Question

Questions Module BCCL 150 W 1. Draw one cis and one trans-1-chloro-3-methylcyclohexane with the cyclohexane in the of the paper and bold and dashed groups (there are actually 2 of each). Look at ang w the four possible chair conformers of these two compounds and their calculated energies in 3D. Table 3. Conformational Isomers of 1-chloro-3-methylcyclohexane Compound Cis (chair) Cis (chair) flipped Draw w/bold/dashed Draw ay in plane of page Draw axin plane of page GI CHE Ik called the chair) flippede Energy Compound Draw w/bold/dashed AH-26.2 kcallwall AH -24.7 kcal Trans (chair) Trans (chair) flipped Draw ax/eqin plane of pape Draw axle in plane of page N Energy AH-23.9kcellul AH-22.4 Keallna Calculations: 2 H-Methyl diaxial- What energy is needed for a ring flip (e.g. absolute value of the difference in two cis or two trans isomers)? AAH (cis) = |(-trans) = 2. Circle the more stable conformational isomer of the trans isomer. 3. What is the AH a single 1,3-diaxial CH3/Cl interaction? = Hint: don't forget to subtract the other 1,3-diaxial interactions. Show work.

I really meed help with #2 & #3

Answer 1

cis ( chairs cis (Chao) flipped CHE 21.5 poll CH9 HTV TC TH(a.a VA PERY (,) er etų - both cif CHg are eq. H Ce,e) uatorial. O kJ/mo) ಅ೦ಶೇ 9tml 1- chlodo-3-methyl cyclohexane 1,3- diaxial: CI-H = lokJ/mol 1.3 - diaxial : CH-H = 3.8 kJ/mol 1,3-dioxidul: CHCl = 16.2 kglmol сен сна mol H | Trap (chai3) H 2 CH-H = 2 x 3.8 = 7.6 KJ 2 H.Cl = 2X1.0 - 2.0 KJ)mo) [more stable] cis ce,e) is mode stable than cis (a, a) by 21.5 kJ/mol . AH = H.61 + CH'H + CH.cl 21:5 = 1.0 + 3.8 + CH3.61 CH.61 = 16.7 KJ /mol