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Worksheet 4 key - Chemistry 118A Winter 2008 TA Dani Solano...

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Chemistry 118A Winter 2008 TA: Dani Solano Week 4: Molecular Models Part A: Use your model kit to draw out all eclipsed & staggered forms of 2- methylbutane as rotated about the C2/C3 bond. Order your structures by torsional angle. Order your structures from lowest to highest relative energy. CH 3 H H CH 3 CH 3 H H H CH 3 CH 3 CH 3 H H 3 C H H CH 3 CH 3 H H H 3 C H CH 3 CH 3 H H H 3 C H CH 3 CH 3 H H H CH 3 CH 3 CH 3 H 0 o 60 o 120 o 180 o 240 o 300 o CH 3 H H CH 3 CH 3 H H H CH 3 CH 3 CH 3 H H 3 C H H CH 3 CH 3 H H H 3 C H CH 3 CH 3 H H H 3 C H CH 3 CH 3 H H H CH 3 CH 3 CH 3 H = = < < < Highest relative energy Lowest relative energy
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