Organic Chemistry-Package(Custom)
4th Edition
ISBN: 9781259141089
Author: SMITH
Publisher: MCG
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Question
Chapter 28, Problem 28.21P
Interpretation Introduction
(a)
Interpretation: The given compound is to be classified as reducing or nonreducing sugar.
Concept introduction: A carbohydrate that contains hemiacetal is classified as reducing sugar whereas a carbohydrate which contains acetal is classified as nonreducing sugar. The reducing sugars are in equilibrium with an acyclic
Interpretation Introduction
(b)
Interpretation: The given compound is to be classified as reducing or nonreducing sugar.
Concept introduction: A carbohydrate that contains hemiacetal is classified as reducing sugar whereas a carbohydrate which contains acetal is classified as nonreducing sugar. The reducing sugars are in equilibrium with an acyclic aldehyde.
Interpretation Introduction
(c)
Interpretation: The given compound is to be classified as reducing or nonreducing sugar.
Concept introduction: A carbohydrate that contains hemiacetal is classified as reducing sugar whereas a carbohydrate which contains acetal is classified as nonreducing sugar. The reducing sugars are in equilibrium with an acyclic aldehyde.
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Which monosaccharide is a-glucose?
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SOURCE: GENERAL ORGANIC AND BIOLOGICAL CHEMISTRY BY SMITH 4TH EDITION
Report Table CHO.13: Results of Chemical Tests on Unknown Sample
Benedict's test: Blue solution
Choose...
A. reducing sugar not found
B. reducing sugar found
Fermentation test: Gas bubbles
Choose...
A. fermentation occured
B. fermentation did not occured
Seliwanoff's test: Red solution
Choose...
A. Aldose present
b. ketose present
c. neither
Iodine test: Colorless to brown solution
Choose...
a. amylose present
b. amylose not present
In your own words, describe the information you have gathered from each test about your unknown.
Which carbohydrate do you think your unknown is?
Explain your answer
A. glucose
b. fructose
c. sucrose
d. lactose
e. starch
d. cant not be determined
Chapter 28 Solutions
Organic Chemistry-Package(Custom)
Ch. 28 - Prob. 28.1PCh. 28 - Prob. 28.2PCh. 28 - Label each stereogenic center as R or S. a. b. c....Ch. 28 - Convert the ball-and-stick model to a Fischer...Ch. 28 - Prob. 28.5PCh. 28 - Prob. 28.6PCh. 28 - Prob. 28.7PCh. 28 - Prob. 28.8PCh. 28 - Prob. 28.9PCh. 28 - Prob. 28.10P
Ch. 28 - Prob. 28.11PCh. 28 - Prob. 28.12PCh. 28 - Prob. 28.13PCh. 28 - Prob. 28.14PCh. 28 - Prob. 28.15PCh. 28 - Prob. 28.16PCh. 28 - Draw a stepwise mechanism for the following...Ch. 28 - Prob. 28.18PCh. 28 - Prob. 28.19PCh. 28 - Prob. 28.20PCh. 28 - Prob. 28.21PCh. 28 - Draw the products formed when D-arabinose is...Ch. 28 - Prob. 28.23PCh. 28 - Prob. 28.24PCh. 28 - Prob. 28.25PCh. 28 - Prob. 28.26PCh. 28 - Prob. 28.27PCh. 28 - Prob. 28.28PCh. 28 - Prob. 28.29PCh. 28 - Prob. 28.30PCh. 28 - Prob. 28.31PCh. 28 - Prob. 28.32PCh. 28 - Prob. 28.33PCh. 28 - Prob. 28.34PCh. 28 - Problem-28.35
