3.3.4 - Alkenes Flashcards

1
Q

What are the two parts that make up double bond

A

Bond 1 = Covalent bond there are 2 electrons between C atoms

Bond 2= Pi bond formed from the overlap of P orbitals

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2
Q

What is stereoisomerism

A

Molecules with the same molecular and structural formula but with different arrangement of atoms

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3
Q

What are geometric isomers

A

Caused by molecules with a C=C with two different groups attached to each C

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4
Q

What are E-Z isomers

A

Geometric isomers were nothing can rotate around C=C

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5
Q

What are the CIP priority rules

A

E - if priority are on opposite sides

Z- if priority are on same side

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6
Q

What are structural isomers

A

Molecules with the same molecular formula but different structural formula

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7
Q

Three types of structural isomers

A

Chain isomers

Position isomers

Functional group isomers

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8
Q

What are chain isomers

A

Caused by having a different carbon chain

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9
Q

What are position isomers

A

Caused by functional groups being in a different position

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10
Q

What are functional group isomers

A

Caused having different functional groups

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11
Q

What are alkenes

A

Unsaturated hydrocarbons

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12
Q

What reactions can occur with alkenes

A

Electrophilic addition

Addition polymerisation

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13
Q

Why are they attacked by electrophiles

A

Have a high electron density because of double carbon bond

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14
Q

Electrophiles that work on alkenes

A

Br2
HBr
H2O
H2SO4

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15
Q

Draw the reaction between Br2 and a symmetrical alkene

A

Draw

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16
Q

Why can be Br2 be an electrophile

A

Because the double bond can induce a temporary dipole

17
Q

Draw an electrophilic addition between HBr and symmetrical alkenes

A

Draw

18
Q

Draw an electrophilic addition between unsymmetrical alkene

A

Draw

19
Q

What happens when unsymmetrical alkene undergo electrophilic addition

A

They produce a major and a minor product

20
Q

Draw what happens in electrophilic addition with H2SO4 with symmetrical alkenes

A

Draw

21
Q

What happens after electrophilic addition with H2SO4 has occurred

A

Hydrolysis which make it into a alcohol with H2SO4 t

22
Q

Draw What happens in electrophilic addition with a unsymmetrical alkene using H2SO4

A

Draw

23
Q

What is need to be with water for electrophilic addition to occur

A

H2O with the presence of a strong acid

24
Q

Draw what happen in electrophilic addition with H2O

A

Draw

25
Q

Explain what happen with alkenes for the order of formation

A

Carbon cations form in order of preference. The 3 carboncation is more stable than 2 carbon cation and is formed in preference

26
Q

What happens in the bromine test

A

Bromine water Turn orange to colourless in presence of alkene

27
Q

What is a polymer

A

Long chain molecules made from lots of small molecules joined together

28
Q

What is a monomer

A

Small molecules that join together to make polymers

29
Q

What is addition polymerisation

A

Formation of long chain molecules from lots of small molecules jointing together with no other product

30
Q

Draw PVC

A

Draw

31
Q

What is PVC proper name

A

Poly (chloroethene)

32
Q

What are the uses of polychloroethene

A

Window frames
Pipes
Clothing
Insulation in wires