4- Use Newman projections to represent the most stable conformer for the following molecules (remember to assign Gauche interactions). Br HN аџо sod bo¢
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- 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.Using your model of butane (CH3CH2CH2CH3) , complete the following graph of the anglebetween the two Me groups vs. potential energy. a. Label each Newman projection of butane on the graph with the words staggered, eclipsed, gauche, and anti, as appropriate. (Note that some structures will have more than one label.) b. Draw a wedge and dash bond representation of butane in its lowest P.E. conformation.4- Use Newman projections to represent the most stable conformer for the following molecules (remember to assign Gauche interactions). Br HN
- Finding strain energy confuseda) Draw all Newman projections of your molecule's conformations in which the CH3 group and the H of the CHY2 group are positioned 'ANTI' to each other. Be sure to put in the correct X and Y atoms, bonded to the correct C atoms, for your molecule. X = FY=I Conformations = 60 deg and - 180 deg 60 deg dihedral angle = - 179.987 deg 180 deg · - dihedral angle = 179.814 degHow would I find the strain energy of this ?
- 4. a) Calculate the units of unsaturation for the formula C6H10O2. b) Draw a structure of C6H1002 that has no formal charges and a) ester and ring b) carboxylic acid lotfasss.com 5. A student tried to draw the most stable conformation of the molecule shown below. What is wrong with the Newman projection that they drew? view OCH 3 H H H 6. A student tried to draw one of the chair conformations of the molecule shown below. What is wrong with the chair that they drew? H3C Student answer for most stable Newman Projection H3C. CH3 H OH TH H H H UU .H OCH 3 has: c) ketone and alcohol H 7. Which type(s) of strain are present in the following molecules? (steric, torsional, angle, etc) H H O H H H H H H2. 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 energyWrite a structure ( Chair conformation )
- 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.Q2. Which one of the following structures is the most stable conformation for 2-bromo butane (viewing down the C2-C3 bond axis where C2 is front carbon and C3 is back carbon) Br H H H **** CH, CH₂ (B) Br (A) H H (D)1: Draw the chain conformer of... 1a. Cyclohexane, label all the axial and equatorial hydrogens 1b. The most stable conformer of ethylcyclohexane 1c. The most sable conformer of trans-1-tert-butyl-3-methylcyclohexane