Draw the structures of the...Ch. 28 - Prob. 28.36PCh. 28 - 28.37 Convert each ball-and-stick model to a...Ch. 28 - Prob. 28.38PCh. 28 - Prob. 28.39PCh. 28 - Convert each compound to a Fischer projection and...Ch. 28 - Prob. 28.41PCh. 28 - Prob. 28.42PCh. 28 - Prob. 28.43PCh. 28 - Prob. 28.44PCh. 28 - Prob. 28.45PCh. 28 - Draw both pyranose anomers of each aldohexose...Ch. 28 - Prob. 28.47PCh. 28 - Prob. 28.48PCh. 28 - Prob. 28.49PCh. 28 - Prob. 28.50PCh. 28 - Prob. 28.51PCh. 28 - Prob. 28.52PCh. 28 - Prob. 28.53PCh. 28 - What products are formed when each compound is...Ch. 28 - Prob. 28.55PCh. 28 - Prob. 28.56PCh. 28 - Prob. 28.57PCh. 28 - Prob. 28.58PCh. 28 - 28.58 Draw a stepwise mechanism for the following...Ch. 28 - Prob. 28.60PCh. 28 - Prob. 28.61PCh. 28 - Prob. 28.62PCh. 28 - Prob. 28.63PCh. 28 - Prob. 28.64PCh. 28 - Prob. 28.65PCh. 28 - Prob. 28.66PCh. 28 - Prob. 28.67PCh. 28 - Prob. 28.68PCh. 28 - Prob. 28.69PCh. 28 - Prob. 28.70PCh. 28 - Prob. 28.71PCh. 28 - Prob. 28.72PCh. 28 - Prob. 28.73PCh. 28 - Prob. 28.74PCh. 28 - Prob. 28.75PCh. 28 - Prob. 28.76PCh. 28 - Prob. 28.77PCh. 28 - Draw a stepwise mechanism for the following...Ch. 28 - Prob. 28.79P
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- Fructose, present with glucose in honey, reacts with Benedicts reagent. Circle the structural features that enable fructose to react.arrow_forward1. Which sugars are reducing? Which sugars are non-reducing? a. Glucose: b. Fructose: c. Sucrose: d. Lactose: e. Sucrose hydrolysate: Starch hydrolysate: g. Cellulose hydrolysate: f. 2. What structural feature is responsible for the reducing property of carbohydrates?arrow_forwardWhich sugar will yield a single alditol upon reduction? A. Rhamnose B. Sorbose C. Xylulose D. Erythrulosearrow_forward
- Show the dehydration reaction of the following disaccharides and describe their functions, importance, sources and structures. a. Lactose b. Maltose C. sucrosearrow_forwardD-Arabinose can exist in both pyranose and furanose forms.a. Draw the a and ß anomers of D-arabinofuranose.b. Draw the a and ß anomers of D-arabinopyranosearrow_forwardWhich monosaccharide is a-glucose? CH,OH CH,OH CH,OH CH,OH H. OH O. H. H. OH OH H. H. H. H. OH H. OH OH H. OH H. H H. H. H. B C OD OB OC OAarrow_forward
- Classify attached pair of compounds as constitutional isomers or stereoisomers ?arrow_forward49. The following compound is a(n) нонно H,N-C-ċ-Ѭċ-ċ-OH H;NCH;CH;CH;CH; H A. monosaccharide B. monopeptide C. disaccharide D. dipeptide E. diglyceridearrow_forwardWhen pure a-D-glucose is dissolved in water, both a-D-glucose and B-D-glucose. are soon present. Explain why this is so.arrow_forward
- When a disaccharide forms, a / an Select one: O a. alkyl: to any carbon in either of the monosaccharides O b. amide: between an ammonium cation and both anomeric carbons O C. ester: to a straight-chain aldose d. ether: to an anomeric carbon O e. ketone: to both anomeric carbons Clear my choice linkage is created Previous pagearrow_forwardIdentify the monosaccharides. A. CH₂OH он OH OH O OH OH OH CH₂OH OH B-D-glucose OH B. D. OH OH ОН OH OH Ону OH OHarrow_forwardWhich structure of Erythrose is referred to by the given Fischer projection? A. L-Erythrose B. D-Erythrose но- -H HO H CH2OHarrow_forward
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