IUPAC name of the given alkene has to be given and the configuration has to be specified by the E, Z system. Concept Introduction: IUPAC nomenclature : • Name the main chain: Find the longest carbon chain and name the chain according to the number of carbon atoms it contains; is also the suffix part of the name. • Number the carbon atoms in the main chain: The carbons are numbered, in which the substituents must get lowest possible numbers. • Identify the substituents, and number each: The number at where substituents are present has to be noted. The substituents written as prefix. • Write the names as a single word: Use the hyphen to separate the numbers from the different prefix; commas to separate numbers. If two or more different substituents are present, arrange them in alphabetical order. If two or more identical substituents are present, use prefixes di-, tri-, tetra-, but this particular prefix should not be used for alphabetizing purpose. 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. 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

Five isomeric alkanes (A–E) having the molecular formula C6H14 are each treated with Cl2 + hv to give alkyl halides having molecular formulaC6H13Cl. A yields five constitutional isomers. B yields four constitutionalisomers. C yields two constitutional isomers. D yields threeconstitutional isomers, two of which possess stereogenic centers. Eyields three constitutional isomers, only one of which possesses astereogenic center. Identify the structures of A–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 5.5P

(a)

Interpretation Introduction

Interpretation:

IUPAC name of the given alkene has to be given and the configuration has to be specified by the E, Z system.

Concept Introduction:

IUPAC nomenclature:

• Name the main chain: Find the longest carbon chain and name the chain according to the number of carbon atoms it contains; is also the suffix part of the name.

• Number the carbon atoms in the main chain: The carbons are numbered, in which the substituents must get lowest possible numbers.

• Identify the substituents, and number each: The number at where substituents are present has to be noted. The substituents written as prefix.

• Write the names as a single word: Use the hyphen to separate the numbers from the different prefix; commas to separate numbers. If two or more different substituents are present, arrange them in alphabetical order. If two or more identical substituents are present, use prefixes di-, tri-, tetra-, but this particular prefix should not be used for alphabetizing purpose.

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.

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.

(b)

Interpretation Introduction

Interpretation:

IUPAC name of the given alkene has to be given and the configuration has to be specified by the E, Z system.

Concept Introduction:

IUPAC nomenclature:

• Name the main chain: Find the longest carbon chain and name the chain according to the number of carbon atoms it contains; is also the suffix part of the name.

• Number the carbon atoms in the main chain: The carbons are numbered, in which the substituents must get lowest possible numbers.

• Identify the substituents, and number each: The number at where substituents are present has to be noted. The substituents written as prefix.

• Write the names as a single word: Use the hyphen to separate the numbers from the different prefix; commas to separate numbers. If two or more different substituents are present, arrange them in alphabetical order. If two or more identical substituents are present, use prefixes di-, tri-, tetra-, but this particular prefix should not be used for alphabetizing purpose.

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.

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.

(c)

Interpretation Introduction

Interpretation:

IUPAC name of the given alkene has to be given and the configuration has to be specified by the E, Z system.

Concept Introduction:

IUPAC nomenclature:

• Name the main chain: Find the longest carbon chain and name the chain according to the number of carbon atoms it contains; is also the suffix part of the name.

• Number the carbon atoms in the main chain: The carbons are numbered, in which the substituents must get lowest possible numbers.

• Identify the substituents, and number each: The number at where substituents are present has to be noted. The substituents written as prefix.

• Write the names as a single word: Use the hyphen to separate the numbers from the different prefix; commas to separate numbers. If two or more different substituents are present, arrange them in alphabetical order. If two or more identical substituents are present, use prefixes di-, tri-, tetra-, but this particular prefix should not be used for alphabetizing purpose.

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.

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

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 5.5P

(a)

Interpretation Introduction

Interpretation:

IUPAC name of the given alkene has to be given and the configuration has to be specified by the E, Z system.

Concept Introduction:

IUPAC nomenclature:

• Name the main chain: Find the longest carbon chain and name the chain according to the number of carbon atoms it contains; is also the suffix part of the name.

• Number the carbon atoms in the main chain: The carbons are numbered, in which the substituents must get lowest possible numbers.

• Identify the substituents, and number each: The number at where substituents are present has to be noted. The substituents written as prefix.

• Write the names as a single word: Use the hyphen to separate the numbers from the different prefix; commas to separate numbers. If two or more different substituents are present, arrange them in alphabetical order. If two or more identical substituents are present, use prefixes di-, tri-, tetra-, but this particular prefix should not be used for alphabetizing purpose.

