Editing Structural formula (section)

=== Fischer projection ===

The [[Fischer projection]] is mostly used for linear [[monosaccharides]]. At any given carbon center, vertical bond lines are equivalent to stereochemical hashed markings, directed away from the observer, while horizontal lines are equivalent to wedges, pointing toward the observer. The projection is unrealistic, as a saccharide would never adopt this multiply [[eclipsed]] conformation. Nonetheless, the Fischer projection is a simple way of depicting multiple sequential stereocenters that does not require or imply any knowledge of actual conformation. A Fischer projection will restrict a 3-D molecule to 2-D, and therefore, there are limitations to changing the configuration of the chiral centers. Fischer projections are used to determine the R and S configuration on a chiral carbon and it is done using the [[Cahn–Ingold–Prelog priority rules|Cahn Ingold Prelog rules]]. It is a convenient way to represent and distinguish between [[enantiomer]]s and [[diastereomer]]s.<ref name="Zhang 799" />
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Image:DGlucose Fischer.svg|[[Glucose|Fischer projection of <small>D</small>-Glucose]]
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