Question

IUPAC name of ${\text{C}}{{\text{H}}_{\text{3}}}{\text{C}}{{\text{H}}_{\text{2}}}{\text{ - O - C}}{{\text{H}}_{\text{2}}}{\text{C}}{{\text{H}}_{\text{2}}}{\text{C}}{{\text{H}}_{\text{3}}}$
A) 1-propoxyethane
B) 1-ethoxypropane
C) 2-ethoxypropane
D) 2-propoxyethane

Answer 1

Aldehydes, ketones, acids, esters, anhydrides, acyl halides, ether, etc are functional groups present in the organic compounds. The presence of the functional group in the organic compounds decides the IUPAC name of the compound. Here, in the question the function group of the given compound is ether.

Complete step-by-step answer:
Here, in the question the compound given is ${\text{C}}{{\text{H}}_{\text{3}}}{\text{C}}{{\text{H}}_{\text{2}}}{\text{ - O - C}}{{\text{H}}_{\text{2}}}{\text{C}}{{\text{H}}_{\text{2}}}{\text{C}}{{\text{H}}_{\text{3}}}$ indicates oxygen atom is bonded to the two alkyl groups hence, the given compound is the ether.

The rules used for IUPAC naming the ethers are as follows:
1)The longest and complex substituent attached to the oxygen is identified and its name is taken as the root name for IUPAC naming of the given ether.
2)The smaller group is taken as the alkoxy substituent while naming.
3)Now, first write the name of the alkoxy substituent and then write the root name.

Here, use the rules given above to find out the IUPAC name of the given compound.
${\text{C}}{{\text{H}}_{\text{3}}}{\text{C}}{{\text{H}}_{\text{2}}}{\text{ - O - C}}{{\text{H}}_{\text{2}}}{\text{C}}{{\text{H}}_{\text{2}}}{\text{C}}{{\text{H}}_{\text{3}}}$
Here, two alkyl groups attached to oxygen atoms are ethyl and propyl groups. As propyl is the three-carbon chain group therefore it is taken as root and ethyl is the two-carbon chain group hence, taken as an alkoxy substituent.

Here, oxygen is attached to the first carbon of the propyl group; the name of the ether is 1-ethoxypropane.

Here, option(A) 1-propoxyethane is incorrect.
Now, option(B) 1-ethoxypropane is the correct answer to the given question.
Option(C)2-ethoxypropane is also an incorrect answer to the question.
Here, option(D)2-propoxyethane is incorrect.

Thus the correct answer is option ‘B’.

Note: Oxidizer is the component used to cause the burning or combustion of the fuel. Oxidizer has also been known as an oxidant or oxidizing agent which causes the oxidation of another substance and itself undergoes the reduction. In the redox reaction, the species which gains the electrons or whose oxidation number is decreasing acts as the oxidizing agent.