Concept explainers
(a)
Interpretation:
The Fischer projection for the structure of galacturonic acid is to be drawn.
Concept introduction:
Carbohydrates are a class of organic compounds. They can be present in the form of open chains or rings they are usually an
The six-membered ring form of carbohydrates is termed as pyranose. The five-membered ring form of carbohydrates is termed as furanose.
(b)
Interpretation:
The Fischer projection for the structure of ribitol is to be stated.
Concept introduction:
Carbohydrates are a class of organic compounds. They can be present in the form of open chains or rings.
They are usually an aldehyde or ketone with additional hydroxyl groups. They have the general molecular formula,
The six membered ring form of carbohydrates is termed as pyranose. This ring contains
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Organic Chemistry
- An important technique for establishing relative configurations among isomeric aldoses and ketoses is to convert both terminal carbon atoms to the same functional group. This can be done either by selective oxidation or reduction. As a specific example, nitric acid oxidation of d-erythrose gives meso-tartaric acid . Similar oxidation of d-threose gives (2S,3S)-tartaric acid. Given this information and the fact that d-erythrose and d-threose are diastereomers, draw Fischer projections for d-erythrose and d-threose. Check your answers against Table 25.1.arrow_forwardUsing the qualitative tests given, how one can glycine can be differentiatedfrom aniline?arrow_forwardIs there a reducing sugar present in digitoxin / digoxin? Why or why not?arrow_forward
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