14.18 Enumerate the reactions of D-glucose which cannot be explained by its open chain structure.
14.18 Enumerate the reactions of D-glucose which cannot be explained by its open chain structure.
-
1 Answer
-
14.18
Open structure of D-glucose could not explain the following reactions:
(i) Despite having the aldehyde group, glucose does not give 2,4 DNP test and Schiff's
(ii) Glucose does not react with sodium hydrogen sulphite to form addition
(iii) The absence of free –CHO group is shown when the penta-acetate of glucose does not react with hydroxyl
(iv) When glucose is heated with methanol in the presence of dry HCl gas, it forms two isomeric monomethyl derivatives known as? -D-glucoside and? -D-glucoside. Since only one molecule of methanol is used for the formation of methyl glucosided, these must be hemiacetals.
Similar Questions for you
Insulin is a globular proteins.
Ionisation enthalpy increases in a period. Z dominates over screening effect (s) in a period as Zeff. increases.
Kindly go through the solution
Histidine is an essential amino acid
Lactose is a disaccharide which is formed by forming C? -C? glycosidic linkage between D-galactose and D- glucose.
Lactose - (Hydrolysis)-> D - galactose + D - glucose
Taking an Exam? Selecting a College?
Get authentic answers from experts, students and alumni that you won't find anywhere else
Sign Up on ShikshaOn Shiksha, get access to
- 65k Colleges
- 1.2k Exams
- 688k Reviews
- 1800k Answers