Q: Threose is an aldose monosaccharide. The Fischer projection of D-threose is shown.
A: representation of molecules : Different types of projection formulae I)wedge&dash 2)Fischer 3)…
Q: An aldohexose would have the functional group A. See first image B. See second image C. -CH3 D.…
A: Functional group is a molecule or group of atoms that have its own characteristic property…
Q: Trehalose and maltose are both dimers of glucose. However, they have considereably different…
A: Both Trehalose and maltose are dimers that are made of two glucose. In Maltose, two glucose units…
Q: What aldoses are formed when the following aldoses are subjected to the Kiliani-Fischer synthesis:…
A: a) D-threose = The aldose synthesised by Killiani-Fischer synthesis from the given aldose is, Here,…
Q: Another hexose gives the same aldaric acid on oxidation as does d-glucose. Which one?
A:
Q: What aldoses are formed when the following aldoses are subjected to the Kiliani–Fischer synthesis:…
A: Kiliani-Fischer synthesis is a method which is used for the elongation of the carbon chains in…
Q: a. How many stereogenic centers are present in α-D-galactose? b. Label the hemiacetal carbon in…
A: Hey, since there are multiple sub-part questions posted, we will answer first three questions. If…
Q: Which of the d-aldopentoses will give optically active aldaric acids on oxidation with HNO3 ?(
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Q: There are three (3) vials labeled A, B, and C known to contain the following monosaccharides. All…
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Q: is Gulose is a c4 epimer of galactose? What should be their relationship?
A: Given, Gulose is a c4 epimer of galactose
Q: Draw the mechanism for the formation of b-lactose from α-d-galactose and β-d-glucose in dilute HCl.
A:
Q: How many stereoisomers are possible for an aldopentose?
A: We know NaBH4 is a reducing reagent it can reduce -aldehyde to alcohol. But since H- can attack from…
Q: Arrange the following sugars according to their DECREASING reactivity with Benedict’s reagent.…
A: The solution used to detect simple carbohydrates like glucose in Benedict's test is known as…
Q: Name an aldohexose other than d-glucose that is oxidized to d-glucaric acid by nitric acid.
A: The d-glucose when react with nitric acid undergo oxidation to form d-glutaric acid also known as…
Q: Given the following structure of aldose, (a) how many chiral carbons are there? (b) is it a reducing…
A: We will use this structure to answer the given questions.
Q: 1. Define the following terms briefly as they relate to the experiments. Cite an example for each…
A:
Q: Aldotetroses exist in the furanose form. Draw both anomers of D-erythrose.
A:
Q: How many aldaric acids are obtained from the 16 aldohexoses?
A: Aldaric acid is the acid having both end of the molecule equivalent due to which the position of…
Q: a) Ketotetrose. b) Ketopentose. c) Aldopentose. d) Aldotetrose. e) Aldohexose. f) None of the above
A: In this question, we will see the class of this given carbohydrate sketch. You can see details…
Q: Which D-aldopentose is oxidized to an optically active aldaric acid and undergoes the Wohl…
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Q: A hexose was obtained after (+)-glyceraldehyde underwent three successive Kiliani–Fischer syntheses.…
A: The above info can be used to identify the hexose as follows:
Q: An unknown reducing disaccharide is found to be unaffected by invertase enzymes. Treatment with an…
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Q: Draw the structures of the individual mutarotating a and b anomers of maltose.
A:
Q: . Trehalose and isomaltose are both dimers of glucose. However, they have considerably different…
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Q: Which aldoses are oxidized to optically inactive aldaric acids: (a) D-erythrose; (b) Dlyxose; (c)…
A: Given aldoses, (a) D-erythrose (b) D-lyxose (c) D-galactose
Q: Trehalose and maltose are both dimers of glucose. However, they have considereably different…
A: Consider a General Sugar If a free OH group like in above sugar is present then the sugar willl…
Q: Monosaccharide A is a diastereomer of d-lyxose. Treatment of A with nitric acid forms an optically…
A: First, the D-lyxose is shown as below by using Fischer projection. For given compound the structure…
Q: What D-aldohexose forms the same osazone as D-glucose?
