Organic Chemistry
8th Edition
ISBN: 9781337516402
Author: Brown
Publisher: Cengage
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Chapter 25.3, Problem AQ
Interpretation Introduction
Interpretation:
The stereochemical descriptions for mannose and fucose from the scheme has to be chosen.
Concept Introduction:
The stereochemical descriptors are D-form and L-form. In D-form, the
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How many stereoisomers are possible for
a. a ketoheptose? b. an aldoheptose? c. a ketotriose?
What are the stereochemical descriptors for mannose and fucose in the above scheme?
1. Both are d-sugars.
2. Both are l-sugars.
3. Mannose is d and fucose is l.
4. Mannose is l and fucose is d.
The following compound has two asymmetric centers and four stereoisomers. Two of these are d-erythrose and d-threose, which are naturally occurring sugars. The configuration of d-erythrose is (2R,3R), and the configuration of d-threose is (2S,3R).
a. Which structure represents d-erythrose? b. Which represents d-threose?
Chapter 25 Solutions
Organic Chemistry
Ch. 25.1 - Prob. 25.1PCh. 25.2 - Prob. 25.2PCh. 25.2 - Prob. 25.3PCh. 25.3 - Prob. 25.4PCh. 25.3 - Prob. 25.5PCh. 25.3 - Prob. AQCh. 25.3 - Prob. BQCh. 25.3 - Prob. CQCh. 25.3 - Prob. DQCh. 25.3 - How many stereoisomers would result from the...
Ch. 25.4 - Prob. 25.6PCh. 25 - Prob. 25.7PCh. 25 - Prob. 25.8PCh. 25 - Prob. 25.9PCh. 25 - Prob. 25.10PCh. 25 - Prob. 25.11PCh. 25 - Prob. 25.12PCh. 25 - Prob. 25.13PCh. 25 - Prob. 25.14PCh. 25 - Prob. 25.15PCh. 25 - Prob. 25.16PCh. 25 - Prob. 25.17PCh. 25 - Prob. 25.18PCh. 25 - Prob. 25.19PCh. 25 - Prob. 25.20PCh. 25 - Prob. 25.21PCh. 25 - Prob. 25.22PCh. 25 - Prob. 25.23PCh. 25 - Prob. 25.24PCh. 25 - Prob. 25.25PCh. 25 - Prob. 25.26PCh. 25 - Prob. 25.27PCh. 25 - Prob. 25.28PCh. 25 - Prob. 25.29PCh. 25 - Prob. 25.30PCh. 25 - Prob. 25.31PCh. 25 - Prob. 25.32PCh. 25 - Prob. 25.33PCh. 25 - Prob. 25.34PCh. 25 - In making candy or sugar syrups, sucrose is boiled...Ch. 25 - Prob. 25.36PCh. 25 - Prob. 25.37PCh. 25 - Prob. 25.38PCh. 25 - Prob. 25.39PCh. 25 - Prob. 25.40PCh. 25 - Prob. 25.41PCh. 25 - Prob. 25.42PCh. 25 - Prob. 25.43PCh. 25 - Digitalis is a preparation made from the dried...Ch. 25 - Prob. 25.45PCh. 25 - Prob. 25.46PCh. 25 - Prob. 25.47PCh. 25 - Prob. 25.48PCh. 25 - Prob. 25.49PCh. 25 - Prob. 25.50P
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- (d) Draw the structure of the expected product when monosaccharide C undergo mutarotation upon dissolving in water in the presence of Tollens reagent (AgNO3, NH.OH). OH O. OH OH OH monosaccharide C 4.3 Use the appropriate templates below to canvert the monosaccharide C ring in 4.2 into the most stable chair conformation. OR 3.arrow_forwardA mixture containing equimolar quantities of a pair of enantiomers is called a RACEMIC MIXTURE. A racemic mixture is represented as (2) or sometimes dl, e.g. (-)-glucose or dl- glucose. A racemic mixture is optically inactive. 4. How is the racemic mixture of alanine represented?arrow_forwardD-glucose and L-glucose would be expected to show differences in which of the followingp roperties? (Answer the items as dif erent or not different) a. Solubility in an achiral solvent b. Density c. Melting point d. Solubility in a chiral solvent e. Freezing point f. Reaction with ethanol (achiral compound) g. Reaction with (+)-lactic acid (chiral compound)arrow_forward
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- Provide suitable responses for questions (a) –(j).| 6 CH2OH 4 ОН OH OH 2.arrow_forward6:18 D-fructose Linear formarrow_forwardsugar is an epimer of D-mannose? only one chiral different a) D-galactose b) D-allose c) D-talose d) L-mannose This sugar is (use structures from 6) OH OH HO OH OH H a) a-(D)-mannopyranose b) ẞ-(D)-mannopyranose c) B-(D)-galactopyranose d) B-(D)-talopyranose d) a-(D)-allopyranosearrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
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