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.

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.

(b)

Interpretation Introduction

Interpretation:

IUPAC name of the given alkene has to be given and the configuration has to be specified by the E, Z system.

Concept Introduction:

IUPAC nomenclature:

• Name the main chain: Find the longest carbon chain and name the chain according to the number of carbon atoms it contains; is also the suffix part of the name.

• Number the carbon atoms in the main chain: The carbons are numbered, in which the substituents must get lowest possible numbers.

• Identify the substituents, and number each: The number at where substituents are present has to be noted. The substituents written as prefix.

• Write the names as a single word: Use the hyphen to separate the numbers from the different prefix; commas to separate numbers. If two or more different substituents are present, arrange them in alphabetical order. If two or more identical substituents are present, use prefixes di-, tri-, tetra-, but this particular prefix should not be used for alphabetizing purpose.

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.

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.

(c)

Interpretation Introduction

Interpretation:

IUPAC name of the given alkene has to be given and the configuration has to be specified by the E, Z system.

Concept Introduction:

IUPAC nomenclature:

• Name the main chain: Find the longest carbon chain and name the chain according to the number of carbon atoms it contains; is also the suffix part of the name.

• Number the carbon atoms in the main chain: The carbons are numbered, in which the substituents must get lowest possible numbers.

• Identify the substituents, and number each: The number at where substituents are present has to be noted. The substituents written as prefix.

• Write the names as a single word: Use the hyphen to separate the numbers from the different prefix; commas to separate numbers. If two or more different substituents are present, arrange them in alphabetical order. If two or more identical substituents are present, use prefixes di-, tri-, tetra-, but this particular prefix should not be used for alphabetizing purpose.

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.

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 5.5P

(a)

Interpretation Introduction

Interpretation:

IUPAC name of the given alkene has to be given and the configuration has to be specified by the E, Z system.

Concept Introduction:

IUPAC nomenclature:

• Name the main chain: Find the longest carbon chain and name the chain according to the number of carbon atoms it contains; is also the suffix part of the name.

• Number the carbon atoms in the main chain: The carbons are numbered, in which the substituents must get lowest possible numbers.

• Identify the substituents, and number each: The number at where substituents are present has to be noted. The substituents written as prefix.

• Write the names as a single word: Use the hyphen to separate the numbers from the different prefix; commas to separate numbers. If two or more different substituents are present, arrange them in alphabetical order. If two or more identical substituents are present, use prefixes di-, tri-, tetra-, but this particular prefix should not be used for alphabetizing purpose.

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.

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.

(b)

Interpretation Introduction

Interpretation:

IUPAC name of the given alkene has to be given and the configuration has to be specified by the E, Z system.

Concept Introduction:

IUPAC nomenclature:

• Name the main chain: Find the longest carbon chain and name the chain according to the number of carbon atoms it contains; is also the suffix part of the name.

• Number the carbon atoms in the main chain: The carbons are numbered, in which the substituents must get lowest possible numbers.

• Identify the substituents, and number each: The number at where substituents are present has to be noted. The substituents written as prefix.

• Write the names as a single word: Use the hyphen to separate the numbers from the different prefix; commas to separate numbers. If two or more different substituents are present, arrange them in alphabetical order. If two or more identical substituents are present, use prefixes di-, tri-, tetra-, but this particular prefix should not be used for alphabetizing purpose.

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.

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.

(c)

Interpretation Introduction

Interpretation:

IUPAC name of the given alkene has to be given and the configuration has to be specified by the E, Z system.

Concept Introduction:

IUPAC nomenclature:

• Name the main chain: Find the longest carbon chain and name the chain according to the number of carbon atoms it contains; is also the suffix part of the name.

• Number the carbon atoms in the main chain: The carbons are numbered, in which the substituents must get lowest possible numbers.

• Identify the substituents, and number each: The number at where substituents are present has to be noted. The substituents written as prefix.

• Write the names as a single word: Use the hyphen to separate the numbers from the different prefix; commas to separate numbers. If two or more different substituents are present, arrange them in alphabetical order. If two or more identical substituents are present, use prefixes di-, tri-, tetra-, but this particular prefix should not be used for alphabetizing purpose.

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.

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

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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 5.5P

(a)

Interpretation Introduction