Explain a non-reducing sugar found in honey has the molecular formula C18H32O16. Acidic hydrolysis gives 1 mole D-fuctose, 1 mole
D-galactose, and 1 mole D-glucose having the subsequent structural formulas:
D glucose- CHO-CHOH-COHH-CHOH-CHOH-CH2OH
D-galactose-CHO-CHOH-CHOH-CHOH-CHOH-CH2OH
D-fructose-CH2OH-C=O-CHOH-CHOH-CHOH-CH2OH
a) Compute the total number of stereoisomers possible for this trisaccharide
b) Depict Fisher projections for all D and L stereoisomers of fructose. Give an example of diasteromers
c) Utilizing ring structures (Haworth Projections) draw the structural formula for the trisaccharide.
d) 1. Name the glycosidic linkages in Part C
2. Give the complete name of a glucose ring used in part C
e) An optically active solution of D-glucose was allowable to stand for several days. Explain the solution showed no optical activity after standing.