Which of the following molecules show cis-trans isomerism? (Select all that apply.) Draw the cis-isomer of one of these. • Use the wedge/hash bond tools to indicate stereochemistry where it exists.

Do not give handwriting solution.

Recitation Discussion Problem: USE MOLECULAR MODELS and bring them to recitation. Molecule: 2-methylpentane 1. Draw in bond-line notation. Number all carbons in the pentane backbone. Identify carbons #2 -3. Circle these on your bond-line structure. 2. Draw the Newman projections for all 60° rotations looking down carbons #2-3- starting with the eclipsed conformation. Make sure to keep the front carbon static only rotate the back carbon. Use models. You should draw seven Newman projections in total, 4 eclipsed, 3 staggered. The first and last Newman projections (0° and 360°) are identical. See Karty Chapter 4 for examples. 3. Identify the major interactions occurring in each conformer (which bonds are eclipsed; which have gauche interactions, etc.) and RANK associated energy of eclipsed in terms of size of group. Greater energies are involved for larger eclipsed groups. See Karty Chapter 4 energy diagram examples. 4. Plot these conformations on an Energy Diagram (similar to Karty Figure…

is this z or E？？ If it is E. please in details explain why cycloproyl is greater than OH group？？？