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Electrophilic addition reaction

Electrophilic addition reaction

LC2.5.1.1

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Description

In an addition reaction in organic chemistry, 2 or more molecules are joined together. This follows the scheme A + B → C. A distinction is made between a nucleophilic and an electrophilic addition reaction. The term nucleophilic or electrophilic refers to the molecule or atom that attacks the carbon chain.

In this experiment, bromine is used as an electrophile to add to the double bond of cyclohexene. The students can see from the decolourisation of the solutions that an electrophilic addition reaction only takes place when bromine comes into contact with a molecule with a double bond.

Components of equipment sets

1	6710340 4	Bromide/Bromate solution, 250 ml Danger H350
1	6747920 4	Sulfuric acid, diluted, approx. 2 N (= 10 %), 500 ml Warning H290 H315 H319
1	6738010 4	Sodium thiosulfate-5-hydrate, 250 g
1	6753410 4	Water, pure, 5 l
1	30945 4	Universal pencil
1	667057 4	Test tube rack metal, 20 mm Ø
3	6659531 4	Dropping pipette 150 mm x 7 mm Ø
3	6659541 8	Rubber bulb
1	665997 4	Graduated pipette 10 ml
1	666003 4	Pipetting ball (Peleus ball)
3	6640421 4	Test tube Fiolax 16 mm x 160 mm
1	602022 4	Beaker Boro 3.3, 100 ml, squat
1	610010 8	Laboratory safety goggles
1	667609 4	Safety gloves, nitrile rubber, size 8
1	6715700 4	Cyclohexane, 250 ml Danger H225 H304 H410 H315 H336
1	6715910 4	Cyclohexene, 100 ml Danger H225 H302 H304 H411

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Electrophilic addition reaction

Description

Components of equipment sets

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