Draw the structures of the following compounds. (Includes both new and old names.)
i. cyclopent-3-ene-1-thiol
j. dimethyl disulfide

Understanding how to draw the structures of organic compounds is fundamental in organic chemistry. This involves recognizing the arrangement of atoms, bonds, and functional groups within a molecule. For example, cyclopent-3-ene-1-thiol features a cyclopentene ring with a thiol (-SH) group, which must be accurately represented in its structure.

Organic nomenclature is the systematic method of naming organic chemical compounds. It follows specific rules set by the International Union of Pure and Applied Chemistry (IUPAC). For instance, the name 'dimethyl disulfide' indicates a compound with two methyl groups and two sulfur atoms, which is crucial for understanding its structure and properties.

Functional groups are specific groups of atoms within molecules that determine the chemical reactivity and properties of those molecules. In the case of cyclopent-3-ene-1-thiol, the thiol group (-SH) is a key functional group that influences its reactivity. Recognizing these groups is essential for predicting the behavior of organic compounds in chemical reactions.