Dihalomethane

The dihalomethanes are organic compounds in which two hydrogen atoms in methane are replaced by halogen atoms. They belong to the haloalkanes, specifically the subgroup of halomethanes, and contains ten members.

There are four members with only one kind of halogen atom: difluoromethane, dichloromethane, dibromomethane and diiodomethane.

Structural Formula
Name	Difluoromethane	Dichloromethane	Dibromomethane	Diiodomethane
Melting point	−136 °C[1]	−97 °C[2]	−52 °C[3]	6 °C[4]
Boiling point	−51,7 °C[1]	40 °C[2]	97 °C[3]	decomposes[4]
Space-filling model

There are six members with two kinds of halogen atoms:

• Bromochloromethane
• Bromofluoromethane
• Bromoiodomethane
• Chlorofluoromethane
• Chloroiodomethane
• Fluoroiodomethane