Editing Structural formula (section)

== Skeletal formulas ==
{{Main article|Skeletal formula}}

[[Skeletal formula]]s are the standard notation for more complex organic molecules. In this type of diagram, first used by the organic chemist [[Friedrich August Kekulé von Stradonitz]],<ref>{{Cite web|url=http://www.worldofchemicals.com/488/chemistry-articles/friedrich-august-kekule-von-stradonitz-principal-founder-of-chemical-structure.html|title=Friedrich August Kekule von Stradonitz –inventor of benzene structure - World Of Chemicals|website=www.worldofchemicals.com|access-date=2022-04-04}}</ref> the carbon atoms are implied to be located at the [[Vertex (geometry)|vertices]] (corners) and ends of line segments rather than being indicated with the atomic symbol C. Hydrogen atoms attached to carbon atoms are not indicated: each carbon atom is understood to be associated with enough hydrogen atoms to give the carbon atom four bonds. The presence of a positive or negative [[Electric charge|charge]] at a carbon atom takes the place of one of the implied hydrogen atoms. Hydrogen atoms attached to atoms other than carbon must be written explicitly. An additional feature of skeletal formulas is that by adding certain structures the [[stereochemistry]], that is the three-dimensional structure, of the compound can be determined. Often times, the skeletal formula can indicate stereochemistry through the use of wedges instead of lines. Solid wedges represent bonds pointing above the plane of the paper, whereas dashed wedges represent bonds pointing below the plane.

<gallery>Image:Isobutanol.svg|Skeletal formula of [[isobutanol]], (CH<sub>3</sub>)<sub>2</sub>CHCH<sub>2</sub>OH</gallery>