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- The eclipsed conformation of CH3CH2Cl is 15 kJ/mol less stable than the staggered conformation. How much is the H,Cl eclipsing interaction worth in destabilization?Identify the highest and lowest energy conformation. If multiple energy conformations are degenerate, choose only one. Et H. Et Et H. H. MeEt Lowest Energy Me Highest Energy Et H. Et H. Et H. H- H. MeEt Highest Energy Me Lowest Energy Et H. Me H. Me C H H H. Me MeEt Highest Energy Lowest Energy Et H. Me Me H. H H Ме MeEt Lowest Energy Highest Energy OA OB ODWhat chair structure corresponds to the highest energy conformation of trans-1,4-dichlorocyclohexane (shown on left)? CI CI CI CI CI CI CI .CI CI A C D CI B O O O O
- Order the conformations of butane from lowest energy to highest energy (1 being the lowest energy). CH₂ H. H A B C D H A CH₂ H H₂ H CH3 CH₂ B H 'H H₂C CH₂ H H 4 1 3 2 -H 'H H H CH₂ H D -CH₂ HWhich statement describes the conformations below? H₂CCI I H. H CI CH3 'Н H The staggered conformation on the left is more stable. O The staggered conformation on the right is more stable. The eclipsed conformation on the left is more stable. The eclipsed conformation on the right is more stable.O B. 01 H₂C O. C. O A. O D. For the following structural formula, pick the structure that accurately represents its MOST STABLE conformation. Br CHS A Br CH3 B H₂CH CH3 CH3 Cill Br H₂C Br с CH₂3 H₂C Br. CH3 D hp
- Identify the correct chair conformations of the following compound and then indicate which one is more stable. OH OH OH HO 1 || 4 OI and II are correct chair structures and I is most stable OI and II are correct chair structures and II is most stable OI and III are correct chair structures and III is most stable O II and III are correct chair structures and II is most stable O II and III are correct chair structures and III is most stable |||Rank these conformations from least to most stable (less stable < more stable). H. CH3 H3C. H3C CYH `H. H. H3C H H3C ČH3 II II O 1. I| < IIIBy considering viewed through the C-2-C-3 bond, which below conformations of 2,3- dibromobutane show the most stable and the least stable conformation? Clearly explain the reason, why? S CH3 H H Br. H3C, Br H3C Br Br Br H. Br CH3 ČH3 H I II III Br Br H3C, Br H3C H. H3C" H. Br ČH3 IV VCyclohexane structures can have two chair conformations. Draw the alternate conformation of the structure shown below. Rotations of the structure are not allowed. Br CI Flip HDraw the structure for the most stable chair conformation of trans-1-tert-butyl-3-chlorocyclohexane. Use the cyclohexane conformation drawing tool and guide points to draw each structure. C1 M C™ X ĈH H,C OH C2 C3 HO CH3 H Which of the following is the most stable staggered conformer? H. Me OH Me OH Me. OH Me. OH Me OH но H. Me H H Conformer A Conformer B Conformer C Conformer B because the anti OH groups avoid hydrogen bonding, which is a destabilizing effect. Conformer A because there are only two gauche interactions, and hydrogen bonding between the two OH groups is a stabilizing effect. Conformer C because there is no steric strain for Me-OH gauche interactions and hydrogen bonding between the two OH groups is a stabilizing effect. Conformer B because the large OH groups are anti to each other.SEE MORE QUESTIONS