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Organic Chemistry: Reactions and Stereoisomers

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Organic Chemistry: Reactions and Stereoisomers

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Questions and Answers

Which of the following statements correctly describes the elimination reaction of 2-bromopentane to form pent-2-ene?

It is classified as an addition reaction.

It results in the formation of a racemic mixture.

It is a B-Elimination reaction. (correct)

It follows the non-Zaitsev rule.

Which type of isomer are the two possible stereo-structures of CH3CHOHCOOH that are optically active?

Meso compounds

Atropisomers

Enantiomers (correct)

Conformers

In an S_N2 reaction on chiral centers, what is typically observed?

Partial racemisation

Only retention of configuration

No change in chirality

100% inversion of configuration (correct)

What is the characteristic feature of a dehydrohalogenation reaction?

<p>Elimination of hydrogen and halogen</p> Signup and view all the answers

Which of these reactions does NOT characterize the transformation of 2-bromopentane to pent-2-ene?

<p>Nucleophilic substitution reaction</p> Signup and view all the answers

Study Notes

Elimination reaction of 2-bromopentane

The elimination reaction of 2-bromopentane to form pent-2-ene is a β-elimination reaction.
It follows the Zaitsev rule, which states that the more substituted alkene is the major product.
The reaction is a dehydrohalogenation reaction, a type of elimination reaction where a hydrogen halide is removed from a molecule.

Stereoisomers of CH3CHOHCOOH

Two possible stereoisomers of CH3CHOHCOOH, which are optically active, are called enantiomers.
Enantiomers are stereoisomers that are non-superimposable mirror images of each other.

SN2 reaction on chiral centres

In an SN2 reaction on chiral centres, there is inversion more than retention leading to partial racemization.
This means that the product will be a mixture of both enantiomers, with the inverted product being the major product.

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Description

This quiz covers important organic reactions including elimination, stereoisomers, and SN2 reactions. Understand the principles of β-elimination, the Zaitsev rule, and the characteristics of enantiomers. Test your knowledge on chiral centers and product outcomes in these reactions.