A:
Q: Provide an explanation for the fact that α-D-mannose is more stable thanβ-D-mannose, whereas the…
A: Anomers are diastereomers that differ only at the hemiacetal or acetal carbon. The hemiacetal or…
Q: An unknown β-d-aldohexose has only one axial substituent. A Wohl degradation forms a compound which,…
A: Aldohexoses can form cyclic structure by fthe formation of bond between aldehydic carbon and…
Q: Predict the products obtained when d-galactose reacts with each reagent.(a) Br2 and H2O
A: The structure of D-galactose is as follows,
Q: Complete the following Fischer esterification reaction
A: Complete the following Fischer esterification reaction
Q: In solution, glucose is mostly found in the cyclic hemiacetal state, which lacks an aldehyde group.…
A: Answer - The sugar glucose may be the most commonly known hemiacetal. A hemiacetal is a carbon…
Q: Illustrate the treatment of methyl α-D-glucopyranoside with aqueous acid forms a mixture of α- and…
A: In methyl α-D-glucopyranoside, methoxy group, (-OCH3) is attached to carbon 1 and in the presence of…
Q: Draw the structure of the polyhydroxy aldehyde that cyclizes to α- and β-D-galactose
A: Galactose is a carbohydrate which is formed from carbon, hydrogen and oxygen. The general formula of…
Q: Which of the d-aldotetroses will give optically active aldaric acids on oxidation with HNO3 ?(
A:
Q: How many stereoisomers are possible for a. a ketoheptose? b. an aldoheptose? c. a ketotriose?
A: Asymmetric(chiral) centre- It is a molecule having a special arrangement of ligands which is not…
Q: Name an aldohexose other than d-glucose that is oxidized to d-glucaric acid by nitric acid. a. What…
A:
Q: How many d-aldoheptoses are possible? Draw the Fischer projection of one of them and its enantiomer.
A: When the monosaccharide unit has seven carbon atoms, it is termed as heptose. When the heptose has…
Q: How many chiral centers are in B-d-glucopyranose and a-D-galactopyranose? How many stereoisomers of…
A: Beta -D-glucopyranose and alpha-D-glucopyranose are isomers. Chiral centers is carbon having four…
Q: Which aldoses are oxidized to optically inactive aldaric acids: (a) D-erythrose; (b) D-lyxose; (c)…
A: All the aldehyde and alcohol groups on aldose are converted to the carboxylic group on oxidation…
Q: Mannose exists in aqueous solution as a mixture of a-d-mannopyranose and b-d-mannopyranose. Draw…
A:
Q: Deduce the structure of trehalose using 2,3,4,6-tetra-O-methyl-D-glucopyranose
A:
Q: Draw the anomers of d-erythrofuranose.
A: To draw the anomers of d-erythrofuranose.
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- 5. Which two D-pentose sugars give optically active alditols when reduced with NABH4 CHO н— он CH2OH D-glyceraldehyde. Сно CHO H HOH H HOH CH2OH „D-erythrose HO H H HOH ČH2OH D-threose CHO CHO CHO CHO -OH HO-H H OH Но -O- H +OH но -H но- H- HFOH CH2OH H- -OH H +OH H FOH CH2OH CH2OH ČH2OH D-ribose D-arabinose D-хylose D-lyхose CHO CHO CHO CHO Сно CHO CHO CHO HO-H HO-H HO-H H HOH но—н но—н H FOH H HOH H +OH HO-H H FOH H- -O- HO-H но- H OH H- -O- но но—н H FOH HO-H H +OH CH2OH H HOH H -OH H HOH H FOH но FH HHOH ČH2OH HHOH ČH2OH H- -OH H -OH H- -OH -OH ČH2OH ČH2OH CH2OH CH2OH ČH2OH D-allose D-altose D-glucose D-mannose D-gulose D-idose D-galactose D-taloseDraw the product formed when each compound reacts with NADH (or NADPH, L Problem 13.8) in the presence of an enzyme. Each reaction occurs during the biosynthesis of an amino acid, a monosaccharide, or a lipid. do H. a. NH3 B-aspartate semialdehyde b.O,PO OPO,2- OH 1,3-bisphosphoglycerate о но C. O H. mevaldehydeClassify each saccharide as an aldose or a ketose. Also classify each as a triose, tetrose, pentose, and so on. но, CH, но H-C-OH H-C-OH H-C-OH HC OH он a. b. OH H H HO-CH:-C H OH H-C-OH ÓH с. HO-CH; d.
