Stereoisomers Knowledge-Based Download PDF

Questions

1. 1.

   Which of the following pairs of hydrocarbons represents a pair of diastereomers?

   • A) Hexane and 2-methylpentane
   • B) (3R)-3-methylheptane and (3S)-3-methylheptane
   • C) cis-pent-2-ene and trans-pent-2-ene
   • D) Cyclohexane and methylcyclopentane
2. 2.

   How many stereoisomers exist in total for the conjugated hydrocarbon hexa-2,4-diene?

   • A) 3
   • B) 4
   • C) 2
   • D) 6
3. 3.

   Which of the following hydrocarbons contains stereocenters but is an optically inactive meso compound?

   • A) trans-1,2-dimethylcyclobutane
   • B) trans-1,2-dimethylcyclopentane
   • C) cis-1,2-dimethylcyclopentane
   • D) trans-1,3-dimethylcyclopentane
4. 4.

   Which of the following branched alkanes possesses a chiral center and can therefore exist as a pair of enantiomers?

   • A) 2-methylpentane
   • B) 3-methylpentane
   • C) 2,4-dimethylpentane
   • D) 3-methylhexane
5. 5.

   Which of the following hydrocarbons can exist as a pair of cis-trans (geometric) stereoisomers?

   • A) Pent-2-ene
   • B) 2-Methylbut-2-ene
   • C) Pent-1-ene
   • D) 2-Methylpropene