What is the Fischer structure of fructose?

Its molecular formula is C6H12O6 . It contains the keto group at C-2 and the six carbon atoms are arranged in a straight chain. The Fischer projection of the fructose can be converted into the cyclic structure. Like glucose, fructose has a cyclic structure.

What is the Fischer projection of glucose?

Fisher projections show sugars in their open chain form. In a Fischer projection, the carbon atoms of a sugar molecule are connected vertically by solid lines, while carbon-oxygen and carbon-hydrogen bonds are shown horizontally.

How do you tell enantiomers from Fischer projections?

To find the enantiomer of a molecule drawn as a Fischer projection, simply exchange the right and left horizontal bonds. To determine whether the molecule in Fischer projection is a meso compound, draw a horizontal line through the center of the molecule and determine whether the molecule is symmetric about that line.

What is Fischer projection with example?

Fischer projection, method of representing the three-dimensional structures of molecules on a page, devised by Emil Fischer. 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.

What are main features of Fischer projection?

The Fischer Projection consists of both horizontal and vertical lines, where the horizontal lines represent the atoms that are pointed toward the viewer while the vertical line represents atoms that are pointed away from the viewer.

What is Fischer projection example?

For example, by definition, in a Fischer projection, the penultimate carbon of D-sugars is depicted with hydrogen on the left and hydroxyl on the right. Likewise, the L sugars will be shown with hydrogen on the right and hydroxyl on the left.

Who proposed Fischer projection?

Emil Fischer
Fischer projection, method of representing the three-dimensional structures of molecules on a page, devised by Emil Fischer.

What is the purpose of Fischer projection?

Fischer projections are a convenient way to depict chiral molecules (see optical activity) and distinguish between pairs of enantiomers (see racemic mixture). They are most often used to depict isomers of the sugars.

Which is Haworth structure for aldopentose D-xylose?

The Fischer projection and the Haworth structure for the aldopentose D-xylose are given below. The Fischer projection and the Haworth structure for furanose ring form of the ketohexose D- sorbose are shown below. Note that in the cyclic hemiacetal form of this keto-sugar, the anomeric carbon is C-2, not C-1 as it was in the previous examples.

How are Fischer projections used to draw sugar?

Drawing Sugar Structures: Fischer Projections, Haworth Structures and Chair Conformers The acyclic structure of a sugar is commonly drawn as a Fischer projection. These structures make it easy to show the configuration at each stereogenic center in the molecule without using wedges and dashes.

How is furan prepared from ketopentose and aldopentose?

Furan is economically and commercially prepared from inexpensive starting materials aldopentose or ketopentose by acid-catalyzed dehydration that yielded α-ketoaldehyde as an intermediate, which intramolecularly cyclized to give furfural. Deformylation of furfural in the presence of copper in quinoline at 400°C furnished furan.

Where are the groups on the Fischer projection?

hemiacetal forms, any group on the right-hand side in the Fischer projection will be on the bottom face of the Haworth structure, while all of the groups on the left-hand side of the Fischer projection will be on the top face of the Haworth structure.