4. Draw the most stable and most unstable Newman Projection for the following molecules using the rotation around the C3-C4 bond (use the IUPAC rules to number the chain) 5. Draw the two chair conformations for each of the following cyclohexane derivatives and then choose the conformation that is the most stable. Br BA 3 3 3 $ 2879 So ya 6. For the following compounds, identify the chiral carbons with an asterisk (*) and for those that are not chiral, identify the plane of symmetry CH3 HANO CH3 CICI CH C-C-OH HO+CEN HOECEN CHHO-CEN NIC-OH HY 15+CEN H+SCH, D +CH, HNO C-C- HA HA CH eq Go 7. Draw the most stable chair conformation for the following molecules from their IUPAC name a. (15, 3R)- 3-Bromo-1-ethyl-1-methylcyclohexane b. (15, 25, 45)-2-chloro-1-ethyl-4-methylcyclohexane C. (1R, 25, 45)-2-ethyl-1-isobutyl-4-methylcyclohexane d. (1R, 25, 4R)-2-ethoxy-1,4-dimethylcyclohexane