Naming Alkyl Halides Step 3 If the parent chain can be properly numbered from either end by step 2,begin at the end nearer the substituent that has alphabetical precedence CI BrCH2CH2CHCHCH3 1234|5 CH3 1-Bromo-3-chloro-4-methylpentane Step 3 If the parent chain can be properly numbered from either end by step 2, begin at the end nearer the substituent that has alphabetical precedence Naming Alkyl Halides