The D-aldopentoses which can be reduced to optically inactive alditols using NaBH 4 , CH 3 OH is to be predicted. Concept introduction: Carbohydrates are naturally occurring compounds. Carbohydrates are polyhydroxy aldehydes or ketones . The monosaccharide with five carbon atoms and aldehyde group is known as D-aldopentoses. The monosaccharide in which the aldehyde or ketone group is replaced with alcohol group is known as alditols.

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Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 28, Problem 28.56P

Interpretation Introduction

Interpretation: The D-aldopentoses which can be reduced to optically inactive alditols using NaBH4, CH3OH is to be predicted.

Concept introduction: Carbohydrates are naturally occurring compounds. Carbohydrates are polyhydroxy aldehydes or ketones. The monosaccharide with five carbon atoms and aldehyde group is known as D-aldopentoses. The monosaccharide in which the aldehyde or ketone group is replaced with alcohol group is known as alditols.

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MISSED THIS? Read Section 19.9 (Pages 878-881); Watch IWE 19.10 Consider the following reaction: CH3OH(g) CO(g) + 2H2(g) (Note that AG,CH3OH(g) = -162.3 kJ/mol and AG,co(g)=-137.2 kJ/mol.) Part A Calculate AG for this reaction at 25 °C under the following conditions: PCH₂OH Pco PH2 0.815 atm = 0.140 atm 0.170 atm Express your answer in kilojoules to three significant figures. Ο ΑΣΦ AG = -150 Submit Previous Answers Request Answer □? kJ × Incorrect; Try Again; 2 attempts remaining Calculate the free energy change under nonstandard conditions (AGrxn) by using the following relationship: AGrxn = AGrxn + RTInQ, AGxn+RTInQ, where AGxn is the standard free energy change, R is the ideal gas constant, T is the temperature in kelvins, a is the reaction quotient. Provide Feedback Next >

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Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 28, Problem 28.56P

Interpretation Introduction

Interpretation: The D-aldopentoses which can be reduced to optically inactive alditols using NaBH4, CH3OH is to be predicted.

Concept introduction: Carbohydrates are naturally occurring compounds. Carbohydrates are polyhydroxy aldehydes or ketones. The monosaccharide with five carbon atoms and aldehyde group is known as D-aldopentoses. The monosaccharide in which the aldehyde or ketone group is replaced with alcohol group is known as alditols.

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Answer 3

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Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 28, Problem 28.56P

Interpretation Introduction

Interpretation: The D-aldopentoses which can be reduced to optically inactive alditols using NaBH4, CH3OH is to be predicted.

Concept introduction: Carbohydrates are naturally occurring compounds. Carbohydrates are polyhydroxy aldehydes or ketones. The monosaccharide with five carbon atoms and aldehyde group is known as D-aldopentoses. The monosaccharide in which the aldehyde or ketone group is replaced with alcohol group is known as alditols.

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Check out a sample textbook solution

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Answer 4

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Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 28, Problem 28.56P

Interpretation Introduction