# Structural Formula

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.