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- a. Draw trans-1-ethyl-2-methylcyclohexane in its lowest energy conformation. Choose a chair from the Templates toolbar at the bottom. Make sure it’s the appropriate chair, including any heteroatoms. Replace the appropriate hydrogens with the appropriate −CH3−CH3 or other groups. b. Draw the structure that corresponds with the name: isobutylcyclopentane.Consider the tricyclic structure B. (a) Label each substituent on the rings as axial or equatorial. (b) Draw B using chair conformations for each sixmembered ring. (c) Label the atoms on the ring fusions (the carbons that join each set of two rings together) as cis or trans to each other.Will the cyclopropane formed be facing same direction as substituents or away?(will it have dashed wedges)?
- Answer the following questions about compound A, which contains a CH3 group and OH group bonded to the carbon skeleton that consists of three six-membered rings in the conformation shown a.) Are the CH3 and OH groups oriented cis or trans to each other?b.) Is a substituent on Ca that is cis to the CH3 group located in the axial or equatorial position? c.) Is an equatorial Br at Cb oriented cis or trans to the OH group?d.) Is the H atom on Cc located cis or trans to the OH group?e.) Is a substituent on Cd that is trans to the OH group located in the axial or equatorial position?Answer the following questions about compound A, which contains a CH3 group and OH group bonded to the carbon skeleton that consists of three six-membered rings in the conformation shown.a.Are the CH3 and OH groups oriented cis or trans to each other? b. Is a substituent on Ca that is cis to the CH3 group located in the axial or equatorial position? c. Is an equatorial Br at Cb oriented cis or trans to the OH group? d. Is the H atom on Cc located cis or trans to the OH group? e.Is a substituent on Cd that is trans to the OH group located in the axial or equatorial position?Consider the attached tricyclic structure B. (a) Label each substituent on the rings as axial or equatorial. (b) Draw B using chair conformations for each sixmembered ring. (c) Label the atoms on the ring fusions (the carbons that join each set of two rings together) as cis or trans to each other.
- For pentane draw Newman projections for the Syn-periplanar, conformation. the Anti- periplanar conformation and a Gauche conformation. Use C2 as the front carbon and C3 as the back carbon. Label each conformation, circle the highest energy conformation andunderline the lowest energy conformation.True or False: 1. The eclipsed conformation of a linear alkane IS called cis, while the anti conformation of an alkane IS called trans. 2. In the conversion of open-chain D-glucose to the ring form, the aldehyde carbon (carbon #1) bonds to the oxygen on carbon number 5 to form a ring that is both PYRANOSE and UNLOCKED.According to the following structure, draw the Newmann projections in which you must indicate: a) the most stable conformation and explain why it is more stable, b) the least stable conformation and explain why; c) a conformation where there is a gauche interaction.
- Give IUPAC name of the following molecule and indicate Z or E. Answer all four of themDraw the most stable conformation of the disubstituted cyclohexane below.Construct a qualitative potential energy diagram for rotation about C-C bond of 1,2-dibromoethan. Which conformation would you expect to be more stable? label the anti and gauche conformation of 1,2-dibromoethane