I need help on how to draw Newman projection when asked from a specific angle. for example, draw the C2-C3 Newman looking down at that bond, looking up at that bond, looking from an angle, looking from the side etc. I NEEEED some tips and tricks so I can easily tackle foreign questions
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I need help on how to draw Newman projection when asked from a specific angle. for example, draw the C2-C3 Newman looking down at that bond, looking up at that bond, looking from an angle, looking from the side etc. I NEEEED some tips and tricks so I can easily tackle foreign questions !!!!!!
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- Draw a Newman projection, similar to Figure 3-25, down the C1¬C6 bond in the equatorial conformation of methylcyclohexane. Show that the equatorial methyl group is also anti to C5.a) Sighting down the C3-C4 bond, draw the gauche (60 degrees) and anti (180 degrees) Newman projections of 2,4-dimethylhexane. b) Circle the conformation that you drew that is lower energy.Will you always have a stable Newman chair? For example you have a cyclohexane and on 1 and 2 you have wedge methyl coming out and 4 and 5 you have dash Cl. What would the stable chair be. I think there is none
- (a) (1R,2R)-1,2-dibromocyclohexane, draw a three-dimensional representation.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.
- Complete this graph of relative potential energy vs. rotation of the C1C2 bond of ethane. Thepoint drawn for you indicates the P.E. at 0° (eclipsed).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.Draw the following butane Newman projections looking down C2-C3. Label the one with the highest and lowest potential energy.
- Build a model of 2,2,5,5-tetramethylhexane. Orient the model so that you are looking at the carbon with the arrow pointing to it in Figure 3. Align the bond to the next carbon in the chain so that it is directly behind the first carbon to match a Newman projection view. (See Figure MM.3 in the lab manual) Spin the carbons on either side of the bond you're looking down to cycle through all three staggered and all three eclipsed positions of the substituents. Draw all six positions as Newman projections on the data sheet and identify the position with the highest energy. 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.Sight along the C2-C1 bond of 2-methylpropane (isobutane).(a) Draw a Newman projection of the most stable conformation.(b) Draw a Newman projection of the least stable conformation.(c) Make a graph of energy versus angle of rotation around the C2-C1 bond.(d) Assign relative values to the maxima and minima in your graph, given that an H↔H eclipsing interaction costs 4.0 kJ/mol and an H↔CH3 eclipsing interaction costs 6.0 kJ/mol.How many stereoisomers estuary for this molecule? Show how you know. A. 8 B. 3 C. 4 D. 6