3. A. Draw the Newman Projection of pentane looking downthe C2-C3 bond in a staggered confirmation.B. Draw an energy diagram showing the conformationalanalysis using the Newman Projection above (showing a 360degree total rotation, 60 degrees at a time). Hint – see Figure4.6, 4.9 and 4.11 for examples. Estimate the potential energy ofeach 60 degree turn as you do not have data to calculate thevalues exactly. Label each Newman Projection asstaggered/eclipsed or gauche/anti as appropriate.

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Answered: 3. A. Draw the Newman Projection of…

Organic Chemistry: A Guided Inquiry

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Chapter6: Alkanes & Alkenes

Section: Chapter Questions

Problem 10CTQ: Consider the Newman projection below. a. Draw a full Lewis structure of this molecule with...

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Build a model of methylcyclohexane, and use the model to complete the following Newmanprojections of methylcyclohexane in the chair conformation: a. When the methyl group is in an axial or equatorial (circle one) position, the molecule is inits lowest potential energy conformation. b. Label one Newman projection above anti and the other gauche to describe the relationshipbetween the methyl group and C3 of the ring. c. In general, which is a lower PE conformation, anti or gauche? d. Explain how your answer to b and c provide an explanation for why it is more favorable fora large group to be in an equatorial than an axial position.
Consider the Newman projection below. a. Draw a full Lewis structure of this molecule with R1=Me,R2=Et , and R3=iPr . b. Given the sizes of these R groups (R3R2R1) , does the Newman projection above show thelowest potential energy conformation of this bond? If not, draw a Newman projectionshowing the lowest P.E. conformation (sighting down this same bond). c. To draw a Newman projection in the lowest P.E. conformation, the following rule of thumbusually applies: Place the largest group on the front carbon anti to the largest group on theback carbon. Is your answer to the previous question consistent with this rule of thumb?
Consider the molecule 1-bromo-2-methylbutane. C3 and C4 should be drawn as Et as in theexample. This group is called an ethyl group and can be considered a sphere about twice the sizeof a methyl group. Draw the following Newman projections sighting down the C1C2 bond... a. The lowest potential energy conformation. b. The highest potential energy staggered conformation.
to Medical Chemistry II. (BMC1CHEM02) oard / My courses / Introduction to Medical Chemistry II. (BMCICHEM02) / 29/03 2021 Chemistry Electronic te Electronic test in Chemistry n3 Cyclobutane is more stable molecule than cyclopropane, because.... Select one: ut of it has less angle strain. cyclobutane has a cis-trans stereoisomers. cyclobutane is a larger ring. it has more torsional strain. cyclopropane is planar. Next page
.....Draw the Newman pr0jecti0ns 0f the three p0ssible staggered c0nf0rmati0ns 0f2,3-dimethylbutane, viewed thr0ugh the C2—C3 b0nd. What are the relativeenergies of each c0nf0rmati0n?
2. For the following structure: (1S, 2R, 4R)-2-chloro-1-isopropyl-4-methylcyclohexane a. draw both chair conformations for the molecule b. identify whether the more stable stereoisomer.
4. Clearly draw both Chair Conformations. of the following molecule Xordin 5. for the Molecule in Question 4 - Circle the lowest energy Chair Conformat. TAM!
For the the structure shown below, Part A) Draw the Newman projections and 3-D sawhorse structures corresponding to the lowest and highest energy conformations for rotation around the C2-C3 bond. Draw the Newman projections looking FROM THE C2 CARBON TO THE C3 CARBON (i.e. with the C2 carbon in the "front"). Part B) Determine the energy difference between the lowest and highest conformations, and be sure to clearly show each energy contribution that you are including in your calculation. 2,3-dimethylpentane ECLIPSING Interactions AB Energy kcal/mol H/H 1.0 H / Me 1.4 H/Et 1.5 H/i-Pr 1.6 H/t-Bu 3.0 Me / Me 2.6 Me / Et 2.7 Me/i-Pr 3.0 GAUCHE A. Interactions Me / Me Me / Et Me / i-Pr Me / t-Bu Et / Et Et / -Pr Et/t-Bu i-Pr/i-Pr B Energy kcal/mol 0.9 0.95 1.1 2.7 1.1 1.6 3.0 2.0
For the the structure shown below, Part A) Draw the Newman projections and 3-D sawhorse structures corresponding to the lowest and highest energy conformations for rotation around the C2-C3 bond. Draw the Newman projections looking FROM THE C2 CARBON TO THE C3 CARBON (i.e. with the C2 carbon in the "front"). Part B) Determine the energy difference between the lowest and highest conformations, and be sure to clearly show each energy contribution that you are including in your calculation. Lowest Energy Conformation 3-D sawhorse Newman ECLIPSING Interactions AB H/H H/Me H / Et H/i-Pr Energy kcal/mol 1.0 1.4 1.5 1.6 H/ t-Bu 3.0 Me / Me 2.6 Me / Et 2.7 Mei-Pr 3.0 GAUCHE A. Interactions Me / Me Me / Et Me / i-Pr Me / t-Bu Et / Et Et/i-Pr Et / t-Bu i-Pr/i-Pr 3-D sawhorse Energy kcal/mol Newman 0.9 0.95 1.1 2.7 1.1 1.6 Highest Energy Conformation 3.0 2.0
Which of the following Newman projections correspond to a conformation of (R)-2-methylpentan-3-ol? (choose all correct) CH3 COH H. H H OH H,C CH3 H. H3C. OH H3C H. но, CH3
. Consider the hash/wedge structure below. a. Draw the Newman projection of the bond indicated, keeping the conformation the same. НО b. Draw the Newman projection for the most stable conformation CI c. In the Newman projection for part b, label all gauche interactions.
Draw all the conformers of methyl cylobutane and also the corresponding energy profile

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