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GLUCOSE - Coggle Diagram
GLUCOSE
structure
C6H12O6
all six carbons in a straight chain
reacting with HI and gives n hexane
presence of carbonyl group
react with hydroxylamine to give amine
react with HCN to give cyanohydrin
presence of carbonyl group as aldehyde
oxidation with br2 water gives gluconic acid
confirm presence of 5 oh groups
acetylation with acetic anhydride to give glucose pentaacetate
presence of OH group
oxidation of glucose and gluconic acid gives saccharic acid
facts not explained by glucose structure
having aldehyde grp, but do not give schiffs test
do not form hydrogensulphite with NaHSO3
pentaacetate of glucose does not react with hydroxyl amine
indicates absence of free CHO grp
exists in two forms
alpha
obtained by crystallisation from conc. glucose at 303K
beta
crystallaisation from hot and saturated glucose solution at 371 K
anomers
haworth structure from pyran
pyranose structure
D represents configuration
derived from glyceraldehyde