Haworth projection of α -pyranose form of the D-aldohexose should be drawn. Concept introduction: The Haworth projection : A Haworth projection is a three-dimensional representation of monosaccharides and the structural formula is inscription as a cyclic structures. In Haworth projection, oxygen atom is placed in back right corner, C H 2 O H is arranged up at the C5 carbon atom. Anomeric hydroxyl group is placed down if it is α-anomer which is trans to the C H 2 O H of C5 carbon. The remaining hydroxyl group is placed up if the hydroxyl group left side in Fischer projection. Hydroxyl group is placed down if the hydroxyl group right side in Fischer projection. Epimer: Epimer is one of a pair of stereoisomers. The two isomers differ in configuration at only one stereogenic center. To find : Haworth projection for α -pyranose form of the D-aldohexose

Question

Want to see the full answer?

Answer 1

Question

Chapter 24, Problem 54PP

Interpretation Introduction

Interpretation:

Haworth projection of α -pyranose form of the D-aldohexose should be drawn.

Concept introduction:

The Haworth projection: A Haworth projection is a three-dimensional representation of monosaccharides and the structural formula is inscription as a cyclic structures.

In Haworth projection, oxygen atom is placed in back right corner, CH2OH is arranged up at the C5 carbon atom. Anomeric hydroxyl group is placed down if it is α-anomer which is trans to the CH2OH of C5 carbon. The remaining hydroxyl group is placed up if the hydroxyl group left side in Fischer projection. Hydroxyl group is placed down if the hydroxyl group right side in Fischer projection.

Epimer: Epimer is one of a pair of stereoisomers. The two isomers differ in configuration at only one stereogenic center.

To find: Haworth projection for α -pyranose form of the D-aldohexose

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

Indicate the processes in the dismutation of Cu2O.

1. Consider these three reactions as the elementary steps in the mechanism for a chemical reaction. 2600 2400 2200 2000 1800 1600 1400 1200 1000 800 Potential Energy (kJ) 600 400 200 0 -200- -400 -600- -800 (i) Cl₂ (g) + Pt(s) → 2Cl (g) + Pt(s) (ii) Cl (g)+ CO (g) + Pt (s) → CICO (g) + Pt (s) Ea = 1550 kJ Ea = 2240 kJ (iii) Cl (g) + CICO (g) → Cl₂CO (g) Ea = 2350 kJ AH=-950 kJ ΔΗ = 575 ΚΙ AH=-825 kJ a. Draw the potential energy diagram for the reaction. Label the data points for clarity. The potential energy of the reactants is 600 kJ Reaction Progress b. What is the overall chemical equation? c. What is the overall change in enthalpy for the above chemical reaction? d. What is the overall amount of activation energy for the above chemical reaction? e. Which reaction intermediate would be considered a catalyst (if any) and why? f. If you were to add 2700kJ of energy to the reaction (e.g. 2700 kl of heat or electricity), would you be able to make the reaction reverse itself (i.e. have…

draw the enolate anion and the carbonyl that would be needed to make this product through an aldol addition reaction.