Isocyanide dichloride
Isocyanide dichlorides are organic compounds containing the RN=CCl2 functional group. Classically they are obtained by chlorination of isocyanides. Phenylcarbylamine chloride is a well-characterized example.
Preparation
Chlorination of organic isothiocyanates is also well established:Alkylisocyanates are chlorinated by phosphorus pentachloride:
Cyanogen chloride also chlorinates to give the isocyanide dichloride: