They represent structural forms that allow one to convey valuable stereochemical information by drawing 3d molecules as flat structures. Determining r and s configurations on fischer projections From time to time you may be asked to determine r/s on a fischer projection So how do you do that Fischer projections are just another way of drawing compounds contacting chirality centers They are used for drawing molecules containing multiple chirality centers with the main idea of not having to draw the wedge and dash lines for every single chiral center.
Fischer projections are a method of representing 3d molecules in a 2d format Represent bonds going away from you Represent bonds coming towards you Imagine standing in front of a molecule with arms stretched out. A fischer projection is an illustration used to draw a three dimensional molecule in a two dimensional configuration This is done by identifying chiral centers, determining stereochemistry, and drawing the corresponding flat molecule.
By convention, horizontal lines represent bonds projecting from the plane of the paper toward the viewer, and vertical lines represent bonds projecting away from the viewer. By following specific rules for drawing these projections, one can depict complex carbohydrates such as glucose and fructose in a way that conveys their structural information.
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