Monohalomethane

The monohalomethanes are organic compounds in which a hydrogen atom in methane is replaced by a halogen. They belong to the haloalkanes or to the subgroup of halomethanes.

The four common members are fluoromethane, chloromethane, bromomethane and iodomethane.

Historical name for this group is methyl halides; it's still widely used. The compounds of this class are often described as CH3X or MeX (X - any halogen, Me - methyl group).

Related compounds
There are analogs with more than one hydrogen atom in methane is replaced by a halogen: Analogs with carbon atom replaced with a heavier group 14 element are also known:
 * Dihalomethane, CH2X2, two hydrogen atoms replaced
 * Trihalomethane, CHX3, three hydrogen atoms replaced
 * Tetrahalomethane, CX4, all four hydrogen atoms replaced
 * Monohalosilane, SiH3X (with silicon, related to silane)
 * Monohalogermane, GeH3X (with germanium, related to germane)
 * Monohalostannane, SnH3X (with tin, related to stannane)