Question

Write the IUPAC name for the following compound-
${C_3}{H_8},{C_3}{H_6},{C_3}{H_4}$ ?

Answer 1

Alkanes, alkenes and alkynes are the hydrocarbons. The IUPAC name of alkanes can be written as the root word of base chain with a suffix of -ane. The IUPAC name of alkenes can be written as the root word of the base chain with a suffix of -ene. The IUPAC name of alkynes can be written as the root word of the base chain with a suffix of -yne.

Complete answer:
Organic compounds are of different types. Hydrocarbons are the compounds consisting of only carbon and hydrogen atoms. Alkanes, alkenes and alkynes are the hydrocarbons.
Alkanes are saturated compounds consisting of single bonded carbon atoms. The compound with the molecular formula ${C_3}{H_8}$ is ana alkane. The number of carbon atoms is three. Thus, the longest base chain has the root word of prop. As it is alkane the suffix must be -ane. Thus, the IUPAC name is propane.
Alkenes are unsaturated compounds consisting of double bonded carbon atoms. The compound with the molecular formula ${C_3}{H_6}$ is an alkene. The number of carbon atoms is three. Thus, the longest base chain has the root word of prop. As it is alkene the suffix must be -ene. Thus, the IUPAC name is propene.
Alkynes are unsaturated compounds consisting of triple bonded carbon atoms. The compound with the molecular formula ${C_3}{H_4}$ is an alkyne. The number of carbon atoms is three. Thus, the longest base chain has the root word of prop. As it is alkyne the suffix must be -yne. Thus, the IUPAC name is propyne.

Note:
The general molecular formula of alkanes is ${C_n}{H_{2n + 2}}$ , where n is the number of carbon atoms. The general molecular formula of alkanes is ${C_n}{H_{2n}}$ , where n is the number of carbon atoms. The general molecular formula of alkanes is ${C_n}{H_{2n - 2}}$ , where n is the number of carbon atoms.