CHEM 1031 Chirality

In order to be classified as chiral, a molecule must have:

• 3 different groups surrounding the carbon atom

• 4 different groups surrounding the carbon atom

• 0 different groups surrounding the carbon atom

• less than 4 different groups surrounding the carbon atom

Different compounds with the same molecular formula are known as:

• constitutional isomers

• stereoisomers

• Isomers

• isomeres

Molecules that differ in the way the atoms are connected to each other are known as:

• cis and trans molecules

• Constitutional isomers

• stereoisomers

• chiral molecules

These are an example of:

• stereoisomers

• non isomers

• ethanol

• different molecules

To superimpose a molecule and its mirror image you can perform any rotation but you

• make more bonds

• can break bonds

• cannot break bonds

• make a new molecule

A molecule is classified as tetrahedral, does this make it chiral?

• Always

• Never

• Only if it has a C=C

• Only if it has 4 different groups attached

CH2CH3, CH3, H, and Br are attached to a carbon making it

• an achiral center

• an isomer

• a stereoisomer

• a chiral center

CH2 and CH3 groups have more than one H atom bonded to the same C, so those C’s are _____ chirality centers.

• always

• never

• sometimes

• rarely

A C that is part of a _____ does not have four groups around it, so it is never a chirality center.

• single bond

• ring

• line structure

• multiple bond

Is C3 a chiral center

• yes

• yes and no

• no

• none of the above