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Question #12 Answer:<br />
Due to the symmetry of the methyl group, rotation around the N-CH 3 bond does not alter the 3D<br />
relationship of the atoms (left figure). The same hold true when viewing along the N-CH 2 bond (right<br />
figure). Conformational isomers therefore do not exist along these bonds.<br />
Question #13 Answer:<br />
Both the far left and middle rotamers (trans and gauche rotamers) could be stabilized by an H-bond<br />
between the amine and hydroxyl groups.
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