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	Dibromoethane	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

Reference

^ ^a ^b Record of Difluormethan in the GESTIS Substance Database of the Institute for Occupational Safety and Health, accessed on 2020-02-29.
^ ^a ^b Record of Dichlormethan in the GESTIS Substance Database of the Institute for Occupational Safety and Health, accessed on 2020-02-29.
^ ^a ^b Record of Dibrommethan in the GESTIS Substance Database of the Institute for Occupational Safety and Health, accessed on 2020-02-29.
^ ^a ^b Record of Methyleniodid in the GESTIS Substance Database of the Institute for Occupational Safety and Health, accessed on 2020-02-29.

See also

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CH₄

Monosubstituted

CH₃F
CH₃Cl
CH₃Br
CH₃I
CH₃At

Disubstituted

CH₂F₂
CH₂ClF
CH₂BrF
CH₂FI
CH₂Cl₂
CH₂BrCl
CH₂ClI
CH₂Br₂
CH₂BrI
CH₂I₂

CHF₃
CHClF₂
CHBrF₂
CHF₂I
CHCl₂F
C*HBrClF
C*HClFI
CHBr₂F
C*HBrFI
CHFI₂
CHCl₃
CHBrCl₂
CHCl₂I
CHBr₂Cl
C*HBrClI
CHClI₂
CHBr₃
CHBr₂I
CHBrI₂
CHI₃

Tetrasubstituted

* Chiral compound.

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