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Alkenes And Alkynes > Alkenes Reactions > Flashcards

Alkenes Reactions Flashcards

1
Q

How can an alkene produce a hologenoalkane

A

HX polar conditions or HX peroxides

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2
Q

What is the Markovnikov rule

A

The favoured product is the hydrogen attached to the least sub carbon

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3
Q

What sort of reaction is the addition of HX with peroxides

A

Free radical

Anti markovnikov

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4
Q

What forms a dibromoalkane from alkene

A

Br2

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5
Q

What addition is bromination

A

Anti

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6
Q

What does bromination produce a racemic mixture

A

The bromide ion can attack either side of the bromonium ion

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7
Q

What conditions form a bromohydrin from alkene

A

Br2/ H2o

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8
Q

What step is reversible in addition of bromine water

A

1st and 3 rd

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9
Q

How can an alcohol be formed from an alkene

A

Hydroxylation - H2o and acid catalyst
Oxymercuration - mercury accetate
Hydroboration - bh3, h2o2

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10
Q

Why is hydroxylation of alkene not the favoured method for producing an alcohol

A

All steps are reversible

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11
Q

In oxymercuration what is required at each step

A

Mercury acetate
Water
Sodium borahydride

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12
Q

What is the product of hydroboration

A

3 mol of alcohol from 3 mol of alkene and 1 mol bh3

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13
Q

What sort of addition is hydroboration

A

Anti markovnikov

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14
Q

At which carbon does the BH2 addition occur in hydroboration

A

The least hindered

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15
Q

What are the reagents for epoxidation

A

Percarboxylic acid and water and acid

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16
Q

What is formed in epoxidation

A

Trans diol

17
Q

What colour change is observed in dihydroxylation

A

Purple to brown +7 to +4

18
Q

What is the product of dihrdoxylation

A

Syn diol

19
Q

What are the reagents of dihydroxylation

A

KMnO4 and water

20
Q

What is another name for dihydroxylation

A

Baeyer test

21
Q

What is another reagent for dihydroxylation

A

OsO4 and NaHSO3

22
Q

What is the name of the intermediates produced in dihydroxylation

A

Manganate Ester and osmate ester

23
Q

What is the specificity / selectivity of dihydroxylation

A

Stereospecific

24
Q

What are the reagents of ozonlysis

A

O3 and Me2S

25
Q

What is the name of the ozonlysis mechanism

A

Criedge

26
Q

What sort of reaction is ozonlysis

A

1,3 dipolar addition

27
Q

What is the name of the intermediate in ozonlysis

A

Molozonide

28
Q

What is produced in ozonolysis

A

Me2SO and Cabonyls

29
Q

What sort of reaction is diels alder

A

4+2

30
Q

What are the reagents for Stille

A

Pd catalyst, tributyl tin and vinylbromide or bromobemzene

31
Q

What does Stille with bromobenzene give

A

The Br is replaced by the carbon chain

32
Q

What are the reagents of Suzuki

A

Pd boronic acid and bromoalkane

33
Q

What does the olefin reaction give

A

2 alkenes

Alkenes And Alkynes (5 decks)

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