Halogenoalkanes are also known as haloalkanes or alkyl halides. Halogenoalkanes are compounds in which one or more hydrogen atoms in an alkane have been replaced by halogen atoms (fluorine, chlorine, bromine or iodine).
Types of halogenoalkanes
Halogenoalkanes fall into different classes depending on how the halogen atom is positioned on the chain of carbon atoms.
In a primary (1°) halogenoalkane, the carbon which carries the halogen atom is only attached to one other alkyl group.
In a secondary (2°) halogenoalkane, the carbon with the halogen attached is joined directly to two other alkyl groups, which may be the same or different.
In a tertiary (3°) halogenoalkane, the carbon atom holding the halogen is attached directly to three alkyl groups, which may be any combination of same or different.