Naming Halogenoalkanes

Halogenoalkanes are named using a prefix for the halogen: fluoro-, chloro-, bromo- or iodo-, added to the name of the parent alkane.A number shows which carbon the halogen is on. The chain is numbered to give the lowest numbers. For example, CH₃CH₂CH₂Br is 1-bromopropane and CH₃CHBrCH₃ is 2-bromopropane.If there is more than one of the same halogen, di-, tri- or tetra- is used, as in 1,2-dichloroethane, CH₂ClCH₂Cl.Halogens and alkyl side chains are listed in alphabetical order. For example, CH₂ClCH(CH₃)CH₃ is 1-chloro-2-methylpropane.Halogenoalkanes are also classed as primary, secondary or tertiary depending on how many carbon atoms are joined to the carbon bonded to the halogen: one, two or three.