Chapter 4, Problem 35P

Consider 1,2-dimethylcyclohexane.a. Draw structures for the cis and trans isomers using a hexagon for the six-membered ring.b. Draw the two possible chair conformations for the cis isomer. Which conformation, if either, is more stable?c. Draw the two possible chair conformations for the trans isomer. Which conformation, if either, is more stable?d. Which isomer, cis or trans, is more stable and why?

For each compound drawn below: a. Draw representations for the cis and trans isomers using a hexagon for the six-membered ring, and wedges and dashes for substituents. b. Draw the two possible chair conformations for the cis isomer. Which conformation, if either, is more stable? c. Draw the two possible chair conformations for the trans isomer. Which conformation, if either, is more stable? d. Which isomer, cis or trans, is more stable and why? [1] [2] [3]

a. Draw the structure of this molecule as a hexagon with dash(es) and/or wedge(s). ha -OH b. Draw the other chair conformation. c. Draw the enantiomer of the molecule in its most stable conformation. он H d. Ignoring differences in conformation, how is this molecule related to the one above? Are they the Same molecule, Enantiomers, or Diastereomers? OH H₂ HH₂ POM (CH₂)2

Draw the more stable chair conformation for each compound. a. trans-1-isopropyl-3-methylcyclohexane b.cis-1-sec-butyl-4-ethylcyclohexane c. cis-1-ethyl-2-isobutylcyclohexane d. trans-1,2-dibutylcyclohexane

For each compound drawn below: a. Draw representations for the cis and trans isomers using a hexagon for the six-membered ring, and wedges and dashed wedges for substituents. b.Draw the two possible chair conformations for the cis isomer. Which conformation, if either, is more stable? c. Draw the two possible chair conformations for the trans isomer. Which conformation, if either, is more stable? d.Which isomer, cis or trans, is more stable and why?

g. Draw two chair conformations of the following molecule and indicate which one is more stable. h. Draw the Newman projection of the following molecules. Classify each conformation as staggered or eclipsed around the indicated bond, and rank the conformations in order of increasing stability. CH2CH2CH3 CH3 (CH3)2CH, CH2CH2CH3 (CH3)2CH .C- CH3 CH3 CH3 A

a. Draw the two chair conformers for each of the stereoisomers of trans-1-tert-butyl-3-methylcyclohexane. b. For each pair, indicate which conformer is more stable.

a.Draw the most stable conformation of trans-1,2-dimethylcyclohexane. b. Draw the most stable conformation of cis-1,2-dimethylcyclohexane.

a. b. For the following two pairs of molecules, (1) Draw out the chair conformation for each molecule, flip the ring if it is possible. (2) Compare both molecules to circle out which one is more stable. (3) Identify their relationship as: constitutional isomer, conformational isomer, stereoisomer or identical. (4) Find all the chiral center on each molecule and label them. Br and ZX- and VS. H H H Br H H ∞