Monohalomethane

Structural formula
Name Fluoromethane
Methyl fluoride
Chloromethane
Methyl chloride
Bromomethane
Methyl bromide
Iodomethane
Methyl iodide
Melting point −137,8 °C −97,4 °C −93,7 °C −66 °C
Boiling point −78,4 °C −23,8 °C 4,0 °C 42 °C
Space-filling model

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).