
Interpretation:
Energy diagram for different conformations of 2,2-dimethylpropane should be sketched and check the resemblance with the energy diagram for ethane and butane.
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.
In ethane all the atoms attached to a carbon atom is same, so the energy levels of different eclipsed conformers and staggered conformers are degenerated.
In butane different atoms are attached to a carbon atom, so the energy levels of eclipsed conformers and staggered conformers are not degenerated.
To find: the energy diagram for conformational analysis of 2,2-dimethylpropane is resemble with the energy diagram for ethane or butane conformations.

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Chapter 4 Solutions
Organic Chemistry, Third Edition Binder Ready Version
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