Build a model of 2,2,5,5-tetramethylhexane. Draw the six Newman projections of all of the different energy levels. Label each as staggered or eclipsed and rank in order from lowest energy to highest.
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- Build a model of 2,2,5,5-tetramethylhexane.
Draw the six Newman projections of all of the different energy levels. Label each as staggered or eclipsed and rank in order from lowest energy to highest.
Step by step
Solved in 2 steps with 2 images
- a. For each disubstituted cyclohexane below, draw its ring-flip isomer. Circle the most stable conformation and label the substituent groups as axial or equatorial. ( see image) b.Draw and name the seven constitutional isomers (all contain a ring of some size) for cycloalkane, C6H12.2. Convert the following bond-line structure to Newman projections that represents it lowest energy and highest energy conformations. Look down the indicated C2-C3 bond. lowest energy highest energyUse flat representation of rings, not chair in the drawing. Determine the most and least stable. Consider the most stable chair for each of these isomers, and then draw the most stable and least stable isomer based on a comparison of the best chair for each one.
- What does the most stable Newman Projection of 2,2 dimethyl hexane look like?Using your model, construct an energy diagram to show the variation in the free energy of the molecule as the FRONT ATOM is rotated CLOCKWISE from 0º to 360º in 60º increments. In your energy diagram, you should clearly show the relative energies of each conformer.Potential Energy 4. DRAW the line structure of 2-chloro-5-bromohexane. DRAW the 3 eclipsed Newman projections for this compound above the PES, and the 3 staggered Newman projections for this compound below the PES - Organizing them on a curve of potential energy vs. angle of rotation sighting along the C3-C4 bond. Be sure to draw/label the Newman projections of the conformations that correspond to each energy minimum and maximum. Your curve should clearly indicate the relative stabilities of the different conformations. HO 10 8
- A Newman projection of a disubstituted cyclohexane is shown below. etermine which of the following 2D representations matches the Newman projection. H Br H2 CH3 H H2 Br II Br Br CH3 ICH3 Brl. Br II Br CH3 IV H3C Br Br Br A) I B) II C) II D) IV5. a-G a- Convert the following Newman projection into the bond line structural formula. Must use stereobonds to indicate the orientation of the groups. H3CO CN b- Draw the anti, gauche, and eclipsed conformations of the following molecule using Newman projection. H H H H c- i. Which cyclopropane molecule has the highest torsional strain? ii. Which cyclopropane molecule has the lowest torsional strain? C b aC. Using your molecular modeling kit, construct cis-1,4-dimethylcyclohexane. In the space below, draw one of the chair conformations. Label the methyl groups as either axial (a) or equatorial (e). Number the carbons of the cyclohexane ring, perform a chair flip and draw the new chair conformation.