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Chapter 24: Problem 27

Write structural formulas for the following organic compounds: (a) 3 -methylhexane, (b) 1,3,5 -trichlorocyclohexane, (c) 2,3 -dimethylpentane, (d) 2 -bromo4 -phenylpentane, (e) 3,4,5 -trimethyloctane.

Short Answer

Expert verified
The structural formulas would depict the distribution of atoms in the compounds, with methyl groups attached in the positions as indicated in the nomenclature of each compound. For instance, '2,3 -dimethylpentane' would have two methyl groups on the 2nd and 3rd carbon atom of the pentane chain.

Step by step solution

01

Drawing 3 -methylhexane

First, we know that hexane is a 6 carbon chain. '3-methyl' suggests that there is a methyl group attached at the third carbon. So, draw the hexane structure, and then attach the methyl group at the third carbon of the chain.
02

Drawing 1,3,5 -trichlorocyclohexane

Next, draw a cyclohexane which is a six-carbon ring. For this molecule, '1,3,5-trichloro' indicates that there are 3 chlorine atoms attached at position 1, 3 and 5. So, attach the chlorine groups at the position mentioned in its name.
03

Drawing 2,3 -dimethylpentane

Pentane is a five carbon chain molecule. '2,3-dimethyl' means that there are 2 methyl groups at positions 2 and 3. So, draw the pentane molecule and then add these methyl groups at the respective positions.
04

Drawing 2 -bromo4 -phenylpentane

Again, we start with a pentane molecule. There is a bromine atom at the 2nd carbon and a phenyl group at the 4th. Draw the pentane structure and attach bromine at the 2nd carbon and the phenyl group at the 4th carbon.
05

Drawing 3,4,5 -trimethyloctane

Octanes are eight carbon chain molecules. '3,4,5-trimethyl' indicates that there are methyl groups to be attached at the 3rd, 4th, and 5th positions of the chain. Draw the octane structure and attach these methyl groups accordingly.

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