Concept explainers
(a)
Interpretation:
The Haworth projections of
Concept introduction:
α-D Ribofuranose and β-D Ribofuranose are stereoisomers that differ only at one asymmetric carbon called anomeric carbon and are called anomers.
Haworth projection of the cyclic structure of a ribose (a pentose) shows the cyclic structure as planar, with the substituents pointing straight up or down. The ring oxygen is shown directly opposite the observer, with the anomeric carbon to its immediate right.
(b)
Interpretation:
The mechanism of the formation of
Concept introduction:
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Organic Chemistry: Principles and Mechanisms (Second Edition)
- a) Draw Haworth projections of both - and -anomers of D-fructose. Indicate which carbon is the anomeric carbon.b) Sucrose is a disaccharide made up of a molecule of D-fructose and D-glucose. Draw the structure of sucrose clearly indicating the linkage between the two monosaccharides and its biological significance.c) Tollen’s reagent is a very mild oxidizing agent which normally oxidize aldehydes but not ketones. However, both glucose and fructose give positive results with Tollen’s reagent and are classified as reducing sugars. Explain how fructose can also give positive results with Tollen’s reagent (illustrate using structures).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_forwardClick on all glycosidic bonds in the structure below.arrow_forward
- Draw the structure of: (a) a polysaccharide formed by joining D-mannose units in 1->4-ß-glycosidic linkages; (b) a polysaccharide formed by joining D-glucose units in 1->6-a-glycosidic linkages. The polysaccharide in (b) is dextran, a component of dental plaque.arrow_forwardSee attached image. Based on the results given above, which statement is most true? Sample A is a reducing sugar while Sample B is a nonreducing sugar. Sample A and Sample B are aldohexoses. Sample C is made up of a ketohexose and an aldohexose Sample A and Sample C are disaccharides while Sample B is a monosaccharide. Sample A, B, and C are all nonreducing sugars,arrow_forwardDraw the structures (using chair conformations of pyranoses) of the following disaccharides.(a) 4-O-(a-d-glucopyranosyl)-d-galactopyranose(arrow_forward
- The following trisaccharide derivative is important to human health.The A ring is a deoxy derivative of which aldohexose?arrow_forwardmy question : Draw a three-dimensional line structure of the Fischer projection (a) using the template (c) fischer projection a is the monosaccharide but just in a different format which doesnt really matter. please just use template to show me the fischer projection of the monosaccharidearrow_forwardWhich statement about saccharides is correct? (A). Alpha anomers are more common than beta anoomers. (B). Two monosaccharides can form a disaccharide and oxygen. (C). Polysaccharides with alpha or beta glycosidic linkages have the different properties. (D). Disaccharides can be cyclic or acyclic.arrow_forward
- Show the linkages between a trisaccharide with the sequence GleA-GlcA-GICA. The trisaccharide has an al-→4 glycosidic linkage between the first and second \GlcA monosaccharides. The trisaccharide has a f1-4 glycosidic linkage between the second and third GlcA monosaccharides. Show stereochemistry using wedge (upward) or dash (downward) bonds. Select Draw Rings More Erase COOH соон соон it OH OH он он онarrow_forwardA fischer projection of a monosaccharide is shown below (see photo). classify this monosaccharide (e.g., aldotriose) does it have the D or L configuration?arrow_forwardDraw the enantiomer for the following monosaccharide.arrow_forward