Chemistry - STEREO ISOMERISM Question with Solution | TestHub
For each pair compounds below, determine whether the pair are enantiomers or diastereomers.
(a) 
(b) 
(c) 
(d) 
(e) 
(f) 
Options:
Answer:
Solution:
(a) Enantiomers - both are cis-2-methylcyclohexan-1-ol; every stereocentre is inverted between the two structures, so they are non-superimposable mirror images.
(b) Diastereomers - the first is cis- and the second is trans-2-methylcyclohexan-1-ol; they differ at only one of the two stereocentres.
(c) Enantiomers - same connectivity (1,2,3,4,5-pentamethylcyclohexane) with every stereocentre inverted.
(d) Different compounds - the first is a tetramethylcyclohexane, the second a pentamethylcyclohexane (different connectivity).
(e) Different compounds - the first is a tetramethylcyclohexane, the second a pentamethylcyclohexane.
(f) Different compounds - the first is 2-methylpent-2-ene, the second is 2-fluoropent-2-ene.
Ans. (a) Enantiomers (b) Diastereomers (c) Enantiomers (d) Different compounds (e) Different compounds (f) Different compounds
