5. (8 pts) Draw both chair conformers for the following compounds. Circle the one that is the most stable: a) OH CH3 b) CH3 HO HO CH3 ه I HO CH3 Ф H

Draw the most stable chair conformation of the following compound: O OH

1.3 Draw the most stable (briefly explain) chair conformation for compound A. Draw both conformations first and then identify the least stable conformer. но. 5 0 3 1 HO NH2 A 3

Draw a Newman projection for two more staggered conformations of this molecule. Which of your conformations is most stable? Assume that -OH and -CH3 are comparable in size.

(5) a. Draw the LOWEST energy conformer of the following compound in a Newman Projection. The projection should be as if you are looking down the 2-1 C-C bond, with carbon 2 in front.

1E.) Which of the following two conformers is lower in energy? Both conformers are of equal enery O A Conformer A is lower in energy. B Conformer B is lower in energy. It cannot be determined

3. Which of the following statements best explains the reason for the relative stabilities of the two conformers shown below? CH3 H3C CH3 H₂ CH3 H H H H H3C CH3 A. B. A) A has more torsional strain; B has more steric strain. B) A has more steric strain; B has more torsional strain. C) A and B have the same torsional strain. D) A and B have the same steric strain. E) A and B have similar steric strain; B has more torsional strain.

Please help

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(5) Draw the most stable chair conformation of the cyclohexane shown below. CH3 CI H3C Br OH CH3