Question

please answer question 5 based on the drawing probided of 2-methyl butane. please indicate whether it is dihedral or degrees rotation

o. chemistry homework

5. Draw an energy diagram on a separate sheet of graph paper, plotting the approximate conformer energies against dihedral angles OR degrees rotation. You will have to estimate the potential energies based on your drawings. Grading for energy diagram graphs: Use an entire page in your laboratory notebook-it is graph paper Graphs must have a title and axis labeled (ie-Rotation or dihedral). Good graphing procedures followed su as using the entire page for your diagram, and draw to scale. Structures must be drawn correctly on the graph.

Answer 1

on the above problem, we are gwen 2-methyl butane d the conformers are abready 'drawn and are correct. According to the abready drawn conformers it can be seen anat conformer 0, and are enactly same, if noticed carefully all the three include one ethyl Veclipsed with 'H, Cone methyl eclipsed with H and two eclipsed H. energies of conformer 0 = * = = Exclipsed Siimilarly conformer © ☺ and © are idenlical as it is staggered and all the conformers are sanie. energies of conformer = =9 - © - Estaggered. on the groups are eclipsed in 1,3 and 5, so the steric hindrance is high amoing eclipsed groups compared to staggered strudleves 3, 4 and 6. so stability & energy Energy of eclipsed Eeclipsed > Estaggred stability: staggered seclipsed So only two energy levels are there and between thero tung rest will be intermedicikl..

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