Structural formulas for other two stereoisomers of 2,4-heptadiene has to be drawn. Concept Introduction: IUPAC nomenclature : Alkene: Unsaturated hydrocarbons having at least one double bond between two carbon atoms are known as alkenes . The systematic name of alkenes are written by replacing “ane” of alkane with the suffix name “ene”. Numbering of the main chain should be in such away that alkene group must get lowest possible numbers. Trans configuration: In trans configuration, high priority groups are placed on opposite sides of the double bond. Cis configuration: In cis configuration, high priority groups are placed on same sides of the double bond. E configuration: The geometric isomers are given E configuration if high priority groups are placed on opposite sides of the bond. Z configuration: The geometric isomers are given Z configuration if high priority groups are placed on same sides of the bond.

Question

6 Which of the following are likely to be significant resonance structures of a resonance hybrid? Draw another resonance structure for each of the compounds you select as being a resonance form. (A Br: Br: A B C D E

Answer 1

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Definition Definition Molecules that have multiple bonds between their carbon atoms. Alkenes are hydrocarbons with a double bond between two adjacent carbon atoms (R 2 C=CR 2 ), whereas alkynes are hydrocarbons with a triple bond between two adjacent carbon atoms R-C=C-R . These two groups are known as unsaturated hydrocarbons. They have fewer hydrogen atoms when compared with alkanes with same number of carbon atoms. The general molecular formula for an unsaturated hydrocarbon can be represented as C n H 2n +2 .

Chapter 5.2, Problem 5.7P

Interpretation Introduction

Interpretation:

Structural formulas for other two stereoisomers of 2,4-heptadiene has to be drawn.

Concept Introduction:

IUPAC nomenclature:

Alkene: Unsaturated hydrocarbons having at least one double bond between two carbon atoms are known as alkenes.

The systematic name of alkenes are written by replacing “ane” of alkane with the suffix name “ene”. Numbering of the main chain should be in such away that alkene group must get lowest possible numbers.

Trans configuration: In trans configuration, high priority groups are placed on opposite sides of the double bond.

Cis configuration: In cis configuration, high priority groups are placed on same sides of the double bond.

E configuration: The geometric isomers are given E configuration if high priority groups are placed on opposite sides of the bond.

Z configuration: The geometric isomers are given Z configuration if high priority groups are placed on same sides of the bond.

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Answer 2

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Definition Definition Molecules that have multiple bonds between their carbon atoms. Alkenes are hydrocarbons with a double bond between two adjacent carbon atoms (R 2 C=CR 2 ), whereas alkynes are hydrocarbons with a triple bond between two adjacent carbon atoms R-C=C-R . These two groups are known as unsaturated hydrocarbons. They have fewer hydrogen atoms when compared with alkanes with same number of carbon atoms. The general molecular formula for an unsaturated hydrocarbon can be represented as C n H 2n +2 .

Chapter 5.2, Problem 5.7P

Interpretation Introduction

Interpretation:

Structural formulas for other two stereoisomers of 2,4-heptadiene has to be drawn.

Concept Introduction:

IUPAC nomenclature:

Alkene: Unsaturated hydrocarbons having at least one double bond between two carbon atoms are known as alkenes.

The systematic name of alkenes are written by replacing “ane” of alkane with the suffix name “ene”. Numbering of the main chain should be in such away that alkene group must get lowest possible numbers.

Trans configuration: In trans configuration, high priority groups are placed on opposite sides of the double bond.

Cis configuration: In cis configuration, high priority groups are placed on same sides of the double bond.

E configuration: The geometric isomers are given E configuration if high priority groups are placed on opposite sides of the bond.

Z configuration: The geometric isomers are given Z configuration if high priority groups are placed on same sides of the bond.

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Answer 3

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Definition Definition Molecules that have multiple bonds between their carbon atoms. Alkenes are hydrocarbons with a double bond between two adjacent carbon atoms (R 2 C=CR 2 ), whereas alkynes are hydrocarbons with a triple bond between two adjacent carbon atoms R-C=C-R . These two groups are known as unsaturated hydrocarbons. They have fewer hydrogen atoms when compared with alkanes with same number of carbon atoms. The general molecular formula for an unsaturated hydrocarbon can be represented as C n H 2n +2 .

Chapter 5.2, Problem 5.7P

Interpretation Introduction

Interpretation:

Structural formulas for other two stereoisomers of 2,4-heptadiene has to be drawn.

Concept Introduction:

IUPAC nomenclature:

Alkene: Unsaturated hydrocarbons having at least one double bond between two carbon atoms are known as alkenes.

The systematic name of alkenes are written by replacing “ane” of alkane with the suffix name “ene”. Numbering of the main chain should be in such away that alkene group must get lowest possible numbers.

Trans configuration: In trans configuration, high priority groups are placed on opposite sides of the double bond.

Cis configuration: In cis configuration, high priority groups are placed on same sides of the double bond.

E configuration: The geometric isomers are given E configuration if high priority groups are placed on opposite sides of the bond.

Z configuration: The geometric isomers are given Z configuration if high priority groups are placed on same sides of the bond.

Expert Solution & Answer

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Answer 4

Question

100%

Definition Definition Molecules that have multiple bonds between their carbon atoms. Alkenes are hydrocarbons with a double bond between two adjacent carbon atoms (R 2 C=CR 2 ), whereas alkynes are hydrocarbons with a triple bond between two adjacent carbon atoms R-C=C-R . These two groups are known as unsaturated hydrocarbons. They have fewer hydrogen atoms when compared with alkanes with same number of carbon atoms. The general molecular formula for an unsaturated hydrocarbon can be represented as C n H 2n +2 .

Chapter 5.2, Problem 5.7P

Interpretation Introduction