Q1P-e - Organic Chemistry (Mcmurry)

Question

Give IUPAC names for the following alkyl halide (e):

Step-by-Step Solution

Answer

(e)The name of the compound (e) is 1-Chloro-3-Ethyl-4-iodopentane.

Step1: 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;

Step2: Nomenclature of alkyl halides

1. (e) The name of the compound is 1-Chloro-3-Ethyl-4-iodopentane.

As the chemical structure indicates, that the given alkyl halide has five carbon atoms in the parent chain, so it is termed as pentane.

It is having three substituents i.e. ethyl group, iodo group and chloro group, so they will be assigned position alphabetically.  

1. The chloro group is positioned first, then ethyl group and afer that comes iodo. Thus, the given compound is 1-Chloro-3-Ethyl-4-iodopentane

Nomenclature of compound (e)