CBSE - XI Science - Chemistry - Organic Chemistry
what are Fischer projections?How will we draw these structures?
The Fischer Projection represents every stereocenter as a cross. The horizontal line represents bonds extending out of the plane of the page, whereas the vertical line represents bonds extending into the plane of the page.
- Because the "up" and "down" aspects of the bonds don't change, a Fischer projection may be rotated by 180 degrees without changing its meaning.
- A Fischer projection may not be rotated by 90 degrees. Such a rotation typically changes the configuration to the enantiomer.
- 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.
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