EXP 4 REACTION OF ALIPHATIC AND AROMATIC HYDROCARBON

EXPERIMENT 4

REACTION OF ALIPHATIC &
AROMATIC HYDROCARBONS

Credit to:

RASHIQAH & SYAFEERA HUSNA ( B a t c h 2 0 2 0 /20 21),
NUR FARHANA & NURALISSA (Batch 2019/2020)

Lecturer: Pn Marziah binti Mohamad

KOLEJ MATRIKULASI MELAKA

OBJ E CT I V ES

Study the chemical properties of an alkane, alkene and
arene
Differentiate an alkane from an alkene and arene

CH3

CYCLOHEXANE CYCLOHEXENE TOLUENE

(aliphatic hydrocarbon) (aliphatic hydrocarbon) (aromatic hydrocarbon)

PROCEDURE

Link to video:
https://youtu.be/qdG4gOeVVWc

OBSERVATION

A) Reaction with bromine (Br2) in
dichloromethane (CH2Cl2)

A) Reaction with bromine (Br2) in dichloromethane (CH2Cl2)

BEFORE AFTER

OBS E RV A T I ON

F DB B (cyclohexane):

Reddish-brown colour of bromine decolorised

D (cyclohexene):

Reddish-brown colour of bromine decolorised

F (toluene):

Reddish-brown colour of bromine decolorised

UNDER SUNLIGHT

IN THE DARK PLACE

AC E

A (cyclohexane) C (cyclohexene) E (toluene)

Reddish-brown colour of Reddish-brown colour Reddish-brown colour of
bromine remain unchanged of bromine decolorised bromine remain unchanged

OBSERVATION

B) OXIDATION WITH COLD ALKALINE
SOLUTION OF KMnO4 (Baeyer’s test)

B) Oxidation with cold alkaline solution KMnO4 (Baeyer's Test)

G

cyclohexane

Purple colour of

KMnO4 remain
unchanged. No

pricipitate formed.

BEFORE AFTER

H

cyclohexene

Purple colour of

KMnO4 decolorised.
Brown pricipitate

formed

BEFORE AFTER

I Purple colour of

Toluene KMnO4 remain
unchanged. No
BEFORE
pricipitate

formed.

AFTER

THANK YOU