PART B: Cyclohexane Procedures: 1. Make a model of cis-1,2-dimethylcyclohexane and trans-1,2-dimethylcyclohexane. Do a ring flip...
PART B: Cyclohexane
Procedures:
1. Make a model of cis-1,2-dimethylcyclohexane and trans-1,2-dimethylcyclohexane. Do a ring flip of both
*Draw the two conformation of the cis and trans cyclohexane structures above
*List the number of axial and equatorial substituents for both the cis and trans
*Which isomer is more stable overall, cis or trans? Why?
2. Make a model cis-1,3-dimethylcyclohexane and trans-1,3-dimethylcyclohexane. Do a ring flip
*Draw the two conformation of the cis and trans cyclohexane structures above
*List the number of axial and equatorial substituents for both the cis and trans
*Which isomer is more stable overall, cis or trans? Why?
3. Make a model of cis and trans 1-isopropyl-2-methylcyclohexane.
*Draw the two conformation of the cis and trans cyclohexane structures above
* List the number of axial and equatorial substituents for both the cis and trans
* Which isomer is more stable overall, cis or trans? Why?
Homework Answers
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PART B: Cyclohexane
Procedures:
1. Make a model of cis-1,2-dimethylcyclohexane and
trans-1,2-dimethylcyclohexane. Do a ring flip...
1. Now construct cis-1,2-dimethylcyclohexane in the chair conformation and draw it. Perform the ring flip and...
1. Now construct cis-1,2-dimethylcyclohexane in the chair conformation and draw it. Perform the ring flip and draw that conformation. Which of the two conformations is preferred? This compound is meso, find the conformation that accounts for this? 2. Construct and draw trans-1-ethyl-2-methylcyclohexane in the chair conformation. Perform the ring flip and draw that conformation. Which conformation is preferred/most stable? Why? Construct and draw the cis isomer in the most stable chair conformation. Perform the ring flip and draw that conformation....
Please make hand writing neat. Thank you:) 12. Construct cis-1,3-dimethylcyclohexane by placing both -CH, groups in...
Please make hand writing neat. Thank you:)
12. Construct cis-1,3-dimethylcyclohexane by placing both -CH, groups in the axial Which is the more positions. Do ring flips and examine the two chair conformations. stable conformation? Explain your answer (12) 13. Construet trans-1,3-dimethylcyclohexane by placin g one- CH3 group axial and the other equatorial. Do ring flips and examine the two chair conformations. the more stable conformation? Explain your answer (13a). Given the two1 trans-1,3-dimethylcyclohexane and cis-1,3-dimethyleyc stable isomer? Explain your answer...
6. Build the cyclobutane ring and study the angle strain and torsional strain. Draw the structures to explain thes...
6. Build the cyclobutane ring and study the angle strain and torsional strain. Draw the structures to explain these factors. 7. The conformation of cyclobutane is slightly folded. Folding gives partial relief from the eclipsing of bonds, as shown in the Newman projection. Compare this actual structure with the hypothetical planar structure. Draw the relevant structures. 8. trans-1,2-Dimethylcyclobutane is more stable than cis-1,2-dimethylcyclobutane, but cis-1,3- dimethylcyclobutane is more stable than trans-1,3-dimethylcyclobutane. Use the molecular models to find the reasons for...
I'm confused with the ring flip 3. (10 points) chair A. The cyclohexane ring depicted below...
I'm confused with the ring flip
3. (10 points) chair A. The cyclohexane ring depicted below undergoes a chair-flip to form CH3 H3C H3C CH3 chair lip CHa (a) Draw the missing substituents on chair A, clearly indicating whether they are in the axial or equatorial positions. (6 points) b) Are the bromide and hydroxyl groups cis or trans to each other? (2 points) (c) Is one chair conformation energetically more stable than the other? If so, indicate which chair...
002OU NAME (PRINT): 10.30.19 RING FLIP (5P75): Provide the ring-flipped conformation for CIS 1,3-dimethylcyclohexane A. Circle...
002OU NAME (PRINT): 10.30.19 RING FLIP (5P75): Provide the ring-flipped conformation for CIS 1,3-dimethylcyclohexane A. Circle the conformation that is lower in energy. B Label bonds off chair as A for axial and E for equatorial. C. Number carbons in chair. EXAMPLE Lower in Energy g
Help Organic Chem part 4 Cyclohexane Conformations Put your model of cis-1,3-dichlorocyclohexane into a chair conformation....
