To draw the structure of organic molecules, start by counting carbon atoms and determining hydrogen atoms based on carbon valency.
To depict bonds, join carbon atoms with lines; use double or triple lines for multiple bonds. When adding additional atoms, take stereochemistry into account for molecules having stereocenters. Observe the laws of organic chemistry and, if required, represent three dimensions using dash-wedge notation.
Practice sketching a variety of structures, such as functional groups, alkanes, alkenes, alkynes, and aromatic compounds. For more complex structures, software tools are available, and adhering to conventions guarantees accurate and comprehensible representation.