H H 3 C CH 3 CH 3 H H 3 C d. CH 3 H CH 3 CH 3 CH 3 H 4. Draw Newman projections representing the two gauche conformers and the anti conformer of 2-methylhexane sighting down the C-3C-4 bond. Label each conformer you draw. Is the steric energy of these gauche conformers greater than, equal to, or lower than that of the gauche conformers of butane? Provide a justification for your answer. Conformational Analysis, page 3 of 3 5. Draw both chair conformations for each of the following molecules and circle the conformer that is lower in energy. If both conformers are equal, state that. Also, name each molecule. a. F b. c. OH d. Cl Cl H 3 C...
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This note was uploaded on 05/31/2011 for the course CHEM 3341 taught by Professor Staff during the Spring '08 term at Georgia Southern University .

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conformational analysis Sp10 - CH 3 H CH 3 CH 3 H H 3 C c....

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