Intro to Stereochemistry Quiz

What property can be assigned to a carbon atom that has four different atoms or structural groups attached to it?

• isomerity

• chirality

• chivalry

• geometry

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

• 1
• 2
• 3
• 4

Optcial isomers have:

• polarised light

• non-superimposable mirror images

• mirror images

• superimposable mirror images

Optical isomers

• reflect polarised light in opposite directions

• rotate polarised light in opposite directions

• reflect plane polarised light in opposite directions

• rotate plane polarised light in opposite directions

True or False: Chiral molecules give rise to stereocenters.

• True

• False

True or False: Enantiomers have symmetric carbon centers.

• True

• False

True or False: Enantiomers' center carbon is always sp2 hybridized.

• True

• False

Which molecule is achiral? Look at the images.

• Left Molecule

• Center Molecule

• Right Molecule

Define chiral centre

• also known as chiral carbon

• a type of enantiomer

• a carbon with four different groups or atoms attached to it

• optically active compounds

Can enantiomers rotate plane-polarised light?

• Yes in all situations

• No because it is optically active

• Yes but it can only rotate the polarised light in one direction

• No due to its restricted rotation of carbon-carbon double bond