D-galactose turns polarized light, but its reduced product does not. Draw the two as Fischer projections...
D-galactose turns polarized light, but its reduced product does not. Draw the two as Fischer projections and explain.
Homework Answers
The reason behind is, D-galactose is optically active
but the reduced product is not. We know, a molecule is
optically active when it does not conatin any of - ,
,
.
In D-galactose, there is none of these, but from the Fischer
projection shown below, you can see the reduced product
contains
plane of
symmetry. So, it is unable to rotate plane polarized
light.
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D-galactose turns polarized light, but its reduced product does
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5. For the following set of Fischer projections answer each of the questions below by circling the appropriate letter(s) or letter combination(s). Hint: Redraw the Fischer projections with the longest carbon chain in the vertical direction and having similar atoms in the top and bottom portion. Classify all chiral centers in the first structure as R or S absolute configuration. (X pts) a. Which are optically active? b. Which are meso? c. Which is not an isomer with the others?...
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