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- Label the following pairs as A) distereoisomers, B) enantiomers, C) conformers, or D) the same. b1 c1 d1 e1 a2 b2 c2 The structures above are labeled a1, a2, b1, b2 ...etc. Using these labels, indicate which compounds above would have an optical rotation ofa) draw the newman projectjon between C3-C4 bond for all of the structures over 360 degrees of rotation. start with highest energy of conformation b) starting at 0 degrees draw a qualitative torsional energy plot as a function of degree of rotation1) Are the molecules A and B... conformational isomers? Diastereomers? Enantiomers? Position isomers? Non-related? 2) What about the molecules B and C? 3) What about the molecules C and D?