Fischer projections hashed-wedged line structures

A Fischer (Real Life 5-2) projection is a simphfied way of depicting tetrahedral carbon atoms and their substituents in two dimensions. With this method, the molecule is drawn in the form of a cross, the central carbon being at the point of intersection. The horizontal lines signify bonds directed toward the viewer the vertical lines are pointing away. Hashed-wedged line structures have to be arranged in this way to facilitate their conversion into Fischer projections. 

Conversion of the Hashed-Wedged Line Structures of 2-Bromobutane into Fischer Projections (of the Stereocenter)... 

Conversion of Hashed-Wedged Line Structures into Fischer Projections... 

Draw the hashed-wedged line structures corresponding to Fischer projections A and B, above. Is it possible to transform A into B by means of a rotation about a single bond If so, identify the bond and the degree of rotation required. Use models if necessary. 

Fischer Projection and Hashed-Wedged Line Structures for D-(-l-)-Glucose... 

A molecular model can help you see that the aU-ecUpsed form actually possesses a roughly circular shape, as illustrated by the scrolled rendition above (center picture). In the subsequent all-eclipsed hashed-wedged line structure, notice that the groups on the right of the carbon chain in the original Fischer projection now project upward (wedged bonds). From this conformer, we can reach the aU-staggered form by 180° rotations of C3 and C5. 

Amino acids may be depicted by either hashed-wedged line structures or by Fischer projections. 

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