1. (3 points) Write Newman projections for all three staggered conformations of 2-methylpentane, viewing down the C2-C3 bond (C2 in front). Label the three A, B, and C, and compare them in terms of their relative energy.

B is highest energy, A and C are equal in energy

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2. (4 points) Give complete IUPAC names for each of the following:

a)

3-bromo-3-ethyl-2,2,4,6-tetramethylheptane

b)

trans-1-methyl-3-(1-methylpropyl)cyclopentane

trans-1-sec-butyl-3-methylcyclopentane

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3. (3 points) Write structures for both chair conformations of trans-1,2-dimethylcyclohexane.
Indicate which would be more stable.