The structural formula for 1,3-dichlorobenzene has to be drawn. Concept introduction: A benzene ring has six carbon atoms which are sp 2 hybridized and one hydrogen atom attached to each carbon atom thus total six hydrogens are present in benzene ring. Benzene is known as an aromatic compound as it obeys Huckel’s aromaticity rules. The structure of the benzene derivative when one or more hydrogen atoms are replaced by other groups, can be drawn as follows, The systematic name for the benzene derivatives is written by taking the parent name benzene and all the substituent come in the prefix.

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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 23, Problem 31PS

(a)

Interpretation Introduction

Interpretation: The structural formula for 1,3-dichlorobenzene has to be drawn.

Concept introduction:

A benzene ring has six carbon atoms which are sp2 hybridized and one hydrogen atom attached to each carbon atom thus total six hydrogens are present in benzene ring. Benzene is known as an aromatic compound as it obeys Huckel’s aromaticity rules.

The structure of the benzene derivative when one or more hydrogen atoms are replaced by other groups, can be drawn as follows,

The systematic name for the benzene derivatives is written by taking the parent name benzene and all the substituent come in the prefix.

(b)

Interpretation Introduction

Interpretation: The structural formula for 1-bromo-4-methylbenzene has to be drawn.

Concept introduction: A benzene ring has six carbon atoms which are sp2 hybridized and one hydrogen atom attached to each carbon atom thus total six hydrogens are present in benzene ring. Benzene is known as an aromatic compound as it obeys Huckel’s aromaticity rules.

The structure of the benzene derivative when one or more hydrogen atoms are replaced by other groups, can be drawn as follows,

The systematic name for the benzene derivatives is written by taking the parent name benzene and all the substituent come in the prefix.

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Technetium is the first element in the periodic chart that does not have any stable isotopes. Technetium-99m is an especially interesting and valuable isotope as it emits a gamma ray with a half life ideally suited for medical tests. It would seem that the decay of technetium should fit the treatment above with the result In(c/c) = -kt. The table below includes data from the two sites: http://dailymed.nlm.nih.gov/dailymed/druginfo.cfm?id=7130 http://wiki.medpedia.com/Clinical: Neutrospec_(Technetium_(99m Tc)_fanolesomab). a. b. C. Graph the fraction (c/c.) on the vertical axis versus the time on the horizontal axis. Also graph In(c/c.) on the vertical axis versus time on the horizontal axis. When half of the original amount of starting material has hours fraction remaining disappeared, c/c = ½ and the equation In(c/c.) = -kt becomes In(0.5) = -kt1/2 where t₁₂ is the half life (the time for half of the material to decay away). Determine the slope of your In(c/c.) vs t graph and…

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1. a) Assuming that an atom of arsenic has hydrogen-like atomic orbitals, sketch the radial probability plots for 4p and 4d orbitals of S atom. Indicate angular and radial nodes in these orbitals. (4 points) b) Calculate Zeff experienced by and electron in 4p AO's in a arsenic atom. Use Slater rules that were discussed in lecture. (3 points)

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 23, Problem 31PS

(a)

Interpretation Introduction

Interpretation: The structural formula for 1,3-dichlorobenzene has to be drawn.

Concept introduction:

A benzene ring has six carbon atoms which are sp2 hybridized and one hydrogen atom attached to each carbon atom thus total six hydrogens are present in benzene ring. Benzene is known as an aromatic compound as it obeys Huckel’s aromaticity rules.

The structure of the benzene derivative when one or more hydrogen atoms are replaced by other groups, can be drawn as follows,

The systematic name for the benzene derivatives is written by taking the parent name benzene and all the substituent come in the prefix.

(b)

Interpretation Introduction

Interpretation: The structural formula for 1-bromo-4-methylbenzene has to be drawn.

Concept introduction: A benzene ring has six carbon atoms which are sp2 hybridized and one hydrogen atom attached to each carbon atom thus total six hydrogens are present in benzene ring. Benzene is known as an aromatic compound as it obeys Huckel’s aromaticity rules.

The structure of the benzene derivative when one or more hydrogen atoms are replaced by other groups, can be drawn as follows,

The systematic name for the benzene derivatives is written by taking the parent name benzene and all the substituent come in the prefix.

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Answer 3

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 23, Problem 31PS

(a)

Interpretation Introduction

Interpretation: The structural formula for 1,3-dichlorobenzene has to be drawn.

Concept introduction:

A benzene ring has six carbon atoms which are sp2 hybridized and one hydrogen atom attached to each carbon atom thus total six hydrogens are present in benzene ring. Benzene is known as an aromatic compound as it obeys Huckel’s aromaticity rules.

The structure of the benzene derivative when one or more hydrogen atoms are replaced by other groups, can be drawn as follows,

The systematic name for the benzene derivatives is written by taking the parent name benzene and all the substituent come in the prefix.

(b)

Interpretation Introduction

Interpretation: The structural formula for 1-bromo-4-methylbenzene has to be drawn.

Concept introduction: A benzene ring has six carbon atoms which are sp2 hybridized and one hydrogen atom attached to each carbon atom thus total six hydrogens are present in benzene ring. Benzene is known as an aromatic compound as it obeys Huckel’s aromaticity rules.

The structure of the benzene derivative when one or more hydrogen atoms are replaced by other groups, can be drawn as follows,

The systematic name for the benzene derivatives is written by taking the parent name benzene and all the substituent come in the prefix.

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Answer 4

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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 23, Problem 31PS

(a)

Interpretation Introduction