Concept explainers
(a)
Interpretation: All the staggered and eclipsed conformations of each given molecule that would result from the rotation around the highlighted bond are to be drawn.
Concept introduction: Conformational isomers are defined as the type of stereoisomers in which the rotation about single bonds forms different spatial arrangements of atoms. It is of two types, eclipsed conformation and staggered conformation.
In Newman projection, the carbon in front is represented by a point and in the back is represented by a circle.
(b)
Interpretation: The graphs of energy versus dihedral angle for rotation around the highlighted bond of each given molecule are to be drawn.
Concept introduction: Newman projection is a visual representation of a conformation. It describes three groups which are attached to each carbon atom in a particular
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Organic Chemistry (Looseleaf) - With Access
- (a) Using Newman projections, draw all staggered and eclipsed conformations that result from rotation around the bond highlighted in red in each molecule; (b) draw a graph of energy versus dihedral angle for rotation around this bond.arrow_forwardHow do you account for the difference in energies between the two staggered conformations of 1,2-dichloroethane? How about for the two eclipsed conformations? Draw all four conformations and, on your drawing, indicate sources of strain – torsional, steric (gauche), steric eclipsed.arrow_forwardRotate the back carbon to provide the structure with the least stable conformationarrow_forward
- Considering rotation around the bond highlighted in red in eachcompound, draw Newman projections for the most stable and leaststable conformations. (See Attached file)arrow_forwardWhich of the following conformers has the highest energy (the least stable)?Justify your choicearrow_forwardDraw a Newman projection for two more staggered conformations of this molecule. Which of your conformations is most stable? Assume that -OH and -CH3 are comparable in size.arrow_forward
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- Draw the Newman projection so that it corresponds to the molecule and conformation shown when viewed down the red bond in the direction of the arrow.arrow_forwardSee attachment and solve the following a.) Draw the three staggered and three eclipsed conformations that result from rotation around the bond labeled in red using Newman projections.b.) Label the most stable and least stable conformation.arrow_forwardCalculate the destabilization present in each eclipsed conformation. (See attachment)arrow_forward
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