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Organic chemistry is a sub-discipline of chemistry that is concerned with the study of the structure, properties, composition, reactions, and synthesis of organic compounds, which contain carbon in covalent bonding. The carbon atoms form the backbone of diverse structures and can create chains and rings, to which other elements such as hydrogen, oxygen, nitrogen, sulfur, and halogens may be attached.
Organic chemistry is vital because it is the basis for understanding the functions and interactions of organic molecules in biological systems and synthesizing compounds like pharmaceuticals and plastics. Many concepts in organic chemistry, like isomerism and functional groups, help chemists understand and manipulate molecules for specific purposes.

Drawing chemical structures is a fundamental skill in chemistry that allows chemists to represent molecules visually. This often involves sketching out the connections between atoms through bonds. Structural formulas can be depicted in various ways, including Lewis dot structures, line-bond (or skeletal) structures, and condensed formulas.
In a skeletal diagram, for instance, lines represent covalent bonds and vertices represent carbon atoms, which are usually not labeled. Non-carbon atoms are explicitly drawn and labeled. Understanding how to draw these structures is crucial for students to accurately communicate the composition and architecture of molecules.

Functional groups are specific groupings of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules. They are important because they largely define the behavior of the organic molecule in a chemical reaction. Common functional groups include hydroxyl (-OH), carbonyl (C=O), carboxyl (-COOH), amino (-NH2), and many others.
Each functional group behaves consistently in different chemical contexts, allowing for the prediction of a molecule's reactivity and properties. Recognizing these functional groups is key to understanding organic chemistry, as it allows one to infer about a vast range of molecules, despite the complexity or size of their structures.

Amines are a category of functional groups found in organic chemistry that contain a nitrogen atom with a lone pair and are characterized by the general formula of R3N, where R can be a hydrogen or hydrocarbon chain. Amines are classified as primary, secondary, or tertiary depending on the number of carbon-containing groups that are attached to the nitrogen atom.
For example, isopropylamine, a primary amine, has one alkyl group and two hydrogen atoms attached to the nitrogen. In contrast, triethylamine, a tertiary amine, has three alkyl groups attached to the nitrogen, with no hydrogen atoms directly connected to the nitrogen. Amines are important in organic chemistry due to their role in creating polymers, dyes, and pharmaceuticals, and also occur naturally in plants and animals.