— Physical Chemistry Chemistry Question
Cyclobutanes
Draw all possible isomers of substituted cyclobutanes with the molecular formula C7H14, including enantiomers.
Model Answer
The structures of all possible isomers of substituted cyclobutanes with the molecular formula C7H14, including enantiomers, are shown below:
[VISUAL]
Mark all the asymmetric carbon atoms in the molecules from question 20.1 with an asterisk.
Model Answer
The asymmetric carbon atoms are marked with asterisks on the structures of the isomers (note that two carbon atoms marked with a double asterisk are pseudo-asymmetric):
[VISUAL]
List all the compounds from question 20.1 that do not show optical activity.
Model Answer
The compounds that do not show optical activity (achiral compounds, including meso forms) are shown below:
[VISUAL]
List all pairs of enantiomers from question 20.1.
Model Answer
The pairs of enantiomers are shown below (labeled A, B, C, and D):
[VISUAL]