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HALOALKANES
These are simply alkanes that have one or more of the H replaced by a halogen (F, Cl, Br, I) that is often designated by the symbol X. e.g. CH3Cl or CH2ClBr or CHCl3 etc is written as CHnX.
Nomenclature
The names for haloalkanes are derived according to the rules that have previously been discussed for naming alkanes. The parent C chain is numbered in the direction that gives the substituent encountered first (regardless of whether it is a halogen or an alkyl group) the lowest number. Halogen substituents are denoted by the prefixes fluoro, bromo, chloro and iodo.
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