The way by which the given synthesis is being accomplished has to be shown and explanation for the stereoselective synthesis of 10-trans-12-cis isomer. Concept introduction: Wittig Reaction: It is an organic reaction where an aldehyde or a ketone gets converted to an alkene by replacing carbonyl group by a C = C bond. A phosphorous ylide is used for this conversion. It is a neutral molecule where a positively charged phosphorous is attached to a negatively charged carbon atom. Non-stabilized ylide (having electron donating group on negatively charged carbon) gives Z-isomer whereas stabilized ylide (having electron withdrawing group on negatively charged carbon) gives E-isomer. Non–stabilized ylide (having electron donating group on negatively charged carbon) gives Z–isomer whereas stabilized ylide (having electron withdrawing group on negatively charged carbon) gives E–isomer.

Question

Which carbocation is more stable?

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 18, Problem 18.54P

Interpretation Introduction

Interpretation:

The way by which the given synthesis is being accomplished has to be shown and explanation for the stereoselective synthesis of 10-trans-12-cis isomer.

Concept introduction:

Wittig Reaction: It is an organic reaction where an aldehyde or a ketone gets converted to an alkene by replacing carbonyl group by a C=C bond. A phosphorous ylide is used for this conversion. It is a neutral molecule where a positively charged phosphorous is attached to a negatively charged carbon atom.

Non-stabilized ylide (having electron donating group on negatively charged carbon) gives Z-isomer whereas stabilized ylide (having electron withdrawing group on negatively charged carbon) gives E-isomer.

Non–stabilized ylide (having electron donating group on negatively charged carbon) gives Z–isomer whereas stabilized ylide (having electron withdrawing group on negatively charged carbon) gives E–isomer.

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Which carbocation is more stable?

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The question below asks why the products shown are NOT the correct products. I asked this already, and the person explained why those are the correct products, as opposed to what we would think should be the correct products. That's the opposite of what the question was asking. Why are they not the correct products? A reaction mechanism for how we arrive at the correct products is requested ("using key intermediates"). In other words, why is HCl added to the terminal alkene rather than the internal alkene?

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 18, Problem 18.54P

Interpretation Introduction

Interpretation:

The way by which the given synthesis is being accomplished has to be shown and explanation for the stereoselective synthesis of 10-trans-12-cis isomer.

Concept introduction:

Wittig Reaction: It is an organic reaction where an aldehyde or a ketone gets converted to an alkene by replacing carbonyl group by a C=C bond. A phosphorous ylide is used for this conversion. It is a neutral molecule where a positively charged phosphorous is attached to a negatively charged carbon atom.

Non-stabilized ylide (having electron donating group on negatively charged carbon) gives Z-isomer whereas stabilized ylide (having electron withdrawing group on negatively charged carbon) gives E-isomer.

Non–stabilized ylide (having electron donating group on negatively charged carbon) gives Z–isomer whereas stabilized ylide (having electron withdrawing group on negatively charged carbon) gives E–isomer.

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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 18, Problem 18.54P

Interpretation Introduction

Interpretation:

The way by which the given synthesis is being accomplished has to be shown and explanation for the stereoselective synthesis of 10-trans-12-cis isomer.

Concept introduction:

Wittig Reaction: It is an organic reaction where an aldehyde or a ketone gets converted to an alkene by replacing carbonyl group by a C=C bond. A phosphorous ylide is used for this conversion. It is a neutral molecule where a positively charged phosphorous is attached to a negatively charged carbon atom.

Non-stabilized ylide (having electron donating group on negatively charged carbon) gives Z-isomer whereas stabilized ylide (having electron withdrawing group on negatively charged carbon) gives E-isomer.

Non–stabilized ylide (having electron donating group on negatively charged carbon) gives Z–isomer whereas stabilized ylide (having electron withdrawing group on negatively charged carbon) gives E–isomer.

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 18, Problem 18.54P

Interpretation Introduction