Quiz on Stereoselectivity

What is stereoselectivity?

• Formation of racemic mixtures

• Formation of multiple products

• Preferential formation of one stereoisomer over another

• Formation of only one product

Which of the following is NOT a type of stereoisomer?

• Enantiomers

• Diastereoisomers

• Polymeric isomers

• Alkene isomers

What does enantioselectivity refer to?

• Formation of achiral products

• Formation of racemic mixtures

• Formation of enantiomers with preference

• Formation of diastereomers

What is the major product in an enantioselective reaction?

• One enantiomer in excess

• A racemic mixture

• An achiral compound

• Two diastereomers

Which reagent is used in the example of enantioselectivity involving pyruvic acid?

• Racemic mixture

• Non-chiral enzyme

• Chiral catalyst

• Achiral reagent

What is diastereoselectivity?

• Formation of one diastereoisomer as the major product

• Formation of only one enantiomer

• Formation of achiral products

• Formation of racemic products

In which reaction is diastereoselectivity observed?

• SN2 reaction

• E2 dehydrohalogenation

• Nucleophilic substitution

• Electrophilic addition

What is the preferred attack orientation of AlH4 in cyclohexanone?

• Equatorial

• Axial

• Random

• None of the above

What type of selectivity occurs when one face of a molecule is preferentially attacked?

• Optical selectivity

• Geometric selectivity

• Facial selectivity

• Stereospecificity

What is the relationship between homotopic groups?

• They give different compounds when replaced

• They give the same compound when replaced

• They are diastereomers

• They are always chiral