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- The energy difference between a tert-butyl group going from equatorial to axial in a cyclohexane is 18.3 kJ/mol. When two of the carbon atoms are replaced with oxygen atoms (molecule B) the energy difference between the two chair conformations drops to 5.9 kJ/mol. Explain this difference. (Hint: Consider what makes putting groups axial unfavorable).5) relationship between the pairs of structures. NOTE: Each term may be used more than Choose the term from the five terms listed below that BEST describes the once and not all terms need be used. Identical Diastereomers Enantiomers Constitutional isomers Not isomers CH3 CH3 ÇI H3C-Br CH3 Br -CI H,C. D-H H3C- Br H- -D Br CH3 -CI ČH3 OH H3C, CHO OHC, OH OH H. HO CHO OHC CH3 H. OH ÓH4. Zingiberene, a terpene found in ginger, has the following structure. Classify the rt?bonds in zingiberene as conjugated, cumulated or isolated.
- Consider 1,2-dimethylcyclohexane.Q: Draw the two possible chair conformations for the cis isomer. Which conformation, if either, is more stable?why is this the chair conformation for the cyclohexane? also is the chair conformation cis or transDiscuss and compare two possible chair conformations of cis-1,3-dibromocyclohexane compound. Which conformation is more stable? Why? Explain the reason clearly.
- The following are ...... O Consitutional Isomers Same compound Stereoisomers Different compounds (not isomers)I don't understand why the first one and second one are cis and trans respectively. Wouldn't the first one be trans-1,2-dimethylcyclobutane because the torsional strain wouldn't allow the carbons to be in the same conformation. Meaning one of the carbons would be up and then the next would be down and so on. Since both methyl groups are equatorial and the first and second carbons are arranged up and down, wouldn't it be trans. Same logic for the second molecule. Carbon 1, which is attached to the methyl is down, carbon 3 which is attached to the methyl should be down also because of torsional strain, and since both methyl are in axial (or equatorial?), it would be cis. Or is it based off of the way the carbons are positioned in the picture?5.There are two important methods that are used to prepare alkenes: they are: . and . Your answer