How many stereoisomers are possible for an aldopentose?

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 20.61P
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How many stereoisomers are possible for an aldopentose?

 
Which of the following (from Figure #22) is/are the product(s) obtained from the sodium
borohydride (NABH4) reduction of D-tagatose?
CH2OH
c=0
НО
-H-
Но
-H-
H
OH
CH2OH
D-tagatose
Figure #22
CH2OH
CH2OH
CH¿OH
HC=0
H-
OH
Но
H
OH
Но
H-
Но
Но
H
OH
Но
--
но
--
Но
Но
OH
H
OH
OH
CH2OH
CH2OH
CH2OH
CH2OH
structure A
structure B
structure C
structure D
Please click here if image does not display.
Both structure A and structure B are the products.
Structure B is the product.
Structure C is the product.
O Structure A is the product.
O Both structure C and structure D are the products.
Transcribed Image Text:Which of the following (from Figure #22) is/are the product(s) obtained from the sodium borohydride (NABH4) reduction of D-tagatose? CH2OH c=0 НО -H- Но -H- H OH CH2OH D-tagatose Figure #22 CH2OH CH2OH CH¿OH HC=0 H- OH Но H OH Но H- Но Но H OH Но -- но -- Но Но OH H OH OH CH2OH CH2OH CH2OH CH2OH structure A structure B structure C structure D Please click here if image does not display. Both structure A and structure B are the products. Structure B is the product. Structure C is the product. O Structure A is the product. O Both structure C and structure D are the products.
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