Hydrocarbons nomenclature

Hydrocarbons
Nomenclature

Hydrocarbons are classified as:

• Alkanes

• Alkenes

• Alkynes

Multiple Choice

Choose the alkane

Multiple Choice

Choose the alkene

Multiple Choice

Choose the alkyne

Naming linear hydrocarbons

Prefixes for carbon atoms

• Compounds with single bonds are alkanes: -ane

• Compounds with double bonds are alkenes: -ene

• Compounds with triple bonds are alkynes: -yne

Therefore a hydrocarbon with 2 carbons is:

• Alkane: ETHANE

• Alkene: ETHENE

• Alkyne: ETHYNE

Multiple Choice

What is the name of 4 carbons alkane?

• Butane

• Butyne

• Butene

Multiple Choice

What is the name of 11 carbons alkyne?

• Undecyne

• Undecane

• Undecene

Multiple Choice

What is the name of this compound?

• octane

• octane

• octyne

In nomenclature of unsaturated hydrocarbons (alkenes and alkynes) you must consider the position of bonds

• The main chain will be the one with double or triple bonds, highest number of carbon atoms and more branches.

• The numbering must start from the end closest to the double/triple bond.

Start numbering from the end nearer the double bond

• The locator for the bond is the lowest number.

• Alkenes or alkynes with two or three carbons do not need numbers.

• The name of this alkene is 2-heptene or hept-2-ene.

The name of this alkyne is ...

• 3-nonyne or non-3-yne.

Multiple Choice

Choose the name of the compound

• 3-butyne

• 2-butyne

• 3-butene

• 2-butene

Multiple Choice

Choose the name of the compound

• 1-propene

• 2-propene

• propane

• 2-propyne

Multiple Choice

Choose the name of the compound

• 4-octyne

• 5-octyne

• 4-octene

• 5-octene

Multiple Choice

Choose the name of the compound

• 2-pentyne

• 3-pentyne

• 2-pentene

• 3-pentene

You got this, nicely done!