- 5) Draw the following sugars in BOTH the alpha and beta pyranose form: C-H Но H- Но C-H HO H- НО H- ОН H- ОН А. CH2OH H- ОН H- ОН CH2OH CH2OH C=0 НО H- H- ОН H Но- CH2OH 'CH,OH c=0 НО- H. H- ОН H- OH CH2OHChoose the a-anomer of the following monosaccharide. CH2OH но -H он ČH2OH CH2OH CH2OH OH OH CH2OH он OH OH ČH2OH он ÓH он он он А В CH2OH CH2OH CH2OH -0 он CH2OH CH2OH OH Он OH OH ÓH он OH Он D E F CA OB OC OD CE OF Enter Your Answer:What reagents are needed to carry out the comversion she OH
- но CH₂OH Но НО anx CH₂OH НО OH CH3OH H* ӧ: H OH OH B-D-glucose Treatment of B-D-glucose with methanol in the presence of an acid catalyst converts it into a mixture of two compounds called methyl glucosides. Draw curved arrow to show the movement of electrons in this step of the reaction mechanism. Arrow-pushing Instructions HO H₂O CH₂OH Q-CH3 OCH3 + HO OH НО methyl B-D-glucoside CH₂OH -Ö: ний но НО CH₂OH НО он methyl a-D-glucoside OH OCH3 Н w-CH3 H2O1. Draw Haworth projections of B-D-arabinofuranose and a-L-mannopyranose. 2. Consider the structure of the disaccharide drawn at right: НО `CH2 В ОН (a) Give the names and D/L designation for the two monosaccharides linked together. H,C-O OHO „OH OH А: НО НО A В: ОН (b) In the structure, circle the anomeric carbon of each saccharide. (c) Is each saccharide present in its a or ß anomer? Specify both A and B (d) Would this disaccharide undergo mutarotation? Why or why not? (e) Would this disaccharide react with Tollens and/or Benedicts reagent? Why or why not? (f) There are two reasons this is very unlikely to be a naturally occurring disaccharide. What about its structure suggests this is true? Give both reasons.8. Draw Haworth projection structures for the a- anomer for these Fischer projections ÇHO CHO но- -H- H- HO- CH HO H -HO- HO- H- HO- H OH CH2OH CH2OH (D)-altrose (D)-glucose HHH
- 5. A boxcar problem: H H H H -OH OH -OH HO H H H -Н -OH -OH CH₂OH D-Arabinose H- HO- H- H OH -Н OH HO HO H- H -Н -H -OH CH₂OH CH₂OH D-Ribose CH₂OH D-Xylose a. A D-aldopentose I can be oxidized with nitric acid to give an optically inactive acid II. What are two possible structures for II? What are the two possible aldopentoses I? b. The D-aldopentose I produces two different aldohexoses on chain lengthening by Kiliani Fischer to give two compounds III & IV. Compound III when oxidized with nitric acid D-LyxoseAlthough reaction occurs in sugars also. H, OH H H-C-OH Oxidizing agent OH OH Н-С-ОН Н-С-ОН C=0 R OH R R R Aldose Aldonic acid anion Ketose Enediol Copyright © 2007 Pearson Prentice Hall, Inc. Draw the reaction above substituting D-fructose instead of the generalized ketose structure shown above (you need to draw all 4 structures). Slan and upload your drawing.Draw the products formed when α-D-galactose is treated with each reagent: i. CH3I (excess), Ag2O ii. CH3OH, H3O+ iii. NaOH, H2O iv. Br2, H2O