Q22E-b - Organic Chemistry (Mcmurry)

Question

Question: Name the following alkyl halides:

Step-by-Step Solution

Answer

        (b)The name of the compound (b) is 5-iodo-hex-2-ene.

Step 1: Alkyl Halides

Alkyl halides are also known as haloalkanes or halogenoalkanes. They contains one or more halogen substituents i.e. –Br, -Cl,-I,-F.

Step 2: Rules for nomenclature of Alkyl halides

IUPAC rules used for naming of Alkyl halides

• Select longest carbon chain, it is the parent chain;
• Longest chain must contain double or triple bond, if present;
• Number the alkyl or halo substituent carbon i.e. it should possess lowest number in the parent chain;
• Assign a number to each substituent;
• Write the name of substituent’s in alphabetical order while naming;

Step 3: Naming of given alkyl halide

• The longest chain i.e. parent chain is having six carbon atoms, so it is a hexane.
• A double bond and one iodo group is present.
• Double bond would be preffered and the numbering will be done from where the double bond gets lowest number.
• So, the name of the compound is 5-iodo-hex-2-ene.

                                                        5-iodo-hex-2-ene