Organic Chemistry
9th Edition
ISBN: 9781305080485
Author: John E. McMurry
Publisher: Cengage Learning
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Chapter 25.SE, Problem 38AP
Interpretation Introduction
Interpretation:
Structural relation between the two sugars has to be deduced. Based on which the physical properties of the compounds can be justified.
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Draw the structures (using chair conformations of pyranoses) of the following disaccharides.(a) 4-O-(a-d-glucopyranosyl)-d-galactopyranose(
Explain the meaning of the following:
(a) Chiral carbon
(b) Enantiomers
(c) Esterification
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Chapter 25 Solutions
Organic Chemistry
Ch. 25.1 - Prob. 1PCh. 25.2 - Prob. 2PCh. 25.2 - Prob. 3PCh. 25.2 - Prob. 4PCh. 25.2 - Prob. 5PCh. 25.3 - Prob. 6PCh. 25.3 - Prob. 7PCh. 25.4 - Prob. 8PCh. 25.4 - Prob. 9PCh. 25.4 - Prob. 10P
Ch. 25.5 - Prob. 11PCh. 25.5 - Prob. 12PCh. 25.5 - Prob. 13PCh. 25.5 - Prob. 14PCh. 25.5 - Prob. 15PCh. 25.6 - Prob. 16PCh. 25.6 - Prob. 17PCh. 25.6 - Prob. 18PCh. 25.6 - Prob. 19PCh. 25.6 - Prob. 20PCh. 25.6 - Prob. 21PCh. 25.6 - Prob. 22PCh. 25.6 - Prob. 23PCh. 25.7 - Prob. 24PCh. 25.8 - Show the product you would obtain from the...Ch. 25.SE - Prob. 26VCCh. 25.SE - Prob. 27VCCh. 25.SE - Prob. 28VCCh. 25.SE - Prob. 29VCCh. 25.SE - Prob. 30MPCh. 25.SE - Prob. 31MPCh. 25.SE - Glucosamine, one of the eight essential...Ch. 25.SE - D-Glicose reacts with acetone in the presence of...Ch. 25.SE - Prob. 34MPCh. 25.SE - Prob. 35MPCh. 25.SE - Prob. 36APCh. 25.SE - Prob. 37APCh. 25.SE - Prob. 38APCh. 25.SE - Prob. 39APCh. 25.SE - Prob. 40APCh. 25.SE - Assign R or S configuration to each chirality...Ch. 25.SE - Prob. 42APCh. 25.SE - Prob. 43APCh. 25.SE - Prob. 44APCh. 25.SE - Prob. 45APCh. 25.SE - Prob. 46APCh. 25.SE - Prob. 47APCh. 25.SE - Prob. 48APCh. 25.SE - Prob. 49APCh. 25.SE - Prob. 50APCh. 25.SE - Prob. 51APCh. 25.SE - Prob. 52APCh. 25.SE - Prob. 53APCh. 25.SE - Prob. 54APCh. 25.SE - Prob. 55APCh. 25.SE - Prob. 56APCh. 25.SE - Prob. 57APCh. 25.SE - Prob. 58APCh. 25.SE - Prob. 59APCh. 25.SE - Prob. 60APCh. 25.SE - Prob. 61APCh. 25.SE - Prob. 62APCh. 25.SE - Prob. 63APCh. 25.SE - D-Mannose reacts with acetone to give a...Ch. 25.SE - Prob. 65APCh. 25.SE - Prob. 66APCh. 25.SE - Prob. 67APCh. 25.SE - Prob. 68APCh. 25.SE - Prob. 69APCh. 25.SE - Prob. 70APCh. 25.SE - Prob. 71AP
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- How many chiral centers are in B-d-glucopyranose and a-D-galactopyranose? How many stereoisomers of these two aldohexoses can theoretically be drawn?arrow_forwardDraw the structure and give the systematic name of the given disaccharides. [No need to show the stepwise process] (a) Lactose which is also known as milk sugar: β-D-Gal(1à4)β-D-Glc, where Gal is galactose and Glc is glucose.arrow_forwardHow many asymmetric carbons and stereoisomers are there for an aldohexose? For aketohexose?arrow_forward
- Lactose is a disaccharide in which a glycosidic linkage connects the monosaccharides galactose and glucose. OH НО OH (a) Identify the glycosidic linkage and the acetal carbon in lactose. (b) What type of glycosidic linkage does lactose have (i.e., is it 1,1'-, 1,2'-, etc., and is it a or B)? (c) People who are lactose intolerant are deficient in the enzyme lactase, and therefore cannot efficiently break down the disaccharide into its monosaccharides. When lactose is treated with aqueous acid, however, this hydrolysis can take place, though relatively slowly. Draw the complete, detailed mechanism and the products of the acid-catalyzed hydrolysis of lactose. Но ОН НО ОН ОН Lactosearrow_forwardConsider N-acetyl-d-glucosamine Q.) Draw a chair conformation for the disaccharide formed by joining two units of the pyranose form of N-acetyl-d-glucosamine by a b-1,4-glycosidic bond. If you draw this correctly, you have the structural formula for the repeating dimer of chitin, the structural polysaccharide component of the shell of lobsters and other crustaceans.arrow_forwardIndicate the position of the following functional groups in the disaccharide drawn below [they may not all be present !!]. (a) primary alcohol (b) ether (c) secondary alcohol (d) acetal (e) aldehyde (f) tertiary alcohol (g) hemiacetal (h) ketone CH2OH он он CH2OH он но он он Draw the structures of the product monosaccharides obtained after hydrolysis of the above disaccharide.arrow_forward
- (d) Use the diagram below to complete the cyclic alpha form of structure V (e) Circle the hemiacetal in cyclic alpha form of structure V. (f) Redraw the cyclic alpha form of structure V but replace the OH group on the anomericcarbon with a methoxy group. Is this modified monosaccharide a reducing sugar or anonreducing sugar?arrow_forwardDraw the structures (using chair conformations of pyranoses) of the following disaccharides. a-d-fructofuranosyl-b-d-mannopyranoside(arrow_forwardPlease don't provide handwriting solutionarrow_forward
- Which of the following statements is true for a pair of ENANTIOMERS? A) they will have identical physiological properties. B) they will have specific rotations of opposite sign. C) they will have different molar masses. D) they will have different physical properties.arrow_forwardb) Disaccharide E is a reducing sugar. It is hydrolyzed by an α-glycosidase enzyme, which means it contains an α- glycoside link. Treatment of E with Ag2O and excess Mel gives an octamethyl derivative F. Hydrolysis of F in dilute aqueous acid gives the pair of molecules shown below. Write the structures of E and F. (If the stereochemistry at a particular carbon is not determined by the above data, indicate this with a wavy line as shown below.) HO OMe OMe Is is MeO MeO MOH OMe mOH OMe OMearrow_forwardHow many constitutional isomers of acyclic monosaccharides are there that can be classified as aldohexoses? As ketohexoses?arrow_forward
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