Chapter 3: Q. 28 E (page 88)
Draw structures of the nine isomers of
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Chapter 3: Q. 28 E (page 88)
Draw structures of the nine isomers of
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Locate and identify the functional groups in the following molecules.

Draw the eight 5-carbon alkyl groups (pentyl isomers).
Increased substitution around a bond leads to increased strain. Take the four substituted butanes listed below, for example. For each compound, sight along the C2–C3 bond and draw Newman projections of the most stable and least stable conformations. Use the data in Table 3-5 to assign strain-energy values to each conformation. Which of the eight conformations is most strained? Which is least strained?
(a) 2-Methylbutane
(b) 2,2-Dimethylbutane
(c) 2,3-Dimethylbutane
(d) 2,2,3-Trimethylbutane
Which conformation of 1,2-dibromoethane would you expect to have the largest dipole moment? The dipole moment of 1,2-dibromoethane is . What does this tell you about the actual conformation of the molecule?
Question: Give the IUPAC name for the following hydrocarbon, and convert the drawing into a skeletal structure.

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