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CH3 CH3 CH3 go Br H Br rotate H- H. Br 180 H- in H. Br Br Br H- plane [ HELPFUL HINT ] ČH3 Build hand-held models of A and A B and relate them to the Fischer projections shown here. Same structure Not the same (Flipping the projection formula over sideways creates the projection CH3 formula for the H- Br enantiomer of A.) Br- H- CH3 Not the same (Flipping the projection formula over end for end creates the projection formula for the enantiomer of A.) Because Fischer projections must be used with such care, we introduce them now only so that you can understand Fischer projections when you see them in the context of other courses. Our emphasis for most of this book will be on the use of solid and dashed wedges to represent three-dimensional formulas (or chair conformational structures in the case of cyclohexane derivatives), except in Chapter 22 when we will use Fischer projec- tions again in our discussion of carbohydrates. If your instructor wishes to utilize Fischer projections further, you will be so advised. (a) Give the (R,S) designations for each chirality center in compound A and for compound B. (b) Write the Fischer projection formula for a compound C that is the diastereomer of A and B. (c) Would C be optically active? • PRACTICE PROBLEM 5.26

CH3 CH3 CH3 go Br H Br rotate H- H. Br 180 H- in H. Br Br Br H- plane [ HELPFUL HINT ] ČH3 Build hand-held models of A and A B and relate them to the Fischer projections shown here. Same structure Not the same (Flipping the projection formula over sideways creates the projection CH3 formula for the H- Br enantiomer of A.) Br- H- CH3 Not the same (Flipping the projection formula over end for end creates the projection formula for the enantiomer of A.) Because Fischer projections must be used with such care, we introduce them now only so that you can understand Fischer projections when you see them in the context of other courses. Our emphasis for most of this book will be on the use of solid and dashed wedges to represent three-dimensional formulas (or chair conformational structures in the case of cyclohexane derivatives), except in Chapter 22 when we will use Fischer projec- tions again in our discussion of carbohydrates. If your instructor wishes to utilize Fischer projections further, you will be so advised. (a) Give the (R,S) designations for each chirality center in compound A and for compound B. (b) Write the Fischer projection formula for a compound C that is the diastereomer of A and B. (c) Would C be optically active? • PRACTICE PROBLEM 5.26

Chemistry
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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just problem 5.26 please
CH3 ald CH3 CH3 Br H Br rotate H- Br 180° H- in H. Br Br Br H- plane [ HELPFUL HINT ] CH3 Build hand-held models of A and A B and relate them to the Fischer projections shown here. Same structure Not the same (Flipping the projection formula over sideways creates the projection CH3 formula for the H- Br enantiomer of A.) Br- H- Not the same (Flipping the projection formula over end for end creates the projection formula for the enantiomer of A.) Because Fischer projections must be used with such care, we introduce them now only so that you can understand Fischer projections when you see them in the context of other courses. Our emphasis for most of this book will be on the use of solid and dashed wedges to represent three-dimensional formulas (or chair conformational structures in the case of cyclohexane derivatives), except in Chapter 22 when we will use Fischer projec- tions again in our discussion of carbohydrates. If your instructor wishes to utilize Fischer projections further, you will be so advised. (a) Give the (R,S) designations for each chirality center in compound A and for compound B. (b) Write the Fischer projection formula for a compound C that is the diastereomer of A and B. (c) Would C be optically active? • PRACTICE PROBLEM 5.26
Transcribed Image Text:CH3 ald CH3 CH3 Br H Br rotate H- Br 180° H- in H. Br Br Br H- plane [ HELPFUL HINT ] CH3 Build hand-held models of A and A B and relate them to the Fischer projections shown here. Same structure Not the same (Flipping the projection formula over sideways creates the projection CH3 formula for the H- Br enantiomer of A.) Br- H- Not the same (Flipping the projection formula over end for end creates the projection formula for the enantiomer of A.) Because Fischer projections must be used with such care, we introduce them now only so that you can understand Fischer projections when you see them in the context of other courses. Our emphasis for most of this book will be on the use of solid and dashed wedges to represent three-dimensional formulas (or chair conformational structures in the case of cyclohexane derivatives), except in Chapter 22 when we will use Fischer projec- tions again in our discussion of carbohydrates. If your instructor wishes to utilize Fischer projections further, you will be so advised. (a) Give the (R,S) designations for each chirality center in compound A and for compound B. (b) Write the Fischer projection formula for a compound C that is the diastereomer of A and B. (c) Would C be optically active? • PRACTICE PROBLEM 5.26
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