CH2CH2SCH3

CH2CH2SCH3 is an organosulfur compound with the molecular formula C3H8S. It is commonly called methyl ethyl sulfide (MES) or ethyl methyl sulfide, a simple thioether in which sulfur is bonded to a methyl group and an ethyl group.

Structure and properties: The compound consists of a sulfur atom linked to two alkyl substituents, CH3 and CH2CH3. As a small thioether, it is typically a volatile, colorless liquid at room temperature with a characteristic sulfurous odor. It has low polarity and limited water solubility, and is more soluble in organic solvents.

Synthesis and reactions: MES is typically prepared by alkylation of a thiol with an alkyl halide, for example reacting methanethiol (CH3SH) with an ethyl halide or by other thioetherification methods. It can undergo standard sulfide-forming transformations and can serve as an intermediate in organic synthesis.

Applications and safety: Used as a solvent and synthetic intermediate in organic chemistry; it can also appear as an intermediate in flavor and fragrance contexts. It is flammable and has the odor characteristic of sulfur compounds; handle in a well-ventilated area with appropriate protective equipment to minimize inhalation exposure.

See also: related alkyl sulfides such as dimethyl sulfide and methyl propyl sulfide; related concepts include thioethers and sulfides.