Question

Question: Give the IUPAC name for each sulfide.

a.

.

B.

Short answer

Answer

a. The name of this sulfide is ethylthiobutane.

b. The name of this sulfide is methylthio-2-methylcyclopentane.

Step-by-step solution

Step-by-Step Solution Step 1: Sulfides

A sulfur atom is connected to two alkyl groups in compounds designated as sulfides. The nomenclature of ethers is similar to that of sulfur.

IUPAC nomenclature of sulfides

The simpler alkyl group is named prior to the remaining alkyl group while naming sulfides. The S atom is designated as an alkyl thio substituent.

IUPAC nomenclature of sulfide in question a

a. The remaining alkyl group is named after the simpler alkyl group while naming the sulfides. This alkyl group is designated as an alkane possessing an alkyl thio substituent.

The remaining alkyl group is named after the simpler alkyl group while naming the sulfides. This alkyl group is designated as an alkane possessing an alkyl thio substituent.

The given structure contains two carbon atoms in the simpler alkyl group and will have the name ethyl. The remaining alkyl group comprises four carbon atoms and is named butane along with a thio substituent.

IUPAC nomenclature of sulfide a

Hence, the name of the compound is ethyl thiobutane.

b. The given structure comprises one carbon atom in the alkyl group and is named methyl. The remaining alkyl group contains five carbon atoms in the cyclic ring with methyl as the substituent.

IUPAC nomenclature of sulfide b

Hence, the name of the compound is methylthio-2-methylcyclopentane