1. Define the following terms. Cite an example for each using the Fischer/ Haworth projection formula: a. Aldohexose b. Reducing sugar c. Hemiacetal
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1. Define the following terms. Cite an example for each using the
Fischer/ Haworth projection formula:
a. Aldohexose
b. Reducing sugar
c. Hemiacetal
Step by step
Solved in 5 steps with 1 images
- (b) How many reducing and non reducing does O- a-D-glucopyranofil(l ➔2)BETA -D-fructofuranoside has? Explain with a hawthron projection(d) Use the diagram below to complete the cyclic alpha form of structure V (e) Circle the hemiacetal in cyclic alpha form of structure V. (f) Redraw the cyclic alpha form of structure V but replace the OH group on the anomericcarbon with a methoxy group. Is this modified monosaccharide a reducing sugar or anonreducing sugar?Draw the enantiomer and a diastereomer for the compound shown below, and label them as D and L sugars
- Rank the following according to the number of reducing groups in a 1% solution: maltose, sucrose, amylose, fructose, and glucose. Give reason for your ranking.3. Construct the Fischer, Haworth projection formulas and chair conformation (if applicable) of D- Tagatose. Also, write the systematic names for eachThe disaccharide α,β-trehalose differs from the α, β structure in Figure )by having an (α1→ β1) linkage. Draw its structure as a Haworth projection.
- Reaction 6.2 shows the initial reaction of D-glucose with Cu2+ through Nelson’s test: a) What type of reaction occurs? Recall a property of D-glucose which allows the reaction to occur. b) Identify the other product aside from Cu2O.Consider alanine a. How many chiral centers? b. How many stereoisomers? c. Draw the fischer projection for each stereoisomer and determine the absolute configuration for each chiral center.Draw a Fisher Projection of D-Glucose, Haworth Projection of α-D-Glucopyranose and a phosphate ester derivative of glucose.
- What is the corresponding energy difference expected between these two - D glucose? And what is interconversion between these isomeric sugars?What is the difference between Fehling A and Fehling B? Fehling’s test is used to detect sugar in the urine of people suffering from diabetes. Why do you think sugars can be detected in this way?(i) Acetylation of glucose with acetic anhydride gives glucose pentacetate. Write the structure of the pentacetate. (ii) Explain – Why glucose pentacetate does not react with hydroxylamine?