Cyclohexane: 1.Make a boat conformation. 2.Then a chair conformation In which case are the C-H bonds...
Cyclohexane:
1.Make a boat conformation.
2.Then a chair conformation In which case are the C-H bonds on neighboring carbons eclipsing the most?
3. In which case do the H atoms on C1 and C4 approach each other most closely?
4. Based on what you saw above, which will be the most stable conformation of cyclohexane? Draw both conformations
Homework Answers
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Cyclohexane:
1.Make a boat conformation.
2.Then a chair conformation In which case are the C-H bonds...
1. Draw (1S,3S)-3-aminocyclohexanecarbonitrile structure below: 2. Draw the two chair conformations of the above disubstituted cyclohexane...
1. Draw (1S,3S)-3-aminocyclohexanecarbonitrile structure below: 2. Draw the two chair conformations of the above disubstituted cyclohexane compound, before and after ring-flip. 3. Draw the Newman projections of both chair conformations about the C1−C6 and C3−C4 bonds. 4. Which conformation is the least stable one? Briefly explain your answer with words AND by showing it on the appropriate Newman projection.
with explanation 1) Draw a chair conformation of cyclohexane. Then, draw and level properly all axial...
with explanation
1) Draw a chair conformation of cyclohexane. Then, draw and level properly all axial and equatorial positions on chair form of cyclohexane. 2) Draw chair, half-chair and boat conformations of ethyl cyclohexane and draw an energy diagram to explain their relative stability: 3) Draw two possible chair conformations for each of the mono-substituted cyclohexanes and determine their relative stability with proper explanation. OH 4) Draw two possible chair conformations for each of the di-substituted cyclohexanes and determine their...
(2) Cyclohexane (CH) has two conformations, i.e. the chair conformation (e) and boat conformation (b). At...
(2) Cyclohexane (CH) has two conformations, i.e. the chair conformation (e) and boat conformation (b). At 298 °K, the chair conformation (e) is at the ground state with energy = 0; and the boat conformation (b) is at the energy level of 22,000 J/ mol. (i) Calculate the molecular partition function (q) of cyclohexane at 298 ®K. (ii) Calculate the Boltzmann distribution (the most probable distribution) of the two conformations, and respectively. (iii) Compare these two conformations, which conformation is...
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...
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...
Draw the following substituted cyclohexane in its most stable chair conformation. Clearly indicate which bonds are...
Draw the following substituted cyclohexane in its most stable
chair conformation. Clearly indicate which bonds are axial and
which bonds are equatorial and provide the systematic name for this
compound, using R/S designations to indicate stereochemistry.
CH3 CI CH3 CH3 H3C
38. Provide the correct hexagonal conformation or Ring-flipped chair conformations for the following cyclohexane (as parent...
38. Provide the correct hexagonal conformation or Ring-flipped chair conformations for the following cyclohexane (as parent chain) compounds. Then circle the more stable chair conformation. Flat Hexagon structure Chair conformation A H Chair conformation B CHS 2 Dr 2 Br 3 CH3 2 5 3 39. The following compounds have 2 stereogenic carbons, therefore 4 stereoisomeric structures (3 if there is a meso-form) These are not cyclic compounds. a) Draw the structure. b) Identify the stereogenic carbons. Assign the Cahn-Ingold-Prelog...
3. (10 pts) For each cyclohexane, draw both chair conformations and circle the conformation that is...
3. (10 pts) For each cyclohexane, draw both chair conformations and circle the conformation that is more stable (use the relative size of each substituent to determine which has more 1,3-diaxial strain) S-Bu NH2 t-Bu /25 pts
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...
Make3 a model of cyclopentane. Does this molecule seem to have any ring strain in the...
Make3 a model of cyclopentane. Does this molecule seem to have any ring strain in the sense that the three and four-membred rings do? The molecule is not completely strin-free because there is some eclipsing. Identify the eclipsed atoms or groups when the molecule is planar. In fact the molecule is not planar, but is puckered in either of two ways; (i) One C-atom is abover or below the plane defined by the other four coplanar C-atoms defining an envelope...
with explanation
1) Draw a chair conformation of cyclohexane. Then, draw and level properly all axial and equatorial positions on chair form of cyclohexane. 2) Draw chair, half-chair and boat conformations of ethyl cyclohexane and draw an energy diagram to explain their relative stability: 3) Draw two possible chair conformations for each of the mono-substituted cyclohexanes and determine their relative stability with proper explanation. OH 4) Draw two possible chair conformations for each of the di-substituted cyclohexanes and determine their...
(2) Cyclohexane (CH) has two conformations, i.e. the chair conformation (e) and boat conformation (b). At 298 °K, the chair conformation (e) is at the ground state with energy = 0; and the boat conformation (b) is at the energy level of 22,000 J/ mol. (i) Calculate the molecular partition function (q) of cyclohexane at 298 ®K. (ii) Calculate the Boltzmann distribution (the most probable distribution) of the two conformations, and respectively. (iii) Compare these two conformations, which conformation is...
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...
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...
Draw the following substituted cyclohexane in its most stable
chair conformation. Clearly indicate which bonds are axial and
which bonds are equatorial and provide the systematic name for this
compound, using R/S designations to indicate stereochemistry.
CH3 CI CH3 CH3 H3C
38. Provide the correct hexagonal conformation or Ring-flipped chair conformations for the following cyclohexane (as parent chain) compounds. Then circle the more stable chair conformation. Flat Hexagon structure Chair conformation A H Chair conformation B CHS 2 Dr 2 Br 3 CH3 2 5 3 39. The following compounds have 2 stereogenic carbons, therefore 4 stereoisomeric structures (3 if there is a meso-form) These are not cyclic compounds. a) Draw the structure. b) Identify the stereogenic carbons. Assign the Cahn-Ingold-Prelog...
3. (10 pts) For each cyclohexane, draw both chair conformations and circle the conformation that is more stable (use the relative size of each substituent to determine which has more 1,3-diaxial strain) S-Bu NH2 t-Bu /25 pts
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...
Make3 a model of cyclopentane. Does this molecule seem to have any ring strain in the sense that the three and four-membred rings do? The molecule is not completely strin-free because there is some eclipsing. Identify the eclipsed atoms or groups when the molecule is planar. In fact the molecule is not planar, but is puckered in either of two ways; (i) One C-atom is abover or below the plane defined by the other four coplanar C-atoms defining an envelope...
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