Q.6.28 - An Introduction to General, Organic, and Biological Chemistry

Question

Draw the condensed structural formula, or line-angle formula, if cyclic, for each of the following.

a. 1-methylcyclopentene

b. 1-bromo-3-hexyne

c. 3,4-dimethyl-1-pentene

d. 2-methyl-2-hexene

Step-by-Step Solution

Answer

a.

Step 1: Part (a) Given Information

The given compound is 1-methylcyclopentene.

Step 2: Part (a) Explanation

• Cycloalkene consists of carbon and hydrogen atoms that are present in a ring structure and it has one or more double bonds but is not aromatic.
• The given compound is 1-methylcyclopentene, the parent chain for this compound is cyclopentene which has a methyl substituent at the first carbon atom.
• The line angle formula for 1-methylcyclopentene  is given as follows:

Step 1: Part (b) Given information

The given compound is 1-bromo-3-hexyne.

Step 2: Part (b) Explanation

• An alkyne is a hydrocarbon that is composed of carbon and hydrogen atoms containing a triple bond between two carbon atoms.
• The given compound is 1-bromo-3-hexyne. . The parent chain in this compound is hexyne having a Bromo substituent at the first carbon atom.
• The condensed structural formula for 1-bromo-3-hexyne.  is given as follows:

Step 1: Part (c) Given information

The given compound is 3,4-dimethyl-1-pentene.

Step 2: Part (c) Explanation

• Alkene is a hydrocarbon that consists of carbon and hydrogen atoms, containing a triple bond between two carbon atoms.

• The given compound is 3,4-dimethyl-1-pentene. The compound has a parent chain that is pentene which is made up of five carbon atoms and a substituent i.e., methyl on the third and fourth carbon.
• The condensed structural formula of 3,4-dimethyl-1-pentene is given as follows:

Step 1: Part (d) Given information

The given compound is  2-methyl-2-hexene.

Step 1: Part (d) Explanation

• Alkene is a hydrocarbon that consists of carbon and hydrogen atoms, containing a triple bond between two carbon atoms.

• The given compound is 2-methyl-2-hexene. The compound has a parent chain that is hexene which is made up of five carbon atoms where the double bond is at the second carbon atom and a substituent i.e., methyl on the second carbon.
• The condensed structural formula of 2-methyl-2-hexene  is given as follows: