Which of the following describes a primary amine?

A primary amine is characterized by the presence of one carbon group attached to the nitrogen atom. In this structure, the nitrogen is bonded to one alkyl or aryl group and two hydrogen atoms. This specific arrangement differentiates primary amines from secondary and tertiary amines, where secondary amines have two carbon groups attached to the nitrogen and tertiary amines have three.

Understanding the structure of amines is crucial in organic chemistry as it plays a significant role in their chemical properties and reactivity. In primary amines, the nitrogen has a single carbon substituent, allowing for specific interactions, such as hydrogen bonding, which influences boiling points and solubility in water.