To methyl α-D-mannopyranoside (methyl α-D-mannoside), Haworth projection and chair conformations has to be given and the anomeric carbon and the glycosidic bond has to be labelled. Concept Introduction: The aldehydes or ketones reacts with alcohol to form cyclic hemiacetal. If hemiacetal reacts with another alcohol molecule it forms acetal. Acetal is also known as glycoside. The bond formed between the anomeric carbon and the alcohol molecule is said to be glycosidic bond.

Question

8. Draw all the resonance forms for each of the following molecules or ions, and indicate the major contributor in each case, or if they are equivalent. (4.5 pts) (a) PH2 سمة

Answer 1

Question

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 25.3, Problem 25.4P

Interpretation Introduction

Interpretation:

To methyl α-D-mannopyranoside (methyl α-D-mannoside), Haworth projection and chair conformations has to be given and the anomeric carbon and the glycosidic bond has to be labelled.

Concept Introduction:

The aldehydes or ketones reacts with alcohol to form cyclic hemiacetal. If hemiacetal reacts with another alcohol molecule it forms acetal. Acetal is also known as glycoside.

The bond formed between the anomeric carbon and the alcohol molecule is said to be glycosidic bond.

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8. Draw all the resonance forms for each of the following molecules or ions, and indicate the major contributor in each case, or if they are equivalent. (4.5 pts) (a) PH2 سمة

3. Assign absolute configuration (Rors) to each chirality center. a. H Nitz C. он b. 0 H-C. C H 7 C. ་-4 917-417 refs H 1つ ८ ડુ d. Но f. -2- 01 Ho -OH 2HN

How many signals do you expect in the H NMR spectrum for this molecule? Br Br Write the answer below. Also, in each of the drawing areas below is a copy of the molecule, with Hs shown. In each copy, one of the H atoms is colored red. Highlight in red all other H atoms that would contribute to the same signal as the H already highlighted red. Note for advanced students: In this question, any multiplet is counted as one signal. Number of signals in the 'H NMR spectrum. For the molecule in the top drawing area, highlight in red any other H atoms that will contribute to the same signal as the H atom already highlighted red. If no other H atoms will contribute, check the box at right. No additional Hs to color in top molecule For the molecule in the bottom drawing area, highlight in red any other H atoms that will contribute to the same signal as the H atom already highlighted red. If no other H atoms will contribute, check the box at right. No additional Hs to color in bottom molecule

Answer 2

Question

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 25.3, Problem 25.4P

Interpretation Introduction

Interpretation:

To methyl α-D-mannopyranoside (methyl α-D-mannoside), Haworth projection and chair conformations has to be given and the anomeric carbon and the glycosidic bond has to be labelled.

Concept Introduction:

The aldehydes or ketones reacts with alcohol to form cyclic hemiacetal. If hemiacetal reacts with another alcohol molecule it forms acetal. Acetal is also known as glycoside.

The bond formed between the anomeric carbon and the alcohol molecule is said to be glycosidic bond.

Expert Solution & Answer

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Check out sample textbook solution

Answer 3

Question

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 25.3, Problem 25.4P

Interpretation Introduction

Interpretation:

To methyl α-D-mannopyranoside (methyl α-D-mannoside), Haworth projection and chair conformations has to be given and the anomeric carbon and the glycosidic bond has to be labelled.

Concept Introduction:

The aldehydes or ketones reacts with alcohol to form cyclic hemiacetal. If hemiacetal reacts with another alcohol molecule it forms acetal. Acetal is also known as glycoside.

The bond formed between the anomeric carbon and the alcohol molecule is said to be glycosidic bond.

Expert Solution & Answer

Trending nowThis is a popular solution!

See solution

Check out sample textbook solution

Answer 4

Question

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 25.3, Problem 25.4P

Interpretation Introduction