The saccharide shown here is present in some plant-derived foods. (a) Indicate the anomeric carbon atom(s) in this structure by drawing a circle around the atom(s) or by drawing an arrow pointing to the atom(s). (b) Would this saccharide give a positive result with Benedict’s reagent? Why or why not? (c) Would this saccharide give a positive result with Barfoed’s reagent? Why or why not? (d) Would this saccharide give a positive result with Seliwanoff’s reagent? Why or why not?
The saccharide shown here is present in some plant-derived foods.
(a) Indicate the anomeric carbon atom(s) in this structure by drawing a circle around the atom(s) or by drawing an arrow pointing to the atom(s).
(b) Would this saccharide give a positive result with Benedict’s reagent? Why or why not?
(c) Would this saccharide give a positive result with Barfoed’s reagent? Why or why not?
(d) Would this saccharide give a positive result with Seliwanoff’s reagent? Why or why not?
(e) In a separate set of experiments, the saccharide solution was treated with a reagent that breaks glycosidic bonds. After this treatment, would any of the three assays give different results? Be sure to indicate which assay results would be different and give a reason.
Step by step
Solved in 4 steps with 3 images
