Cyclic structure of Glucose Flashcards
despite having aldehyde group, glucose does not give —— test
Schiff’s test
Glucose does not form the hydrogensulfite addition product with
NaHSO3
The pentaacetate of glucose does not react with hydroxylamine indicating the absence of
free -CHO group
How is Beta form of glucose obtained?
by crystallisation from hot and saturated aqueous soln at 371 K
How is alpha form of glucose made?
crystallisation from conc glucose solution at 303 K
At which position of -OH, it is involved in ring formation?
C5
It was proposed that one of the -OH group may add to the -CHO group to form
a cyclic hemiacetal structure
The two cyclic hemiacetal forms of glucose differ only in?
configuration of anomeric carbon
What is anomeric carbon?
The aldehyde C before cyclisation is anomeric Carbon
Six membered cyclic structure of glucose is called
pyranose structure
Pyran has —- O and ——C atoms in the ring
1 oxygen ; 5 carbon