Interpretation:
Relative energy diagram for conformational analysis of 1,2-dichloroethane should be drawn and needed to be label all staggered and eclipsed conformations with the corresponding Newman projection.
Concept introduction:
Conformational analysis is the study of energy verses different conformers. Conformers arise due to the free rotation of
Newman projection: Newman projection of molecule is one type of representations for the
The most and least energy occupied conformers are eclipsed and staggered, which are having a dihedral of ‘0’ and ‘60’ degree respectively.
Staggered conformation: conformation is said to be staggered when groups (attached to front and back carbons) are not aligned in the same axis.
Eclipsed conformation: conformation is said to be eclipsed when groups (attached to front and back carbons) are aligned in the same axis.
For eclipsed conformations, Torsional strain and steric interactions of atoms are the energizing factors.
For staggered conformations, anti-interactions and gauche interactions of atoms are the energizing factors.
To draw: relative energy diagram for conformational analysis of 1,2-dichloroethane with labeled eclipsed and staggered conformations in Newman projection.

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Chapter 4 Solutions
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