(a)
Interpretation:
For the four stereo isomeric aldotetroses, the pair of enantiomers and stereo descriptors is needed to be drawn.
Concept introduction:
- Aldoses are monosaccharides, which contains
Aldehyde group. - The naming of monosaccharides,
- Prefix: aldo or keto indicates whether the monosaccharide is containing aldehyde or
ketone group. - Suffix: ose indicates the carbohydrates
- Root word: indicate the number of carbons.
- Prefix: aldo or keto indicates whether the monosaccharide is containing aldehyde or
- The stereo-descriptor used for monosaccharides is D or L. it is based on the dextrorotatory glyceraldehyde or levorotatory glyceraldehyde.
The stereo-descriptor for other carbohydrates of having more than one chiral center will be evaluated by the location of –OH group (right or left) of farthest chiral carbon from the carbonyl group. Such as,
If the –OH group is located in right side then, the carbohydrate is a D-sugar.
If the –OH group is located in left side then, the carbohydrate is a L-sugar.
- Enantiomers are non-super imposable mirror images of each other.
To determine: the structures of pair of enantiomers of stereo isomeric aldotetroses.
(b)
Interpretation:
For the four stereo isomeric aldotetroses, the pair of enantiomers and stereo descriptors is needed to be drawn.
Concept introduction:
- Aldoses are monosaccharides, which contains Aldehyde group.
- The naming of monosaccharides,
- Prefix: aldo or keto indicates whether the monosaccharide is containing aldehyde or ketone group.
- Suffix: ose indicates the carbohydrates
- Root word: indicate the number of carbons.
- The stereo-descriptor used for monosaccharides is D or L. it is based on the dextrorotatory glyceraldehyde or levorotatory glyceraldehyde.
The stereo-descriptor for other carbohydrates of having more than one chiral center will be evaluated by the location of –OH group (right or left) of farthest chiral carbon from the carbonyl group. Such as,
If the –OH group is located in right side then, the carbohydrate is a D-sugar.
If the –OH group is located in left side then, the carbohydrate is a L-sugar.
- Enantiomers are non-super imposable mirror images of each other.
To identify: the D sugar and L sugar from the four structures of stereo isomeric aldotetroses.

Want to see the full answer?
Check out a sample textbook solution
Chapter 24 Solutions
ORGANIC CHEMISTRY (LL) W/ACCESS
- Can you explain step by step behind what the synthetic strategy would be?arrow_forwardPlease explain step by step in detail the reasoning behind this problem/approach/and answer. thank you!arrow_forward2. Predict the product(s) that forms and explain why it forms. Assume that any necessary catalytic acid is present. .OH HO H₂N OHarrow_forward
- consider the rate of the reaction below to be r. Whats the rate after each reaction? Br + NaCN CN + NaBr a. Double the concentration of alkyl bromide b. Halve the concentration of the electrophile & triple concentration of cyanide c. Halve the concentration of alkyl chloridearrow_forwardPredict the organic reactant that is involved in the reaction below, and draw the skeletal ("line") structures of the missing organic reactant. Please include all steps & drawings & explanations.arrow_forwardWhat are the missing reagents for the spots labeled 1 and 3? Please give a detailed explanation and include the drawings and show how the synthesis proceeds with the reagents.arrow_forward
- What is the organic molecule X of the following acetal hydrolysis? Please draw a skeletal line structure and include a detailed explanation and drawing of how the mechanism proceeds. Please include any relevant information that is needed to understand the process of acetal hydrolysis.arrow_forwardWhat are is the organic molecule X and product Y of the following acetal hydrolysis? Please draw a skeletal line structure and include a detailed explanation and drawing of how the mechanism proceeds. Please include any relevant information that is needed to understand the process of acetal hydrolysis.arrow_forwardAt 300 K, in the decomposition reaction of a reactant R into products, several measurements of the concentration of R over time have been made (see table). Without using graphs, calculate the order of the reaction. t/s [R]/(mol L-1) 0 0,5 171 0,16 720 0,05 1400 0,027arrow_forward
- Predict the organic products that form in the reaction below, and draw the skeletal ("line") structures of the missing organic products. Please include all steps & drawings & explanations.arrow_forwardWhat are the missing reagents for the spots labeled 1 and 3? Please give a detailed explanation and include the drawings and show how the synthesis proceeds with the reagents.arrow_forwardWhat are the products of the following acetal hydrolysis? Please draw a skeletal line structure and include a detailed explanation and drawing of how the mechanism proceeds. Please include any relevant information that is needed to understand the process of acetal hydrolysis.arrow_forward
- ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistryChemistryISBN:9781259911156Author:Raymond Chang Dr., Jason Overby ProfessorPublisher:McGraw-Hill EducationPrinciples of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning
- Organic ChemistryChemistryISBN:9780078021558Author:Janice Gorzynski Smith Dr.Publisher:McGraw-Hill EducationChemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage LearningElementary Principles of Chemical Processes, Bind...ChemistryISBN:9781118431221Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. BullardPublisher:WILEY





