Question

$IUPAC$ name of the compound is ____________.

• A. $2-$methoxy$-2-$methylethane
• B. $2-$methoxypropane
• C. isopropylmethyl ether
• D. $1-$methoxy$-1-$methylethane

Answer 1

The correct option is B $2-$methoxypropane

$\text{IUPAC nomenclature of the given compound}$

Following are some important rules for naming ether:

1. The alkoxy group with shorter carbon chain is taken as substituent and the longest carbon chain is taken as parent chain.
2. While numbering, the carbon closest to oxygen is given more priority.
3. Ethers are named as "alkoxyalkane". Oxygen of ether is taken with the substituent (or with shorter chain) and forms a part of alkoxy group whereas alkane part is considered as the parent chain.

So, the correct $IUPAC$ name will be $2-methoxypropane$

$\text{Analysing the options}$

Option (A):

$1-methoxy-1-methylethane$ is not the correct $IUPAC$ name of the given compound because the parent chain is not the longest carbon chain.

Option (B):

$2-methoxy-2-methylethane$ is also not the correct $IUPAC$ name because in this the parent chain is not the longest carbon chain.

Option (C):

$2-methoxypropane$ is the correct $IUPAC$ name as discussed before.

Option (D):

$Isopropylmethylether$ is the common name of given compound.

So, the correct answer is option $\left(C\right)$.