Rank conformations bcd from most stable to least stable (most stable first) DUH ΤΗ HH Conformation...
Question 1 (1.5 pts] The total strain energy of conformation A is 10.5 kcal/mole (R denotes the same unspecified alkyl group). What strain energy (in kcal/mole) is associated with a single R:R 1,3-diaxial interaction? Please enter just the numerical value rounded to one decimal place. Please do not include units H HT HUT HHHH HH Conformation A Question 2 (1.5 pts] Rank conformations B, C and D from most stable to least stable (most stable first). IC H (CH2CH2CH3)3 CH(CH3)2...
1. Rank the following cyclic alkanes from most stable (1) to least stable (4). (2 pts) 2. From the sawhorse projections below, circle the highest energy conformation for ethane. (2 pts) HH Hн HHH HH Hy Yo ΗΜΗ 3. Circle the chair conformation below that represents the lowest energy conformation for cis-1,3- dimethylcyclohexane? (2 pts) SSSSSS 4. In the figure below, identify the Newman projections by the letter (A, B, C, or D) which best describes each conformation for 1-chloropropane....
Rank the following conformation in order of increasing energy. Put the lowest first. CH2CH3 CHCH HH-CH2CH, HOCH CH H.CH C HC CH CHE CH₂CH3 HCH,C1 CH2CH CH3 CH2CHE CH,CH CA<C<D<B O C<A<B<D CC<A<D<B A<C<B<D
For each pair of species, predict which is the stronger base? 5. Он or 2. or HH 1. NH NH (b) 6. Rank the following from most stable to least stable. 4. 1. 2. 3. Н-с H H Н.с H -H H CH3 CH,сн, CH,сH CH,CH H 7. Which cation would be the most stable? А. В. C. D. What is the order of increasing contribution to the resonance hybrid? 8. CF3 Lnkentn CF3 CF3 Ш II I
9. Rank the conformers of butane in order of decreasing stability, putting the most stable first. Н. CH3 H ac CH3 H CH3 CH3 HCH TH ΣΕΗ CH, HYH H HHHH н CH, I A) B) IV>I>II> III IV > I > III > II C) D) II > III >I> IV I>IV > II > III 10. Which of the following chair conformations represents trans-1,3-dimethylcyclohexane? A) I B) II C III D IV 11. Which of the following chair...
10) a) Draw the most stable and least stable chair conformations of rms- l ethylcyclohexane. b) Caleulate the energy of both structures. 11) Draw the most stable chair conformation of cis-1-ethyl-3-methyleyclohexane.
13. Below are the planar hexagon representations for two substituted cyclohexanes. Using the chair conformations provided, draw the chair conformation for these compounds a and b and indicate the most stable conformation (if applicable) for each of these two compounds. 3 points) CH C(CH3)3 CH3 CH3 CH3 н H H н А B Compound A "flip" Compound B "flip"
11. Build the chair and boat conformations and identify the most stable conformation. Identify the 1,3-diaxial interactions. 12. Draw the most stable conformation of (a) ethylcyclohexane (b) 3-isopropyl-1,1-dimethylcyclohexane (c) cis-1-tert-butyl-4-isopropylcyclohexane 13. Draw all possible conformations of 1,4-dimethylcyclohexane and identify the most stable conformation 14. (a) Draw both chair conformations of cis-1,2-dimethylcyclohexane, and determine which conformer is more stable. (b) Repeat for the trans isomer. (c) Predict which isomer (cis or trans) is more stable. 15. (a) Draw both chair conformations...
Question 9 4 pts Which of the following chair conformations represents the most stable chair conformation of (15,3S)-1-isopropyl-3-methylcyclohexane? n o CY
Why’s is choice IV the most stable in question 4 and for question 5 where do I place all components of the conformer 4. Which would be the most stable conformation of trans-1-me ? Why? CH CH3 CH Bu Bu Bu IV H 5. Using the chair conformations drawn below, give the most stable and the least stable conformations of cls- and trans- 1-isobutyl-2-ethylcyclohexane. Show to which side the equilibrium lies and briefly explain why