Homework Answers
The Flip model would be
Comparing the structure with mirror image would be
Comparing the flip model both the structures contain one axial and one equitorial Cl. so both will have same energy and both will be equally stable.
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10. Flip model G to the other chair conformation and sketch it in the box provided....
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...
13. Below are the planar hexagon representations for two substituted cyclohexanes. Using the chair conformations provided,...
13. Below are the planar hexagon representations for two substituted cyclohexanes. Using the chair conformations provided, draw the chair conformation for these compounds a and b and indicate the most stable conformation (if applicable) for each of these two compounds. 3 points) CH C(CH3)3 CH3 CH3 CH3 н H H н А B Compound A "flip" Compound B "flip"
1. Draw a chair conformation of cis-1-tert-butyl-2-ethyleyclohexane. Then, ring flip the chair to generate the other...
1. Draw a chair conformation of cis-1-tert-butyl-2-ethyleyclohexane. Then, ring flip the chair to generate the other chair conformation, Circle the most stable conformation of the molecule (8 pts). 2. Designate the RIS configuration of all the stereocenters in the following molecules (8 pts): OH HO+CH3 H oH CHCI 3. Identify the relationship between the following molecules as: identical, constitutional isomers. enantiomers, or diastereomers (8 pts). enantiomers. e home enantiomers diastereomers. ó Tenantiomers. I Ć dias tereomers. MAC mome of the...
Using the templates provided, draw the planar representation (use wedges and dashes!) and both chair conformations...
Using the templates provided, draw the planar representation (use wedges and dashes!) and both chair conformations of the models of 1,3-dichlorocyclohexane Is one chair conformer lower in energy? If so, circle the appropriate conformation above Are the two chlorine atoms cis- or trans- to each other? Can both chlorine atoms be axial in any chair conformation? Would a solution of model A rotate plane polarized light? Why or why not? Is model A a meso compound? Model B? Model B?...
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...
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...
1. Construct a model of the 2,3-dibromopentane isomer and label the chiral centers as R or...
1. Construct a model of the 2,3-dibromopentane isomer and label the chiral centers as R or S. Then make a model of its mirror image and draw it below, again labeling the chiral centers as R or S. a. Convert both models to their most stable conformation and draw their Newman projections looking down the center bond. b. On one model interchange the H and Br on one of the chiral centers. How is this molecule related...
1. Construct a model of the 2,3-dibromopentane isomer and label the chiral centers as R or S. The...
1. Construct a model of the 2,3-dibromopentane isomer and label the chiral centers as R or S. Then make a model of its mirror image and draw it below, again labeling the chiral centers as R or S. a. Convert both models to their most stable conformation and draw their Newman projections looking down the center bond. b. On one model interchange the H and Br on one of the chiral centers. How is this molecule related to the other...
Construct model E which has the chlorine atom at C-1 in the equatorial position and the...
Construct model E which has the chlorine atom at C-1 in the equatorial position and the chlorine atom at C-3 in the axial position. 1. 2. 3· Construct the mirror image of model E. The structure of model E is provided. Sketch the structure of its mirror image in the box provided mirror Cl Model E 4. Does the structure represented by model E have one or more stereocenters? If yes, how many and then indicate the chiral center(s) on...
please help with the second page. Lab Section (Day & Time) Task Viswalizing chair clohexanes Filem...
please help with the second page.
Lab Section (Day & Time) Task Viswalizing chair clohexanes Filem : Menthol is a mild analgesic present in couch latene Complete the following scheme bused on the Newman project present in cough lozenges and a variety of topical pain medication. based on the New l ection of the chair conformations of -menthol Newman projection of menthol indicated below to construct your model. CHAIR 2 own below. Obe - CHAIRI NO OHH H CHE chair-chair...
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...
13. Below are the planar hexagon representations for two substituted cyclohexanes. Using the chair conformations provided, draw the chair conformation for these compounds a and b and indicate the most stable conformation (if applicable) for each of these two compounds. 3 points) CH C(CH3)3 CH3 CH3 CH3 н H H н А B Compound A "flip" Compound B "flip"
1. Draw a chair conformation of cis-1-tert-butyl-2-ethyleyclohexane. Then, ring flip the chair to generate the other chair conformation, Circle the most stable conformation of the molecule (8 pts). 2. Designate the RIS configuration of all the stereocenters in the following molecules (8 pts): OH HO+CH3 H oH CHCI 3. Identify the relationship between the following molecules as: identical, constitutional isomers. enantiomers, or diastereomers (8 pts). enantiomers. e home enantiomers diastereomers. ó Tenantiomers. I Ć dias tereomers. MAC mome of the...
Using the templates provided, draw the planar representation (use wedges and dashes!) and both chair conformations of the models of 1,3-dichlorocyclohexane Is one chair conformer lower in energy? If so, circle the appropriate conformation above Are the two chlorine atoms cis- or trans- to each other? Can both chlorine atoms be axial in any chair conformation? Would a solution of model A rotate plane polarized light? Why or why not? Is model A a meso compound? Model B? Model B?...
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...
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...
Construct model E which has the chlorine atom at C-1 in the equatorial position and the chlorine atom at C-3 in the axial position. 1. 2. 3· Construct the mirror image of model E. The structure of model E is provided. Sketch the structure of its mirror image in the box provided mirror Cl Model E 4. Does the structure represented by model E have one or more stereocenters? If yes, how many and then indicate the chiral center(s) on...
please help with the second page.
Lab Section (Day & Time) Task Viswalizing chair clohexanes Filem : Menthol is a mild analgesic present in couch latene Complete the following scheme bused on the Newman project present in cough lozenges and a variety of topical pain medication. based on the New l ection of the chair conformations of -menthol Newman projection of menthol indicated below to construct your model. CHAIR 2 own below. Obe - CHAIRI NO OHH H CHE chair-chair...
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