ball & stick -+ labels a. How many chiral carbons are there in the molecule on the left? chiral carbon(s) b. What is the total number of stereoisomers in the group that includes the molecule on the left? stereoisomer(s) c. How many chiral carbons are there in the molecule on the right? chiral carbon(s) d. What is the total number of stereoisomers in the group that includes the molecule on the right? stereoisomer(s) e. Are the two molecules enantiomers? ✓ ball & stick labels ves Previous Ne: Sa

ball & stick -+ labels a. How many chiral carbons are there in the molecule on the left? chiral carbon(s) b. What is the total number of stereoisomers in the group that includes the molecule on the left? stereoisomer(s) c. How many chiral carbons are there in the molecule on the right? chiral carbon(s) d. What is the total number of stereoisomers in the group that includes the molecule on the right? stereoisomer(s) e. Are the two molecules enantiomers? ✓ ball & stick labels ves Previous Ne: Sa

Introduction to General, Organic and Biochemistry

11th Edition

ISBN:9781285869759

Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres

Publisher:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres

Chapter20: Carbohydrates

Section: Chapter Questions

Problem 20.58P

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Two nonsuperposable molecules are shown in the windows below: ball & stick + labels stereoisomer(s) e. Are the two molecules enantiomers? yes ball & stick a. How many chiral carbons are there in the molecule on the left? chiral carbon(s) b. What is the total number of stereoisomers in the group that includes the molecule on the left? no [References] stereoisomer(s) c. How many chiral carbons are there in the molecule on the right? chiral carbon(s) d. What is the total number of stereoisomers in the group that includes the molecule on the right? + labels Previous Next> Save and E
ball & stick + labels stereoisomer(s) e. Are the two molecules enantiomers? yes no ball & stick a. How many chiral carbons are there in the molecule on the left? chiral carbon(s) b. What is the total number of stereoisomers in the group that includes the molecule on the left? stereoisomer(s) c. How many chiral carbons are there in the molecule on the right? chiral carbon(s) d. What is the total number of stereoisomers in the group that includes the molecule on the right? + labels Previous Next Save and Exit
What are diastereomers? a. Constitutional isomers. b. Molecules with only one chiral center. c. Stereoisomers that are not mirror images of one another and are non-superimposable on one another. d. Stereoisomers that are mirror images of one another.
O b. SN2 O c. E 2 d. SN1 О е. Е1 Label the pair of stereoisomers in Question 20 as either enantiomers, diastereomers or identical. a. Diastereomers O b. Enantiomers O C. Identical US PAGE
a) Which structures are Enantiomers? b) Which structures are Diastereomers? c) Which structures are meso compounds? Use the letters only for your answers. А. В. H H CI H H Cl C. H H D. H Cl ČI Cl CI H
3. Consider the two following monosaccharides. -HO- но О он H H H H H он H OH Но H OH OH OH Draw the disaccharide that forms between the two in which the glycosidic bond is an a (1→4) linkage. The monosaccharide on the left should be the "left-most" structure you draw. oints) (2inlo0.25slussiom giwolot losee (ajnodis lsida o al
B4. CH₂OH H H но. H CH₂OH OH H AR Zeval O OH H H HO H O H OH OH H OH H OH H OH OH/ H H Lactose H OH НО. H OH H H Sucrose The structures of the disaccharides lactose and sucrose are shown above. a) Identify the monosaccharide residue that is common to both disaccharides. OH b) Identify and explain the diastereomeric relationship between two of the monosaccharide units in these sugars. c) Draw a simple mechanism for the lactase-catalyzed cleavage of the glycosidic bond in lactose. d) Explain why lactose and sucrose give different results in the Benedict's test.
5. Cholesterol is one of the important component of animal cell membrane. Label circled chiral centers as R/S, and circle the rest of chiral centers in this compound. b a H НО Cholesterol
H ÇI CH3-C-COOH он CH3-C-CH2Br 1. ČI a b 81. Consider the structures above. Which of these two contains a stereocenter? Draw thestructure on your answer sheet and mark the stereocenter with an asterisk. 82. Which of these two is a chiral molecule? Explain your answer. 83. Which of these two can exist as a pair of enantiomers? 84. Draw the pair of enantiomers using three-dimensional representation.
a) Which structures are Enantiomers? b) Which structures are Diastereomers? c) Which structures are meso compounds? Use the letters only for your answers. А. В. H H CI H H Cl C. H H D. H Cl ČI Cl CI H
00 Consider the pair of compounds shown below then select the word or phrase that best describes the relationship between them... H Me Me H. COH and Me H HO, Me OH O A. None of these are accurate. O B. They are diastereoisomers, but differ in their conformations. OC. They are identical, but differ in their conformations. O D. They are enantiomers, but differ in their conformations. O E. They are constitutional isomers that, by definition, differ in their conformations.
A Fischer projection of a monosaccharide is shown below: CH₂OH C=O H НО HO -OH H H CH₂OH a. Classify this monosaccharide (e.g., aldotriose) b. Does it have the D or L configuration? c. Which carbon and oxygen become bonded in the furanose ring form of this monosaccharide (e.g., C206, where 06 means the oxygen on carbon 6, or "not formed")? d. Which carbon and oxygen become bonded in the pyranose ring form of this monosaccharide e.g., C206 or "not formed"?