Carbohydrates and Chiral Carbons

Classify each of the carbohydrates below by their carbon chain and functional groups.

• Aldotetrose

• Ketotetrose

• Ketohexose

• Aldohexose

Answer explanation

An aldotetrose is a four-carbon sugar with an aldehyde group. The correct classification for the given carbohydrate is Aldotetrose, as it fits the criteria of having four carbons and an aldehyde functional group.

Indicate the relationship (enantiomers/diastereomers/constitutional isomers) between each pair of compounds shown below.

• enantiomers

• diastereomers

• constitutional isomers

• identical compounds

Answer explanation

The compounds are enantiomers because they are non-superimposable mirror images of each other, differing at all chiral centers. This relationship is distinct from diastereomers and constitutional isomers.

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-3

Indicate the relationship (enantiomers/diastereomers/constitutional isomers) between each pair of compounds shown below.

• enantiomers

• diastereomers

• constitutional isomers

• identical compounds

Answer explanation

The compounds are diastereomers because they are stereoisomers that are not mirror images of each other. They have multiple chiral centers and differ in configuration at one or more of those centers, but not all.

Indicate the relationship (enantiomers/diastereomers/constitutional isomers) between each pair of compounds shown below.

• enantiomers

• diastereomers

• constitutional isomers

• identical compounds

Answer explanation

The compounds are enantiomers because they are non-superimposable mirror images of each other, differing at all chiral centers. This relationship is distinct from diastereomers and constitutional isomers.

Tags

NGSS.HS-PS1-3

Convert the following Fischer projections into the indicated Haworth Projections.

• Option A: Correct conversion

• Option B: Incorrect conversion

Answer explanation

Option A is the correct conversion as it accurately represents the stereochemistry and ring structure derived from the Fischer projection, maintaining the correct orientation of substituents in the Haworth format.

What is the difference between saturated and unsaturated fatty acids?

Name this structure

(a)  

Tags

NGSS.HS-PS1-2

Draw the following structure: N-butyl-N-propyl cyclohexylamine

What is the end product of this reaction?

Tags

NGSS.HS-PS1-6

What is the end product?