Question

multiple choice 2 points draw the appropriate structures and provide the iupac names for five isomers of c7h16.

Explanation:

Step1: Recall alkane isomer rules

Alkanes with formula \(C_nH_{2n + 2}\) can have constitutional isomers by changing the carbon - chain structure. For \(C_7H_{16}\), we can have straight - chain and branched - chain isomers.

Step2: Identify straight - chain isomer

The straight - chain isomer of \(C_7H_{16}\) is heptane, with all carbon atoms in a continuous chain.

Step3: Identify branched - chain isomers

For 2 - methylhexane, we have a 6 - carbon main chain with a methyl group (\(-CH_3\)) attached to the 2nd carbon. Similarly, for 3 - methylhexane, the methyl group is on the 3rd carbon of the 6 - carbon main chain. For 2,2 - dimethylpentane, the main chain has 5 carbons and two methyl groups are on the 2nd carbon. For 2,3 - dimethylpentane, the main chain has 5 carbons and there is a methyl group on the 2nd and 3rd carbon respectively.

Answer:

1. Structure and IUPAC name:

• Structure: A straight - chain of 7 carbon atoms (for n - heptane). IUPAC name: Heptane
• Structure: A 6 - carbon chain with a methyl group on the 2nd carbon (for 2 - methylhexane). IUPAC name: 2 - Methylhexane
• Structure: A 6 - carbon chain with a methyl group on the 3rd carbon (for 3 - methylhexane). IUPAC name: 3 - Methylhexane
• Structure: A 5 - carbon chain with two methyl groups on the 2nd carbon (for 2,2 - dimethylpentane). IUPAC name: 2,2 - Dimethylpentane
• Structure: A 5 - carbon chain with a methyl group on the 2nd and 3rd carbon (for 2,3 - dimethylpentane). IUPAC name: 2,3 - Dimethylpentane