Complete the following sentences regarding the partial Fischer projection show in the image below. Match the words in the left column to the appropriate blanks in the sentences on the right. Make certain each sentence is complete before submitting your answer. H NH₂ OH Position "1" will be occupied by 2. Position "2" will be occupied by 3. Position "3" will be occupied by OH ok-$ NH₂ 4. Position "4" will be occupied by Reset Help 1- 3 CH3 Ph -2 -4

Complete the following sentences regarding the partial Fischer projection show in the image below. Match the words in the left column to the appropriate blanks in the sentences on the right. Make certain each sentence is complete before submitting your answer. H NH₂ OH Position "1" will be occupied by 2. Position "2" will be occupied by 3. Position "3" will be occupied by OH ok-$ NH₂ 4. Position "4" will be occupied by Reset Help 1- 3 CH3 Ph -2 -4

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter22: Organic And Biological Molecules

Section: Chapter Questions

Problem 176MP

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ITEM #5 (Everyone should look at this question). Consider the two Fischer projections shown at right. They CH CH are NOT of the same molecule. H- -HO- HO In a short paragraph, explain why the molecules shown are NOT the same. OH но- H. HO. но In your explanation, describe how the groups of a Fischer projection are positioned in the ACTUAL molecule (Are the molecules flat in real life, or three-dimensional in real life? If three-dimensional, where exactly are the Hs and OHs positioned when one interprets these projections?) H- HO но H- CH,OH ČH;OH Also in your explanation, describe why the second molecule is not simply the first molecule flipped over (like a pancake).
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.
Consider the two Fischer projections shown . They are NOT of the same molecule. Explain why the molecules shown are NOT the same? Describe how the groups of a Fischer projection are positioned in the ACTUAL molecule (Are the molecules flat in real life, or three-dimensional in real life? If three-dimensional, where exactly are the Hs and OHs positioned when one interprets these projections? Describe why the second molecule is not simply the first molecule flipped over (like a pancake).
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.
Answer all the questions below! Based on the Fischer projection of the monosaccharide below, turn this linear monosaccharide into its Beta- furanose structure. And answer the following questions. 1. How many members of the ring are there? (Example 3 member? 4 member? 5 member? 6 member?) 2. What is the direction of the OH on carbon #4? (up or down) 3. What is the direction of the OH on carbon #3? (up or down) 4. What is this molecule in relation to D-Fructose? 5. What is this molecule in relation to D-glucose? 6. Will this make a hemiacetal or an acetal? CH₂OH H- I II -OH -ОН H- -ОН CH₂OH H
Tasks Demonstrate the usefulness of Fischer projections by showing how it is easy to determine isomeric relationship between two structures. 1. Convert both isomers in Figure 8 to Fischer projections. 2. Identify the stereoisomeric relationship between the isomers. Briefly explain the process. ОН CI Br „Br "CI HO, isomer A isomer B Figure 8: Isomers
Raffinose, with the structure below, is a trisaccharide commonly found in peas, beans, and some other vegetables. Identify all anomeric carbons. CH2OH ОН ОН Cs C4 ОН CH2 ОН C7. C10 ОН ОН CH,OH ОН C14 C13 CH2OH ОН
QUESTION 10 Use the Fischer projection shown below to answer questions 10-12. CH3 H-CA-OH Cl-CB-CH3 H-Cc-CI H. How many stereocenters are found in this molecule? O A. None O B. 3 O C.2 O D.1
8. The Fischer projection formula for D-mannose, a hexose sugar, is shown below. How many chiral centers are in D-mannose, please circle each Chiral C? HO- HO- H H CHO -H H -OH -OH CH₂OH Number of Chiral Centers and circle each in the structure: Study Guide Practice Questions 9. Draw the structure for 2-chloro-4-methylhexanal 10. What is the IUPAC name of the compound shown below? CH3 CH₂-C CH₂CH₂CH₂CHCH₂
Glucose is the most abundant monosaccharide. In energy metabolism it is the most important source of energy for most organisms. Most carbohydrates have several chiral centers. How many chiral centers are present in the straight chain form of glucose? H- ОН НО H- ОН ОН CH,OH
2. Give a systematic name for Gentiobiose, a rare disaccharide found in Saffron, which has the structure shown below. HOH2C НО НО. CH2 OH HỌ Но OH OH
Please refer to the monosaccharides below when answering questions (a) – (1). CHO CHO СНО CHO CHO Но- Но H- НО H- H- HO- H- Но H- H- -ОН НО- ОН НО H- H- HO- Но H- OH HO- НО H- H- ОН но H- Но H- но- H- HO. CH2OH ČH2OH CH2OH ČH2OH CH2OH I II III IV V (a) Structures and are enantiomers. (b) Structures and are a pair of epimers. (c) Structures and are another pair of epimers.