4) L-Idopyranose (L-idose) is the C-5 epimer of D-glucose (meaning only one stereocenter is changed). Using the proper chair configuration, show the structure of L-idose
4) L-Idopyranose (L-idose) is the C-5 epimer of D-glucose (meaning only one stereocenter is changed). Using the proper c...
6). Draw the zig-zag structure of C-2 epimer and C-3 epimer of D-glucose. Draw one possible chair conformer of C-2 epimer.
6). Draw the zig-zag structure of C-2 epimer and C-3 epimer of D-glucose. Draw one possible chair conformer of C-2 epimer.
A D-Glucose B. D-Fructose C. L-Glyceraldehyde 5. What is an epimer? In the following structures indicate the two structures and the specific carbon atoms that are making them epimers. (4 marks) H =0 Н. 1 11 CON HO CHI H. 2 HOCH HC=ON HOSCH 3 H-C-OH CHOH CULOH CHOH
Draw the structure of lactose give Blucopyranose. (D-galactose is a C-4 epimer of D-glucose) is: B-D-galactopyranosyl-(1,4)-a-D-
Problem 4 (10 pts) D-allose is the C2-epimer of D-glucose. Draw the open form (Fischer Projection) structure of L-allose. Draw the structure of a-D-allopyranose Cellobiose is a disaccharide which contains two glucose units with a p(1-4) glycosidic linkage. Draw the structure of Cellobiose.
3. Use your textbook to determine the structure of D-Glucose and D-Idose. Are these molecules diastereomers or enatiomers. (Be sure to look up structures in books table of carbohydrates) Explain your choice. 4. Given a molecule of D-glucose and D-Fructose, how many membered ring will each monosaccharide form? Of the members (atoms) how many will be carbon and how many are oxygens for each? Finally, which oxygen is incorporated into the cyclic structure. 5. Show the oxidation (weak oxidizing agent)...
One difference between D-glucose and L-glucose is the open-chain form of L-glucose does not exist. it is not possible to make L-glucose. L-glucose has a 5-membered ring, and D-glucose has a 6-membered ring. O only D-glucose is found in disaccharides and polysaccharides. L-glucose cannot form a closed structure.
a. Braw an arrow pointing to the configurational carbon b. Put a box around the anomeric carbon. c. Put a triangle on any hemiacetal carbons. d. Circle any acetal carbons. но он Benzyl ß-D-arabinofuranoside 2. D-Galactose is the C(4) epimer of D-glucose a. Draw the Fischer projections of D-galactose and L-galactose. D-Galactose L-Galactose b. Draw a-D-galactofuranose. Be sure to clearly show the stereochemistry at each stereocenter. a-D-Galactofuranose c. Draw ß-D-galactopyranose in it's two possible chair conformations (draw one chair, then...
4. Consider the following Fischer Projection: CH, OH I 9 CH OH A Does this represent a monosaccharide, a disaccharide, a trisaccharide or something else? B Are any chiral carbons present? If so, circle each one. C Does this represent an aldose or a ketose? Explain your response and draw a box around the relevant functional group. D Give the molecular formula for this compound. E Is this compound classified as an L-isomer or a D- isomer? your response. Explain...
Name the following aldoses. (Include in the names the stereochemical designation D or L and, where appropriate, the configuration of the anomeric carbon, alpha or beta. This question is case-sensitive, so capitalize only the D or L.) ball & stick labels ball & stick labels The following model is that of an aldopentose: ball & stick - + labels Draw the alpha anomer of the sugar in its furanose form. • Use the wedge/hash bond tools to indicate stereochemistry where...
1.
Which of the following is an aldohexose?
2. Which of the following is a cetopentose?
3. Which of the following best describes the relationship
between D-glucose and D-fructose?
4. Which of the following is (are) L-alfohexose(s)?
5. Which of the following aldohexose(s) is (are)
dextrorotatory?
6. How many stereoisomers are possible for L-galactose? Draw
or look for its structure.
7. Which of the following conpounds is a pair of
enantiomers?
8. Draw the fisher projection for L-sedoheptulose and also...