Question: (a) Draw the structure of (1E,4R)-1,4-dimethylcyclodecene. (b) Draw the enantiomer and name it, including its E,Z and R,S prefixes. (c) Draw two diastereomers and name them, including the E,Z and R,S prefixes.

When there are substituents around the double bond, E or Z configuration is assigned on the following basis:

• Z: High-priority substituents are on the same side of the C=C bond
• E: High-priority substituents are on different sides of the C=C bond

(a) The given compound is (1E,4R)-1,4-dimethylcyclodecene. Its structure is shown below:

(1E,4R)-1,4-dimethylcyclodecene

(b) Compounds with the same formula that are non-superimposable mirror images are termed enantiomers.

The enantiomers of the given compound are shown below:

(1E,4S)-1,4-dimethylcyclodec-1-ene

(c) Compounds having the same formula, that are neither superimposable nor mirror images are termed diastereomers.

The diastereomers of the given compound are shown below:

Diastereomers