1-Bromo-2-methylcyclopentane has four pairs of diastereomers. Draw the four pairs.

Draw a Newman projection of the synclinal (or gauche) conformation of 1-iodo-2-nitroethane (ICH2CH2NO2).

4. (a) Draw a skeletal (line-bond) structure for 3,4-dimethylhexane. (b) Draw a sawhorse representation of any staggered conformation of this molecule looking down the carbon-3 to carbon-4 bond. (c) Draw a Newman projection looking down the carbon-3 to carbon-4 bond of the same conformation that you drew as a sawhorse representation.

Draw the Newman Projection for the highest and lowest energy conformations of   1-iodo butane, as viewed down the bond between the second and third carbons.  Label each projection as high or low energy and describe each projection.

b) a) b) Identify the functional group for each organic compound below and give the IUPAC name the compound. 0 CH3CH₂CH₂CH₂C-O-CH₂CH3 CH3-C=CH2 CH₂ CH3 mature Functional group_ Name: Functional group_ Name:

Determine whether trans-1,2-dimethylcyclopentane contains a chiral center. How many different substituents do you count at atom #(2)?