Transcript Chemical Reactions of Alkanes and Alkenes Structure cyclohexane cyclohexene CH2 CH2 H2C CH2 CH2 HC H2C HC CH2 CH2 CH2 CH2 H H H H H C H H H C H C C H C C H H C C H C C H C H H H H H C H H H Solubility H2SO4 & H2O Br2 before after KMnO4 before after Cyclohexane insoluble No reaction Orange Orange Purple Purple Cyclohexene insoluble Cloudy, warm Orange Colourless Purple Brown.

Chemical Reactions of
Alkanes and Alkenes
Structure
cyclohexane
cyclohexene
CH2
CH2
H2C
CH2
CH2
HC
H2C
HC
CH2
CH2
CH2
CH2
H
H
H
H
H
C
H
H
H
C
H
C
C
H
C
C
H
H
C
C
H
C
C
H
C
H
H
H
H
H
C
H
H
H
Solubility
H2SO4 & H2O
Br2 before
after
KMnO4 before
after
Cyclohexane
insoluble
No reaction
Orange
Orange
Purple
Purple
Cyclohexene
insoluble
Cloudy, warm
Orange
Colourless
Purple
Brown
1. Low. Low.
H H
H
H
2. Saturated: all single bonds,
C
H C
C H
Unsaturated: has multiple bonds
H C
C H
3. Cyclohexane, saturated
C
H
H
Cyclohexene, unsaturated
H H
4. Alkanes: non, alkenes: most *not benzene H H
H
C
H
5. a) Orange b) Addition
H C
C
H
H
H H
c) H
H
H
H C
C
C
C
H
H
C
C
H
C
C
C
H
H
+
H
H
H
C
C
Br
H
C
C
Br
Br Br
C
H
H
C
H
H
H
H
H
H
d) Br2 is orange. It (and it’s colour) is used up
in the reaction with cycloalkene
e) One mole of ethyne
Cyclohexene + H2SO4 + H2O
H
H
C
C
C
H
C
C
C
H
H
H
H
H
H
H
+
H
H
H2O
H
H
C
catalyst H
C
C
OH
H
C
C
H
C
H
H
H
H
cyclohexanol
Found in water because it can form hydrogen
bonds with water (it is polar)
Cyclohexene + KMnO4
H
H
C
C
C
H
C
C
C
H
H
H
H
H
H
H
+
H
H
H
H
C
KMnO4
H
C
C
OH
H2O
H
C
C
OH
C
H
H
H
H
+ KOH + MnO2
For more lessons, visit
www.chalkbored.com