m2 Flashcards
True or False: Monosaccharides can be further hydrolized into smaller units.
False
What are its usual definig properties?
- crystalline
- soluble in water
- sweet in taste
How should you call monosaccharides provided that they contain either aldehydes or ketones respectively?
aldoses and ketoses
True or False: All monosaccharides are reducing in nature.
True
The reducing sugars reduce the blue Cu2+ in what solution?
Benedict’s solution
What does the blue Cu2+ reduction turn out to be afterwards?
red precipitate of Cu+
Teese are carbohydrates which vary in one position for the placement of the -OH group.
Epimers
A furan ring structure has how many carbons?
four
A pyran ring structure has how many carbons?
five
What are the characteristics of monosaccharide cyclization?
- spontaneous
- reversible
What happens when an alcohol adds to a ketone?
A hemiketal is formed.
What happens when an alcohol is added to an aldehyde?
A hemiacetal is formed.
In which specific carbon can you locate the hemiacetal/hemiketal group of a cyclic monosaccharide?
C1 or carbon-one
When cyclization happens, a new stereocenter is acquired, what do you call this?
Anomer
The 1 and 6 positions are in the trans conformation above and below the ring
a - Conformation
