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Chemistry > Alkenes > Flashcards

Alkenes Flashcards

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1
Q

What is the general formula for an Alkene?

A

CnH2n

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2
Q

What bonds are found in a C=C in an Alkene?

A

Pi bonds

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3
Q

How is a Pi bond formed and how does it differ from a sigma bond?

A

Pi bonds are formed when P orbitals overlap side by side

They can’t rotate

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4
Q

What is a structural isomer?

A

They have the same molecular formula but different structural formula

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5
Q

What is a stereoisomer?

A

Same structural formula but different arrangement in space

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6
Q

What is E isomerism?

A

The 2 priority groups are on different sides

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7
Q

What is Z isomerism?

A

The 2 priority groups are on the same side of the double bond

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8
Q

What is cis isomerism?

A

2 priority groups that are identical on the same side

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9
Q

What is trans isomerism?

A

2 priority groups that are identical on different sides

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10
Q

What is the reaction called when alkenes react with hydrogen?

A

Hydrogenation

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11
Q

What is formed in hydrogenation

A

Alkane

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12
Q

What are the reaction conditions of hydrogenation?

A

Nickel catalyst
150 degrees
60 atmos

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13
Q

What is it called when you react and Alkene and a halogen?

A

Halogenation

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14
Q

What is formed in halogenation?

A

Dihaloalkane

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15
Q

How can halogenation be used to test for unsaturation?

A

Orange bromine solution will turn colourless in the presence of an unsaturated Alkane

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16
Q

What is the general formula for an Alkene?

A

CnH2n

17
Q

What bonds are found in a C=C in an Alkene?

A

Pi bonds

18
Q

How is a Pi bond formed and how does it differ from a sigma bond?

A

Pi bonds are formed when P orbitals overlap side by side

They can’t rotate

19
Q

What is a structural isomer?

A

They have the same molecular formula but different structural formula

20
Q

What is a stereoisomer?

A

Same structural formula but different arrangement in space

21
Q

What is E isomerism?

A

The 2 priority groups are on different sides

22
Q

What is Z isomerism?

A

The 2 priority groups are on the same side of the double bond

23
Q

What is cis isomerism?

A

2 priority groups that are identical on the same side

24
Q

What is trans isomerism?

A

2 priority groups that are identical on different sides

25
Q

What is the reaction called when alkenes react with hydrogen?

A

Hydrogenation

26
Q

What is formed in hydrogenation

A

Alkane

27
Q

What are the reaction conditions of hydrogenation?

A

Nickel catalyst
150 degrees
60 atmos

28
Q

What is it called when you react and Alkene and a halogen?

A

Halogenation

29
Q

What is formed in halogenation?

A

Dihaloalkane

30
Q

How can halogenation be used to test for unsaturation?

A

Orange bromine solution will turn colourless in the presence of an unsaturated Alkane

Chemistry (15 decks)

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