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Conformational Analysis of Cyclohexane1. Draw both forms of the chair conformation of cyclohexane(right and left facing).2. Draw a chair conformation of cyclohexane...

Question

Conformational Analysis of Cyclohexane1. Draw both forms of the chair conformation of cyclohexane(right and left facing).2. Draw a chair conformation of cyclohexane with only the axialhydrogen atoms shown.3. Draw a chair conformation of cyclohexane with only theequatorial hydrogen atoms shown.4. Draw the process of ring-flip of cyclohexane. Include bothchair conformations and the boat conformation.5. Draw a Newman projection of cyclohexane as viewed down theC1-C2, C5-C4 bonds.6. Draw methylcyclo

Conformational Analysis of Cyclohexane 1. Draw both forms of the chair conformation of cyclohexane (right and left facing). 2. Draw a chair conformation of cyclohexane with only the axial hydrogen atoms shown. 3. Draw a chair conformation of cyclohexane with only the equatorial hydrogen atoms shown. 4. Draw the process of ring-flip of cyclohexane. Include both chair conformations and the boat conformation. 5. Draw a Newman projection of cyclohexane as viewed down the C1-C2, C5-C4 bonds. 6. Draw methylcyclohexane as a chair structure. Also show the ring-flip conformation of methylcyclohexane. Label each structure as high, low or equal relative energy. 7. Draw methylcyclohexane using a Newman projection as viewed down the C1-C2, C5-C4 bonds. Show the ring-flip conformation also using a Newman projection. Label each as high, low or equal relative energy. Indicate any interactions that are present in each structure (gauche, 1,3-diaxial, etc.) 8. Repeat the directions in exercise 7 for cis-1,2-dichlorocyclohexane. 9. Repeat the directions in exercise 7 for trans-1,2-dichlorocyclohexane. 10. Draw trans-1,3-dimethylcyclohexane using a Newman projection as viewed down the C1-C6, C3-C4 bonds. Show the ring-flip conformation also using a Newman projection. Label each as high, low or equal relative energy. Indicate any interactions that are present in each structure (gauche, 1,3-diaxial, etc.) 11. Draw cis-1,3-dibromocyclohexane using a Newman projection as viewed down the C1-C6, C3-C4 bonds. Show the ring-flip conformation also using a Newman projection. Label each as high, low or equal relative energy. Indicate any interactions that are present in each structure (gauche, 1,3-diaxial, etc.) 12. Draw trans-1-isopropyl-3-methylcyclohexane using a Newman projection as viewed down the C1-C6, C3-C4 bonds. Show the ring-flip conformation also using a Newman projection. Label each as high, low or equal relative energy. Indicate any interactions that are present in each structure (gauche, 1,3-diaxial, etc.)



Answers

Draw a chair conformation of cyclohexane with one CH$_3$CH$_2$ group and one CH$_3$ group that fits each description:
a. a 1, 1-disubstituted cyclohexane with an axial CH$_3$CH$_2$ group
b. a cis-1,2-disubstituted cyclohexane with an axial CH$_3$ group
c. a trans-1,3-disubstituted cyclohexane with an equatorial CH$_3$ group
d. a trans-1,4-disubstituted cyclohexane with an equatorial CH$_3$CH$_2$ group

Every job on the bond stick model Teo. Show more of a skeletal structure here and number the carbons. One, two, three and four to the substitute int on carbon one. It's the methyl group. The hydrogen I've drawn is in the equatorial position. Theme. Ethel Group is in the axial position. So, Axl, for that substitute carbon to the hydrogen is going straight up. So it is in the axle position. The Brahman is coming out, so it's in the equatorial position and on carbon for the hydrogen is going straight up. So it's axial and thie. Isopropyl group is equatorial substitue INTs one in two are both going down relative to the hydrogen. So there sits there on the same side of the ring. Substitue INTs two and four are both going down relative to the hydrogen. Since they're on the same side of the rain, they must also be sis and drawing the other chair come from er I find it easiest to flip this carbon up, Miss carbon down. So this is going to be carbon number one, two, three and four. Carbon one still has a method group, and it is still going down relative to the hydrogen, so it's going to flip from the axial position to the equal Torrey Yl. The bromide here is going to still be going down, and the isopropyl group is still going to be going down on carbon for so this would be the way to draw the other chair confirmation. And that puts it, flips all the groups from Axl to Equatorial and vice versa. So the group that was actual is now equatorial in the groups that Rick Material are now in the axial positions. So this is going to be less favored, less stable than the chair compromise that they gave us because now you have two groups in the axial position that's very hysterically hindered, and it's not a stable, so less stable.


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