题目
题目

CHE 008B A01 SS1 2025 Lecture 10/11 - Reactions of Linear Carbohydrates

匹配题

Match the following terms about carbohydrates 1: aldaric acid 2: aldonic acid 3: alditol 4: osazone 5: Kiliani-Fischer Synthesis 6: xylitol

选项
A.modified sugar with a single terminal carboxylic acid
B.modified carbohydrate with two C=N-NHR groups
C.makes a carbohydrate with a single carbon shorter chain
D.a carboxylic acid used for melting points
E.a polyalcohol used as an energy storage compound
F.makes a carbohydrate with an extra carbon in the chain
G.a modified sugar with an imine
H.the highest numbered stereocenter
I.reduced sugar with no carbonyl
J.a modified sugar with no alcohols
K.a poly alcohol used as a sweetner
L.modified sugar with terminal dicarboxylic acids
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标准答案
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思路分析
The question asks you to match six carbohydrate-related terms with their definitions or descriptions from the provided answer options. We are given the correct matches in the 'answer' list in order for items 1 through 6. The full set of potential definitions is shown in 'answer_options', and you should pair each item with the option that best fits the corresponding term. Item 1 corresponds to aldaric acid. The correct match in the answer list for item 1 is the first option: 'modified sugar with terminal dicarboxylic acids'. This makes sense because aldaric acids are products of oxidation of both ends of an aldose, forming carboxyl groups at both ends, i.e., terminal dicarboxylic acids. Other options here would not describe a sugar with two terminal carboxyl groups (for examp......Login to view full explanation

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Determine if each of the following is True or False:   True Acetals of sugars only open to carbonyls in acidic conditions so are non-reducing. True Hemiacetals and acetals are more reactive in acidic conditions than alcohols or ethers. True It is possible to selectively form or break bonds at the anomeric carbon vs. other carbons in a carbohydrate. True Reactions in basic conditions will tend to keep the stereochemistry of the anomer, while reactions in acidic conditions will tend to mix the stereochemistry of the anomer. True Alcohols in carbohydrates form ethers analogously to simple alcohols. False Reducing sugars are always ketoses.

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