Question

Draw the structure(s) of the cycloalkanes with molecular formula C₆H₁₂ that have a 5-membered ring.

Use the wedge/hash bond tools to indicate stereochemistry where it exists.
Do not draw wedged or hashed on rings with only one substituent.

Answer 1

The cycloalkanes in question are drawn as a pentagon representing a 5-membered cyclopentane ring with either a methyl or ethyl group attached as the substituent. No stereochemistry is indicated because there is only one substituent group in these molecules.

Step-by-step explanation:

The question involves drawing the structures of cycloalkanes with the molecular formula C6H12 that contain a 5-membered ring. Since a 5-membered ring has five carbons out of the six available, these cycloalkanes will also include one substituent group attached to the ring to account for the sixth carbon atom.

The 5-membered cycloalkane ring can be drawn as a pentagon, which is the common shorthand representation where each vertex represents a carbon atom. Based on the molecular formula and the requirement of having one substituent group, there will be two such structures:

• A cyclopentane with a methyl group (-CH3) attached to one of the carbon atoms in the cyclopentane ring.
• A cyclopentane with an ethyl group (-CH2CH3) attached to one of the carbon atoms in the cyclopentane ring.

Both structures are drawn with the 5-membered ring at the center and the substituent groups attached to one of the vertices. Since there is only one substituent, there is no need for wedge or hash bonds to indicate stereochemistry in these cases.