11. Which one of these forms of 1,2,4-trimethylcyclohexane can have a chair conformation in which the methyl groups are all equatorial? III ++ |||| A B с D E
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- Use your answers from Problem 2.48 to complete the table showing correlations between cis,trans and axial,equatorial for disubstituted derivatives of cyclohexane. Draw the alternative chair conformations for the cis and trans isomers of 1,2-dimethylcyclohexane, 1,3-dimethylcyclohexane, 1,4-dimethylcyclohexane. (a) Indicate by a label whether each methyl group is axial or equatorial.cOH CH2OH H, ОН Н Ha ÓH H In its most stable chair conformation, indicate the orientation of each of the labeled groups in this substituted cyclohexane. Group a: equatorial Group b: axial Group c: equatorialNone
- Which of the following compounds are trans-1-bromo-3-methylcyclohexane? A I and III B II and III C III and IV D I and IVH3C HC 10 aH CH3 In its most stable chair conformation, indicate the orientation of each of the labeled groups in this substituted cyclohexane. Group a: Group b: Group c:What 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
- d Copy the following structures into your notebook and determine the absolute configuration of each chiral center: H3CH₂C F Cl H H MIC1 CH3 ||| BI H₂CH₂C H H I ||||| CH₂CH₂CH3 "III COOH H OH OH6) Draw the energetically favored (more stable) chair conformer of the following cyclohexane. H3C OH 110cỌH CH OH ОН Н Ha ОН In its most stable chair conformation, indicate the orientation of each of the labeled groups in this substituted cyclohexane. Group a: equatorial Group b: axial Group c: equatorial
- Name the following hydrocarbons with functional groups, parent chain and bondsÁll of the following conformational models are representative of 2,3-dimethylpentane. Which of these models corresponds to its S isomer? Me H Et Me H. Ме Et H Me Me H. Me Me H H H -iPr Me iPr. H Me Me HRank the conformations of n-butane with reference to its potential energy from the most stable to the least stable. Rank from the most stable to the least stable. To rank items as equivalent, overlap them.