Question

4.41 Sketch an energy diagram that shows a conformational analysis of 2,2-dimethylpropane. Does the shape of this energy diagram more closely resemble the shape of the energy diagram for ethane or for butane? 4.42 What are the relative energy levels of the three staggered conformations of 2,3-dimethylbutane when looking down the C2-C3 bond?

Answer 1

2,2 dimethylpropane CH₂ - er en CH₂ Conformations are H си chy Colz czu ecclipsed Staggered Energy congram : Energy the 60° pington Eccleped Strygered So this is sinnar to Ethanes Energy dragram 2,3 dimethyl butune 4c-c-c-ch . The 3 staggered Contornat 2 4 4 a res crez Col M 4 z ch can CH, A The scahre energy lends are and © are equivalent and are unstable than 6 so < =0