Help Organic Chem part 4
Cyclohexane Conformations Put your model of cis-1,3-dichlorocyclohexane into a chair conformation. Sometimes the easiest way to do this is by adjusting it to make the axial bonds alternate up and down. Now convert it to the other chair structure, asking the instructor for help if needed. Is the second conformation still cis or is it trans? Are the two conformations the same or are they different? Draw chair structures of both conformations making sure to...
Laboratory Work 1. Draw the skeletal formulas and make models of the three constitutional isomers of...
Laboratory Work 1. Draw the skeletal formulas and make models of the three constitutional isomers of C5H12. 2. Draw Kekule structures and make models of all the constitutional isomers of C2H4Cl2. 3. Draw Kekule formulas and make models of ethane, ethene, and ethyne. How does the geometry of their structures differ? Which compound contains sp hybridized carbons? 4. Draw and label the Newman projection and make the model of the anti-conformation of 1,2-dibromoethane. Rotate around the carbon-carbon bond...
9. Draw the chair conformations of the substitute cyclohexanes showing the ring flip.. Show axial and...
9. Draw the chair conformations of the substitute cyclohexanes showing the ring flip.. Show axial and equitorial bonds clearly. Label which conformation is most stable or if @ l-ethyl cyclohexane they are equal. O CIS-1,2-dimetyl cyclohexane © trans-1,2-dimethyl cyclohexane
Draw the newman projections for 1,4 dimethylcyclohexane for cis and trans with ring flip. there should...
Draw the newman projections for 1,4 dimethylcyclohexane for cis and trans with ring flip. there should be 4 newman projections.
11. Build the chair and boat conformations and identify the most stable conformation. Identify the 1,3-diaxial inte...
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...
Please make hand writing neat. Thank you:)
12. Construct cis-1,3-dimethylcyclohexane by placing both -CH, groups in the axial Which is the more positions. Do ring flips and examine the two chair conformations. stable conformation? Explain your answer (12) 13. Construet trans-1,3-dimethylcyclohexane by placin g one- CH3 group axial and the other equatorial. Do ring flips and examine the two chair conformations. the more stable conformation? Explain your answer (13a). Given the two1 trans-1,3-dimethylcyclohexane and cis-1,3-dimethyleyc stable isomer? Explain your answer...
6. Build the cyclobutane ring and study the angle strain and torsional strain. Draw the structures to explain these factors. 7. The conformation of cyclobutane is slightly folded. Folding gives partial relief from the eclipsing of bonds, as shown in the Newman projection. Compare this actual structure with the hypothetical planar structure. Draw the relevant structures. 8. trans-1,2-Dimethylcyclobutane is more stable than cis-1,2-dimethylcyclobutane, but cis-1,3- dimethylcyclobutane is more stable than trans-1,3-dimethylcyclobutane. Use the molecular models to find the reasons for...
I'm confused with the ring flip
3. (10 points) chair A. The cyclohexane ring depicted below undergoes a chair-flip to form CH3 H3C H3C CH3 chair lip CHa (a) Draw the missing substituents on chair A, clearly indicating whether they are in the axial or equatorial positions. (6 points) b) Are the bromide and hydroxyl groups cis or trans to each other? (2 points) (c) Is one chair conformation energetically more stable than the other? If so, indicate which chair...
002OU NAME (PRINT): 10.30.19 RING FLIP (5P75): Provide the ring-flipped conformation for CIS 1,3-dimethylcyclohexane A. Circle the conformation that is lower in energy. B Label bonds off chair as A for axial and E for equatorial. C. Number carbons in chair. EXAMPLE Lower in Energy g
Help Organic Chem part 4
Cyclohexane Conformations Put your model of cis-1,3-dichlorocyclohexane into a chair conformation. Sometimes the easiest way to do this is by adjusting it to make the axial bonds alternate up and down. Now convert it to the other chair structure, asking the instructor for help if needed. Is the second conformation still cis or is it trans? Are the two conformations the same or are they different? Draw chair structures of both conformations making sure to...
9. Draw the chair conformations of the substitute cyclohexanes showing the ring flip.. Show axial and equitorial bonds clearly. Label which conformation is most stable or if @ l-ethyl cyclohexane they are equal. O CIS-1,2-dimetyl cyclohexane © trans-1,2-dimethyl cyclohexane
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...
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