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- Fill in the blanks: cis-1,3-Dimethylcyclohexane has two different chair conformations: one withboth methyl groups in __________ positions and one with both methyl groups in ____________ positions.Draw a Newman projection showing the lowest P.E. conformation of the following moleculesighting down the C2C3 bond (as indicated below). Show methyl and ethyl groups as Me and Et.Consider 1-bromo-2-methylpropane and draw the following. (a) The staggered conformation(s) of lowest energy (b) The staggered conformation(s) of highest energy
- Consider the molecule 1-bromo-2-methylbutane. C3 and C4 should be drawn as Et as in theexample. This group is called an ethyl group and can be considered a sphere about twice the sizeof a methyl group. Draw the following Newman projections sighting down the C1C2 bond... a. The lowest potential energy conformation. b. The highest potential energy staggered conformation.Following is a chair conformation of cyclohexane with the carbon atoms numbered 1 through 6. (a) Draw hydrogen atoms that are above the plane of the ring on carbons 1 and 2 and below the plane of the ring on carbon 4. (b) Which of these hydrogens are equatorial? Which are axial? (c) Draw the alternative chair conformation. Which hydrogens are equatorial? Which are axial? Which are above the plane of the ring? Which are below it?Following is a planar hexagon representation for one isomer of 1,2,4-trimethylcyclohexane. Draw the alternative chair conformations of this compound and state which of the two is more stable.
- myo-Inositol, one of the isomers of 1,2,3,4,5,6-hexahydroxycyclohexane, acts as a growth factor in both animals and microorganisms. Draw the most stable chair conformation of myo-inositol.3) Draw a cyclohexane chair with 3 substituents in the most stable conformation. Explain why the conformation you've chosen is the most stable.H C-Ć- C -CI Following is the structural formula of 1,2– dichloroethane. H H a) Draw Newman projections for all staggered and eclipsed conformations formed by rotation from 0° to 360° about the carbon- carbon single bond. b) Which staggered conformation(s) has the lowest energy; which has the highest energy? c) Which eclipsed conformation(s) has the lowest energy which has the highest energy?
- 3)) Draw the most stable chair conformation of a 1,2,4-trimethylcyclohexane (Show all the hydrogens and indicate if the bond is axial or equatorial at the substitution).Draw a chair conformation of this molecule with (a) all CH3 groups in axial positions and (b) all CH3 groups in equatorial positions.a) Draw the two chair conformations for the compound below, indicating which is more stable. OH CHO b) This molecule is a compound with an intense flowery odor used in perfumes, but it isomerizes rapidly in base to its odorless diastereoisomer. Draw the chair conformation of this diastereoisomer and explain why the isomerization occurs readily.