What is the IUPAC name for the compound

1. a. ethoxymethylpropane
2. b. 1-ethoxy-2-methylpropane
3. c. ethyl isobutyl ether
4. d. no correct response

Interpretation:

The IUPAC name of given ether has to be chosen from the given options.

Concept Introduction:

Any organic molecule can be named by using certain rules given by IUPAC (International Union for Pure and applied chemistry).  IUPAC name consists of three parts in major namely Prefix suffix and root word.

Prefix represents the substituent present in the molecule and its position in the root name.

Suffix denotes the presence of functional group if any in the molecule.  It can be an alkene, alkyne, alcohol, carboxylic acid, alcohol etc.

Root word represents the longest continuous carbon skeleton of the organic molecule.

IUPAC rules for naming ether:

• ✓ The base name is found from the longest carbon chain present in ether.
• ✓ The suffix –yl has to be changed to –oxy in order to obtain the alkoxy group name.  For example, ethyl becomes as ethoxy, methyl becomes as methoxy etc.
• ✓ Alkoxy name has to be placed first with the number (carbon atom to which the alkoxy group is attached) followed by the base name.

Reason for correct option:

Given structure of ether is,

First step is to identify the longest carbon chain.  In this case it is a three carbon chain.  Hence, the parent alkane is propane.

The substituent present in the longest carbon chain is a methyl group at the second carbon atom.  Therefore, the base name is 2-methylpropane.

Next step is to identify the alkoxy group.  In the given ether, the alkoxy group is found to be ethoxy as it contains two carbon atoms.

Alkoxy name is placed before the base name with the appropriate number that gives information about to which carbon atom the alkoxy group is attached...