Question

(a) Give the IUPAC name for the following organic compounds: 

 

Hint:

When numbering the carbon chain, always give the functional group (like the -OH or the double bond) the lowest possible number!

Answer 1

1. Propan-1-ol: The longest chain contains 3 carbon atoms (propane). The functional group is an alcohol (-OH), which gets the suffix "-ol". Since it is attached to the first carbon, it is propan-1-ol.

2. But-1-ene: The parent chain has 4 carbon atoms (but-). The presence of a double bond indicates an alkene (suffix "-ene"). The double bond starts at the first carbon, hence but-1-ene.