Nomenclature of Sulfur Compounds

1. Nomenclature of Mercaptans

a. Mercaptans can be named by naming the parent compound immediately followed by the word thiol. The –SH group can also be named as a substituent using the group name, sulfhydryl. Mercaptans can also be named by naming the carbon group as a separate word followed by the word mercaptan.

CH3–SH

methanethiol

sulfhydrylmethane

methyl mercaptan

· Try to name the following compounds using these conventions…

J

J

· Try to draw structures for the following compounds…

2-sulfhydrylbutane J

3-pentanethiol J

b. A common name that you should know is...

thiophenol

· Try to name this compound in two other ways…J

2. Nomenclature of Sulfides

a. Sulfides can be named most readily by naming each of the two carbon groups as a separate word followed by a space and the word sulfide.

CH3–CH2–S–CH3

ethyl methyl sulfide

· Try to name the following compounds…

  J

J

· Try to draw structures for the following compounds…

2-butyl 1-propyl sulfide J

ethyl phenyl sulfide J

b. A common name that you should know is...

thiophene… This compound is aromatic.

· Try to draw a structure for the following compound…

2-ethenylthiophene J

3. Nomenclature of Disulfides

Disulfides can be named most readily by naming each of the two carbon groups as a separate word followed by a space and the word disulfide.

CH3CH2-S-S-CH2CH2CH3

ethyl 1-propyl disulfide

 · Try to name the following compound…

  J

4. Nomenclature of Sulfoxides

Sulfoxides can be named most readily by naming each of the two carbon groups as a separate word followed by a space and the word sulfoxide.

ethyl methyl sulfoxide

  · Try to name the following compound…

J

5. Nomenclature of Sulfonic Acids

Sulfonic acids can be named most readily by naming the carbon group as a separate word followed by the words sulfonic acid.

phenyl sulfonic acid

· Try to draw a structure for the following compound…

4-decylphenylsulfonic acid J

Copyright © August 2000 by Richard C. Banks...all rights reserved.