Explanations 
Textbooks 
Exams 
GCSE 
IGCSE 
AS 
A Level 
International A Level 
University Admissions Tests 
Flashcards 
Vaia AI 
Notes 
Study Plans 
Study Sets 
Find a job 
Find a degree 
Student Deals 
Magazine 
Mobile App Chapter 13: Q. 13.28 (page 446)
Fructose is the sweetest monosaccharide. How does the Fischer projection of -fructose differ from that of D-glucose?
Short Answer
Expert verified
glucose is an aldohexose, whereasfructose is a ketohexose.
Step by step solution
01
Introduction
In this task, we must describe the structural difference betweenfructose and glucose (in Fischer projections).
02
Explanation
- Aldohexose and ketohexose, for example, are monosaccharides with six carbons.
- The aldehyde group is present in aldohexoses, whereas the ketone group is present in ketohexoses.
- fructose, a ketohexose, andglucose, an aldohexose, are the sugars in this example.
03
Draw the of D-fructose from D-glucose.
- This indicates that the distinction is between the first two carbons, which contain carbonyl groups (marked in blue in the Figure below).
- D-glucose has four stereogenic centres and an aldehyde group, whereas D-fructose has three stereogenic centres and a ketone group.
- The rest of the molecule is identical except for the first two carbons.
Over 30 million students worldwide already upgrade their learning with Vaia!
