Explain how to draw their structure?

Question

1. 2-methyl-3-pentyne
2. 3-methyl-1-pentyne
3. 5-methyl-2-pentyne
4. 4-methyl-2-pentyne
5. 3-methyl-2-hexane
6. 4-methyl-2-pentene

Answer 1

1. Start with a chain of five carbon atoms. Attach a methyl group (CH3) at the second carbon atom and a triple bond at the third carbon atom. The final structure should look like H3C-CH2-C≡C-CH2CH3.

2. Begin with a chain of five carbon atoms. Place a methyl group at the third carbon atom and a triple bond at the first carbon atom. The final structure should look like H3C-C≡C-CH2-CH2CH3.

3. Begin with a chain of six carbon atoms. Attach a methyl group at the fifth carbon atom and a triple bond at the second carbon atom. The final structure should look like H3C-CH(CH3)-C≡C-CH2CH3.

4. Start with a chain of five carbon atoms. Place a methyl group at the fourth carbon atom and a triple bond at the second carbon atom. The final structure should look like H3C-CH(CH3)-C≡C-CH3.

5. Begin with a chain of six carbon atoms. Place a methyl group at the third carbon atom. The final structure should look like H3C-CH2-CH(CH3)-CH2-CH3.

6. Begin with a chain of five carbon atoms. Place a methyl group at the fourth carbon atom and a double bond at the second carbon atom. The final structure should look like H3C-CH(CH3)-CH=CH-CH3.