Organic Nomenclature

Which of the following can an alkane NOT be described as?

• Saturated

• Aliphatic

• Dehydrogenated

• Hydrocarbon

Answer explanation

By definition, alkanes are saturated, aliphatic hydrocarbons. If you're wondering, dehydrogenated means to remove two hydrogens. This would result in a double bond and would be called an alkene.

Name the molecule according to IUPAC nomenclature rules

• 4,4-dimethylpentane

• 4,4-dimethylbutane

• 2,2-dimethylpentane

• 2,2-dimethylbutane

Answer explanation

Don't forget to get the lowest total count for the substituents. 2 is smaller than 4 here.

Name the molecule according to IUPAC nomenclature rules

• 2,3,4-tetramethylpentane

• 2,2,3,4-tetramethylpentane

• 2,2-dimethyl-3-methyl-4-methylpentane

• 2,2,3,4-methylpentane

Answer explanation

There are 4 methyls so the name must include tetramethyl and mention where each methyl is.

Name the molecule according to IUPAC nomenclature rules

• 2,4-diethyl-3-methylheptane

• 3,6,7-trimethylnonane

• 3-methyl-2,4-diethylheptane

• 3,4,7-trimethylnonane

Answer explanation

Find the longest chain first. The longest chain is 9 carbons long for this molecule

Name the molecule according to IUPAC nomenclature rules

• 3,7-dimethyl-4-bromooctane

• 4-bromo-3,7-dimethylooctane

• 4-bromomethyl-3,7-dimethylooctane

• Lucius

Answer explanation

It's a rough one but I'll tell you what, ain't nobody named Lucius.

Which functional group does the following molecule NOT feature?

• amine

• ketone

• carboxylic acid

• aldehyde

Which of the following is NOT an alkane?

• C₄H₁₀

• C₁₂H₂₆

• C₉H₁₈

• C₁₅H₃₂

Answer explanation

All alkanes follow the formula CnH2n+2

How many carbons and unsaturations does this molecule feature?

• C = 3, unsaturations = 1

• C = 4, unsaturations = 1

• C = 2, unsaturations = 2

• C = 3, unsaturations = 2

How many unsaturations does this molecule feature?

• 1

• 2

• 3

• 4

Answer explanation

Every pi bond and ring counts as an unsaturation.

What's this?

• An alcohol

• An ether

• An ester

• I dunno, but my dad smells like it all of the time