page 9

Question 1

Analysis of Common Names of Alkyl Halides

Answer 1

Steps for Assigning a Common Name:

Identify the Alkyl Group:
Name all the carbon atoms as a single alkyl group (e.g., methyl, ethyl, tert-butyl).
The alkyl group includes all the carbons bonded to the carbon attached to the halogen.
Identify the Halogen:
Name the halogen attached to the alkyl group.
Replace the ending of the halogen’s name with -ide (e.g., chlorine → chloride, iodine → iodide).
Combine the Names:
Combine the alkyl group name and the halide name, separated by a space.
Example: tert-butyl iodide, ethyl chloride.

Question 2

examples of common names

Answer 2

Examples:

tert-butyl iodide:
Alkyl group: The halogen (I) is attached to a tert-butyl group.
Halogen name: Iodine becomes iodide.
Combined name: tert-butyl iodide.
ethyl chloride:
Alkyl group: The halogen (Cl) is attached to an ethyl group.
Halogen name: Chlorine becomes chloride.
Combined name: ethyl chloride.

Question 3

Question: What is the alkyl group in
CH3CH2 −Cl?

Answer 3

Answer: Ethyl group.

Question 4

What is the alkyl group in
(CH3)3C−I?

Answer 4

Answer: tert-Butyl group.

Question 5

How is the name of the halogen modified in common naming?

Answer 5

Answer: Replace the halogen’s name ending with -ide (e.g., chlorine → chloride, iodine → iodide).

Question 6

What is the halogen name in
CH3CH2−Br?

Answer 6

Answer: Bromide.

Question 7

Key Notes:

Answer 7

Common names are primarily used for simple alkyl halides.
For complex structures, IUPAC naming is preferred.