1) a) For the following 4 carbohydrates, identify chiral carbons by putting a* near each one. b) For each ?, indicate D or L structures. c) describe the relationship by using the following words: A) enantiomers B) diastereomers C)Meso Four carbon sugars (aldotetroses) (1) (11) (II) (IV) HO -- H- -он но- -H H- HO- HO-H ČH2OH но- H- H- ČH2OH ČH,OH ČH2OH ?-Erythrose ? -Threose ?-Threose ? -Erythrose 1. (I) and (II)_ 2. (II) and (III). 3. (III) and (IV)_ 4. (I) and (IV).

1) a) For the following 4 carbohydrates, identify chiral carbons by putting a* near each one. b) For each ?, indicate D or L structures. c) describe the relationship by using the following words: A) enantiomers B) diastereomers C)Meso Four carbon sugars (aldotetroses) (1) (11) (II) (IV) HO -- H- -он но- -H H- HO- HO-H ČH2OH но- H- H- ČH2OH ČH,OH ČH2OH ?-Erythrose ? -Threose ?-Threose ? -Erythrose 1. (I) and (II)_ 2. (II) and (III). 3. (III) and (IV)_ 4. (I) and (IV).

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter12: Chirality

Section: Chapter Questions

Problem 15E

See similar textbooks

Similar questions

The following compound has two asymmetric centers and four stereoisomers. Two of these are d-erythrose and d-threose, which are naturally occurring sugars. The configuration of d-erythrose is (2R,3R), and the configuration of d-threose is (2S,3R). a. Which structure represents d-erythrose? b. Which represents d-threose?
a. What is the classification of the Arabinose in terms of combined no. of carbons and highest functional group present? b. Provide the Cahn-Ingold-Prelog (R.S) Configuration of all the Chiral C present in the structure given above. c. State a Function of arabinose.
Mark the TRUE option with respect to the following compounds: a) (I) is a disaccharide formed by two aldoses b) (I) and (II) are reducing sugars c) (II) does not exhibit mutarotation d) the conformation presented in (II) is less stable than that of its anomer e) (I) gives positive Fehling reaction, while (II) gives negative
There are three (3) vials labeled A, B, and C known to contain the following monosaccharides. All three samples reduce Tollens and Fehling. By oxidation with dilute HNO3 an optically active aldaric acid is obtained for sample A and the remaining two give products without optical activity. When the three samples were subjected to an alkaline medium, it was observed that, after a certain time, samples A and C reached the same value of the specific rotation [α]. Select the RIGHT alternative: (a) Sample A is Galactose. (b) Sample B is Alosa. (c) Samples A and C are not related to each other by an epimerization process. (d) Sample C is Talose. (e) Samples B and C are epimers.
An unknown reducing disaccharide is found to be unaffected by invertase enzymes. Treatment with an a@galactosidasecleaves the disaccharide to give one molecule of d-fructose and one molecule of d-galactose. When the disaccharideis treated with excess iodomethane and silver oxide and then hydrolyzed in dilute acid, the products are2,3,4,6-tetra-O-methylgalactose and 1,3,4-tri-O-methylfructose. Propose a structure for this disaccharide, and give itscomplete systematic name.
Some sugar substitutes are made from derivatives of sucrose. Sucralose™ is a sweetener found in soft drinks and low-calorie foods such as yogurt. The structure of Sucralose is shown in both 2D and 3D representations. How many chirality centers are present?
1. draw the most stable chair form of (1R,2R)-1-ethyl-2-methylcyclohexane 2. in the following chiral compound, the stereogenic center is denoted by C*. assign the priorities to the groups attached to C* using the Cahn-Ingold-Prelog system. please show your work (the image goes with question 2)
Explain the method to separate enantiomers ?
how many stereoisomers of the sugar are possible?
We’ve included N-acetylneuraminic acid in the section on amino sugars and described it as a ketose. We could also call it a deoxy sugar. Locate reasons for these classifications in the structural formula. Number the carbon atoms in the nine-carbon chain. What is the configuration (d or l) at the highest numbered chirality center?
(b) How many reducing and non reducing does O- a-D-glucopyranofil(l ➔2)BETA -D-fructofuranoside has? Explain with a hawthron projection
name the compund, and include the chilarty centers (R or S)?