The explanation to why phosphonium ylide reacts with aldehyde or ketone to form an alkene but a sulfonium ylide forms an epoxide has to be given. Concept introduction: Ylides: Ylides are those compounds in which a negatively charged species such as carbanion is attached directly to a heteroatom like sulfur and phosphorous. Some examples of such compounds are phosphorus ylides, sulfonium ylides, carbonyl ylides and oxonium ylides.

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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 16, Problem 82P

Interpretation Introduction

Interpretation:

The explanation to why phosphonium ylide reacts with aldehyde or ketone to form an alkene but a sulfonium ylide forms an epoxide has to be given.

Concept introduction:

Ylides:

Ylides are those compounds in which a negatively charged species such as carbanion is attached directly to a heteroatom like sulfur and phosphorous. Some examples of such compounds are phosphorus ylides, sulfonium ylides, carbonyl ylides and oxonium ylides.

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A J то گای ه +0 Also calculate the amount of starting materials chlorobenzaldehyde and p-chloroacetophenone required to prepare 400 mg of the given chalcone product 1, 3-bis(4-chlorophenyl)prop-2-en-1-one molar mass ok 1,3-bis(4-Chlorophenyl) prop-2-en-1-one = 277.1591m01 number of moles= 0.400/277.15 = 0.00144 moles 2 x 0.00 144=0.00288 moves arams of acetophenone = 0.00144 X 120.16 = 0.1739 0.1739x2=0.3469 grams of benzaldehyde = 0.00144X106.12=0.1539 0.1539x2 = 0.3069 Starting materials: 0.3469 Ox acetophenone, 0.3069 of benzaldehyde 3

1. Answer the questions about the following reaction: (a) Draw in the arrows that can be used make this reaction occur and draw in the product of substitution in this reaction. Be sure to include any relevant stereochemistry in the product structure. + SK F Br + (b) In which solvent would this reaction proceed the fastest (Circle one) Methanol Acetone (c) Imagine that you are working for a chemical company and it was your job to perform a similar reaction to the one above, with the exception of the S atom in this reaction being replaced by an O atom. During the reaction, you observe the formation of three separate molecules instead of the single molecule obtained above. What is the likeliest other products that are formed? Draw them in the box provided.

3. For the reactions below, draw the arrows corresponding to the transformations and draw in the boxes the reactants or products as indicated. Note: Part A should have arrows drawn going from the reactants to the middle structure and the arrows on the middle structure that would yield the final structure. For part B, you will need to draw in the reactant before being able to draw the arrows corresponding to product formation. A. B. Rearrangement ΘΗ

Answer 2

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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 16, Problem 82P

Interpretation Introduction

Interpretation:

The explanation to why phosphonium ylide reacts with aldehyde or ketone to form an alkene but a sulfonium ylide forms an epoxide has to be given.

Concept introduction:

Ylides:

Ylides are those compounds in which a negatively charged species such as carbanion is attached directly to a heteroatom like sulfur and phosphorous. Some examples of such compounds are phosphorus ylides, sulfonium ylides, carbonyl ylides and oxonium ylides.

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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 16, Problem 82P

Interpretation Introduction

Interpretation:

The explanation to why phosphonium ylide reacts with aldehyde or ketone to form an alkene but a sulfonium ylide forms an epoxide has to be given.

Concept introduction:

Ylides:

Ylides are those compounds in which a negatively charged species such as carbanion is attached directly to a heteroatom like sulfur and phosphorous. Some examples of such compounds are phosphorus ylides, sulfonium ylides, carbonyl ylides and oxonium ylides.

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Check out a sample textbook solution

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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 16, Problem 82P

Interpretation Introduction