The structural formula of a compound is a diagram showing which atoms are connected to which (the connectivities). Several kinds of structural formulas are used to represent organic compounds in diagrammatic form – the list includes
- dot formulas (also known as Lewis structures)
- dash formulas
- condensed formulas
- combination (of dash and condensed) formulas
- bond-line formulas.
"A Structural Formula is a two dimensional structural representation that shows how the various atoms in a molecule are bonded to each other." Two types of Structural Formula are:
An Expanded Structural Formula is a structural formula that show all atoms in a molecule and all bonds connecting the atoms.
A Condense Structural Formula shows groupings of atoms in which central atoms and the atoms connected to them are written as a group to convey molecular structural information.