The pi-electron energies of a cyclic and an open-chain compound are to be explained. Concept introduction: A cyclic molecule containing a 4n π -electron system, not following Huckel’s rule ( 4 n + 2 ) , is known as an antiaromatic molecule. A cyclic molecule containing a π -electron system, following Huckel’s rule ( 4 n + 2 ) , is known as an aromatic molecule.

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Answer 1

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Definition Definition Rule that estimates whether a given organic planar ring structure will show an aromatic property. A cyclic ring molecule is said to follow Hückel’s rule if the л-electrons count in a molecule is [4n+2], where n stands for a positive numerical value. It is also called the [4n+2] rule. Hückel's rule, sometimes referred to as the aromaticity rule, is one but not the only criteria to judge a molecule for aromaticity.

Chapter 14, Problem 8PP

Interpretation Introduction

Interpretation:

The pi-electron energies of a cyclic and an open-chain compound are to be explained.

Concept introduction:

A cyclic molecule containing a 4n π-electron system, not following Huckel’s rule (4n+2), is known as an antiaromatic molecule.

A cyclic molecule containing a π-electron system, following Huckel’s rule (4n+2), is known as an aromatic molecule.

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A student was given from the list of the compounds below A, B and D blindly and asked to identify them all. He treated each of them with Brady's reagent (2,4-ditrophenylhydrazine) and isolated a bright yellow compound for one of them, but the other two gave false negatives. The student reasoned that the false negatives may be due to sterics and, on further thinking, it dawned on him that he might be able to rule out one of the false negatives with the haloform test. What compound did he find compatible with the haloform test? That compound did indeed give a false negative in the Brady test. Which of the other two was positive in the Brady test? A = haloform B = Brady A = haloform D = Brady B = haloform A = Brady B = haloform D = Brady D = haloform A = Brady D = haloform B = Brady

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Answer 2

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Definition Definition Rule that estimates whether a given organic planar ring structure will show an aromatic property. A cyclic ring molecule is said to follow Hückel’s rule if the л-electrons count in a molecule is [4n+2], where n stands for a positive numerical value. It is also called the [4n+2] rule. Hückel's rule, sometimes referred to as the aromaticity rule, is one but not the only criteria to judge a molecule for aromaticity.

Chapter 14, Problem 8PP

Interpretation Introduction

Interpretation:

The pi-electron energies of a cyclic and an open-chain compound are to be explained.

Concept introduction:

A cyclic molecule containing a 4n π-electron system, not following Huckel’s rule (4n+2), is known as an antiaromatic molecule.

A cyclic molecule containing a π-electron system, following Huckel’s rule (4n+2), is known as an aromatic molecule.

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Answer 3

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Definition Definition Rule that estimates whether a given organic planar ring structure will show an aromatic property. A cyclic ring molecule is said to follow Hückel’s rule if the л-electrons count in a molecule is [4n+2], where n stands for a positive numerical value. It is also called the [4n+2] rule. Hückel's rule, sometimes referred to as the aromaticity rule, is one but not the only criteria to judge a molecule for aromaticity.

Chapter 14, Problem 8PP

Interpretation Introduction

Interpretation:

The pi-electron energies of a cyclic and an open-chain compound are to be explained.

Concept introduction:

A cyclic molecule containing a 4n π-electron system, not following Huckel’s rule (4n+2), is known as an antiaromatic molecule.

A cyclic molecule containing a π-electron system, following Huckel’s rule (4n+2), is known as an aromatic molecule.

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 4

Question

Definition Definition Rule that estimates whether a given organic planar ring structure will show an aromatic property. A cyclic ring molecule is said to follow Hückel’s rule if the л-electrons count in a molecule is [4n+2], where n stands for a positive numerical value. It is also called the [4n+2] rule. Hückel's rule, sometimes referred to as the aromaticity rule, is one but not the only criteria to judge a molecule for aromaticity.

Chapter 14, Problem 8PP

Interpretation Introduction