A hexose is obtained when the residue of a shrub Sterculia setigeria undergoes acid-catalyzed hydrolysis. Identify the hexose from the following experimental information: it undergoes mutarotation; it does not react with Br2; and D-galactonic acid and D-talonic acid are formed when it reacts with Tollens’ reagent.

Q: Aldohexoses A and B both undergo Ruff degradation to give aldopentose C. On treatment with warm…

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Q: An unknown disaccharide gives a positive Tollens’ test. A glycosidase hydrolyzes it to d-galactose…

A: D-galactose monosaccharide in a reactant comprises the acetal group. One of the monosaccharides must…

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: 2. Draw structures for furanose and pyranose forms of D- lyxose. Draw the scheme of a tautomeric…

A: Furanose is a heterocyclic five-membered ring compound containing 4 carbon atoms and an oxygen atom.…

Q: The following observations are obtained after a D-hexose was made to react with several reagents:…

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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: An unknown carbohydrate of formula C12H22O11 reacts with Tollens reagent to form asilver mirror. An…

A:

Q: Predict the products obtained when d-galactose reacts with each reagent.  (h) NaBH4(i) Br2, H2O,…

A: d-galactose is a monosaccharide and it is a C-4 epimer of the glucose. Epimer is a diastereomer n…

Q: Ruff degradation of d-arabinose gives d-erythrose. The Kiliani–Fischer synthesis converts…

A:

Q: Which of the d-aldopentoses will give optically active aldaric acids on oxidation with HNO3 ?(

A: The D-aldopentoses which which give optically active aldaric acids on oxidation with HNO3 are D-…

Q: An aldopentose "O", is oxidized with HNO3 to a diacid "P" which is optically active. The compound…

A: Compounds with mirror plane are optically inactive.

Q: Show the product that results when fructose is treated with an excess of methyl iodideand silver…

A: Given data :   Show the product that results when fructose is treated with an excess of methyl…

Q: Prove that gentiobiose  forms osazone and can undergo mutarotation can be hyrolyzed by Emulsin…

A: Answer - According to the question - Osazone formation: This reaction is used to identify…

Q: The tartaness of some wines is high concentration of l malate.write a consequence of reactions…

A: Under anaerobic conditions means absence of oxygen, yeast will utilize carbon dioxide to ferment.…

Q: Below are drawn the different chair conformations of the methyl glycoside of galactose. но он но он…

A: II) The name of compound is alpha- acetyl mannose.

Q: Kojibiose is a reducing sugar that forms D-glucose on hydrolysis with aqueous acid. Reaction of…

A: The sugars or carbohydrates which can behave as the reducing agent because of the presence of free…

Q: Predict the products obtained when d-galactose reacts with each reagent.(a) Br2 and H2O (b) NaOH,…

A: Hey since you have posted a question with multiple sub-parts, we will solve first three sub-parts…

Q: Emil Fischer synthesized l-gulose, an unusual aldohexose that reduces to give d-glucitol.Suggest a…

A: The structure of D-glucitol is shown below.

Q: The reagent periodate (IO,") oxidatively cleaves the carbon-carbon bonds between two adjacent…

A: Periodate is an oxidative reagent that cleaves carbon-carbon bonds carrying hydroxyl groups…

Q: rehalose is a disaccharide that can be obtained from fungi, sea urchins and insects. Acid hydrolysis…

A: The compound trehalose is types of the disaccharide that is not the reducing sugar. They are…

Q: 3. Write the structure of the product formed when D-mannose is oxidized with warm, dilute HNO3.…

A: Structure of d mannose

Q: The following observations are obtained after a D-hexose was made to react with (1) The reactions of…

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Q: Mutarotation occurs when the two anomers interconvert in solution. Outline a stepwise mechanism for…

A: The alpha and bita glucose are interconvertable. The mechanism has been drawn below

Q: Write a reaction and mechanism for the formation of osazone when D-erythrose reacts with excess of…

A: Reducing sugars like glucose react with phenyl hydrazine to give phenyl hydrazone of glucose,…

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: Draw the expected product of the reaction of the following sugars with excess methyliodide and…

A: The –OH group present in given sugar reacts with alkylating agents like CH3I and Ag2O and results in…

Q: (a) Which of the d-aldopentoses will give optically active aldaric acids on oxidation with HNO3 ?(b)…

A: (C) The sugar X is D-galactose as it reacts with nitric acid to give an optically inactive structure…

Q: What aldoses are formed when the following aldoses are subjected to the Kiliani–Fischer synthesis:…

A: In Kiliani-Fisher synthesis is used to extend the chain of the aldose. In which addition of cyanide…

Q: 8. IGH CH₂OH Despite being a ketohexose. D-sorbose shows a positive result in Benedict's test.…

A:

Q: trehalose is a disacharide that can be obtained from fungi sea uchins and insects. acid hydrolysis…

A: From the given information, The hydrolysis of trehalose results the 2 D-glucose molecules, the…

Q: Predict the products obtained when d-galactose reacts with each reagent.(a) Br2 and H2O (b) NaOH,…

A: SOLUTION: Step 1: (a). d-galactose on oxidation with bromine water forms galactonic acid. The…

Q: Predict the products obtained when d-galactose reacts with each reagent.  (f) excess Ac2O and…

A: Galactose is a monosaccharide which contains six carbons and aldehyde group. It exists in D and L…

Q: Mutarotation occurs when the two anomers interconvert in solution. Outline a stepwise mechanism for…

A: The change in optical rotation observed when glucose dissolved in water. This is due to…

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.  (c) CH3OH, H + (d) Ag(NH3)…

A: Answer (c):  When D-galactose react treat with methanol in acidic medium, then the formation of…

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: A 2-ketohexose is reduced with NaBH4 in CH3OH to form a mixture of D-galactitol and Dtalitol. What…

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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: Treatment with NaBH 4 converts aldose U into an optically inactive (meso) alditol V. Ruff…

A: Aldose: These are simple sugar or monosaccharide with carbon chain having Aldehyde group at top most…

Q: Hexose A is a reducing sugar, periodate oxidation gave the products shown below, and hexose A gave…

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Q: Deduce the structure of trehalose using 2,3,4,6-tetra-O-methyl-D-glucopyranose

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Q: Carbohydrates classification.

A: "Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: 6. the product of no.5 undergoes dehydration 7. D-arabinose reacts with dilute nitric acid with…

A: According to our guidelines I am answering first three questions only 6.The product of no.5…

Q: An unknown disaccharide gives a positive Tollens’ test. A glycosidase hydrolyzes it to D-galactose…

A: D-galactose monosaccharide in a reactant comprises the acetal group. One of the monosaccharides must…

NMR Spectroscopy

NMR stands for Nuclear Magnetic Resonance in which the study of different molecules is done based on the interaction of radiofrequency electromagnetic radiations with the nuclei of molecules placed in a strong magnetic field. A precise study of spectra of visible light and all bands of electromagnetic radiation is called spectroscopy.