, the chemical properties of ethers and thioethers are somewhat similar. Nomenclature Thioethers are sometimes called sulfides, especially in the older literature and this term remains in use for the names of specific thioethers. The two organic substituents are indicated by the prefixes. (CH3)2S is called dimethylsulfide. Some thioethers are named by modifying the common name for the corresponding ether. For example, C6H5SCH3 is phenyl methyl sulfide, but is more commonly called thioanisole, si… (More on Thioether)