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α-D-Glucose has [α]D = +112o,and β-D-glucose has [α]D = +19o.If either anomer is dissolved in water and allowed to reach equilibrium,the specific rotation of the solution is + 52o.What are the percentages of each anomer at equilibrium?

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Percentage of the anomer β at ...

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Refer to the following structures.Which aldohexose when subjected to Fischer's end-group interchange would be converted to a compound identical with itself? Refer to the following structures.Which aldohexose when subjected to Fischer's end-group interchange would be converted to a compound identical with itself? A) I B) II C) III D) IV E) V


A) I
B) II
C) III
D) IV
E) V

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Complete the following reaction: Complete the following reaction:

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The method of lengthening the carbon chain of an aldose through the addition of HCN followed by hydrolysis and reduction is called the ______________.

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Kiliani-Fi...

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What is the ratio of products formed by the reaction of periodic acid with the following compound? What is the ratio of products formed by the reaction of periodic acid with the following compound? H<sub>2</sub>C=O HCO<sub>2</sub>H CO<sub>2</sub> I 5 1 0 II 3 3 0 III 1 5 0 IV 2 3 1 V 0 4 2 A) I B) II C) III D) IV E) V H2C=O HCO2H CO2 I 5 1 0 II 3 3 0 III 1 5 0 IV 2 3 1 V 0 4 2


A) I
B) II
C) III
D) IV
E) V

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Which of the following is the structure of D-galacturonic acid? Which of the following is the structure of D-galacturonic acid? A) I B) II C) III D) IV E) V


A) I
B) II
C) III
D) IV
E) V

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The pyranose form of an aldohexose which can react 1:2 with acetone in the presence of acid is which of these? The pyranose form of an aldohexose which can react 1:2 with acetone in the presence of acid is which of these? A) I B) II C) III D) IV E) V


A) I
B) II
C) III
D) IV
E) V

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What is the structure for A? What is the structure for A?

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What products are expected from the reaction of 3-hydroxy-2,4-pentanedione with 2 molar equivalents of periodic acid?

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Which of these is α-D-glucopyranose? Which of these is α-D-glucopyranose? A) I B) II C) III D) IV E) V


A) I
B) II
C) III
D) IV
E) V

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A compound X reacts with 3 mol of HIO4 to yield 2 mol of HCO2H and 2 mol of HCHO.What is the structure of X? A compound X reacts with 3 mol of HIO4 to yield 2 mol of HCO2H and 2 mol of HCHO.What is the structure of X? A) I B) II C) III D) IV E) V


A) I
B) II
C) III
D) IV
E) V

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Consider the structures below.An L-aldohexose,X,is treated with nitric acid to yield an optically inactive aldaric acid.The same L-aldohexose,X,is subjected to a Ruff degradation and the degradation product is oxidized with nitric acid to produce an optically inactive aldaric acid.Which is a possible structure for X? Consider the structures below.An L-aldohexose,X,is treated with nitric acid to yield an optically inactive aldaric acid.The same L-aldohexose,X,is subjected to a Ruff degradation and the degradation product is oxidized with nitric acid to produce an optically inactive aldaric acid.Which is a possible structure for X? A) I B) II C) III D) IV E) V


A) I
B) II
C) III
D) IV
E) V

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Which of the following would yield D-glucose and D-mannose when subjected to a Kiliani-Fischer synthesis? Which of the following would yield D-glucose and D-mannose when subjected to a Kiliani-Fischer synthesis? A) I B) II C) III D) IV E) V


A) I
B) II
C) III
D) IV
E) V

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Which of these compounds,I,II,III,IV,is a reducing disaccharide? Which of these compounds,I,II,III,IV,is a reducing disaccharide? A) I alone B) II alone C) III alone D) IV alone E) I,II,III,and IV


A) I alone
B) II alone
C) III alone
D) IV alone
E) I,II,III,and IV

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A monosaccharide containing six carbon atoms and an aldehyde functionality is called an _____________.

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When naturally occurring aldotetrose A is reduced with sodium borohydride,meso-1,2,3,4-butanetetrol is formed.What are the name and structure of A?

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A D-aldohexose,Z,is subjected to a Ruff degradation.The degradation product is treated with nitric acid to yield an optically active aldaric acid.A possible structure for Z is: A D-aldohexose,Z,is subjected to a Ruff degradation.The degradation product is treated with nitric acid to yield an optically active aldaric acid.A possible structure for Z is: A) I B) II C) III D) IV E) I,III,IV


A) I
B) II
C) III
D) IV
E) I,III,IV

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Carbohydrates are synthesized in green plants by _____________.

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Which of the following is a D-aldotetrose? Which of the following is a D-aldotetrose? A) I B) II C) III D) IV E) V


A) I
B) II
C) III
D) IV
E) V

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Which reagent would be used for the following transformation? Which reagent would be used for the following transformation? A) CH<sub>3</sub>OH/HCl B) AgNO<sub>3</sub>/C<sub>2</sub>H<sub>5</sub>OH C) Br<sub>2</sub>/CCl<sub>4</sub> D) KMnO<sub>4</sub> E) HIO<sub>4</sub>


A) CH3OH/HCl
B) AgNO3/C2H5OH
C) Br2/CCl4
D) KMnO4
E) HIO4

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