Stereochemistry

What is the relationship between these two isomers?

• diastereoisomers

• same compound

• no relationship

• cis and trans

An asymmetric carbon is the same as a...

• achiral carbon

• chiral carbon

• prochiral carbon

• axial carbon

Label each Molecule as Chiral or Achiral

• Chiral, Achiral, Achiral, Chiral

• Chiral, Chiral, Achiral, Achiral

• Chiral, Achiral, Chiral, Achiral

• Achiral, Chiral, Chiral, Achiral

What is the Relationship between these Molecules?

• Same Molecule

• Diastereomers

• Enantiomers

• Constitutional Isomers

Enantiomers are

What is the relationship between the compounds?

• same compound

• enantiomers

• diastereomers

• conformational isomers

• constitutional isomers

Answer explanation

The compounds have the same formula and connectivity. The question is whether there is some 3D difference and if so, these are mirror images. You cannot slide one over the other and get the groups to superimpose, so they are not the same compound. If you turn one over left-right, you'll see they are mirror images. (or, recognize that the bold/dash groups on each chiral center are switched at each chiral center, so yes, mirror images)

Which of the following is an optically active compound?

• stereoisomer

• enantiomer

• mesomer

• diastereomer

Define the meaning chiral or stereogenic carbon.

• The molecule is a optically active compound.

• It has 4 different groups attached to it.

• It must have a chlorine atom attached to it.

• It is an alkene.

How many chiral center is found in C₂H₅CH(OH)CH₂OH?

• 1
• 2
• 3
• 4

Which of the following statement is FALSE about optical isomers?

• At least 1 asymmetrical chiral center
• Mirror images of each other
• Non superimposable
• carbon center bonded to 4 groups