Summary
Summary Reactions and mechanisms in alkenes
- Module
- Unit 6 - Organic Chemistry I
- Institution
- PEARSON (PEARSON)
Reactions and mechanisms in alkenes
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Reactions in AlkenesADDITION REACTIONS
When an alkene reacts , usually the double bond breaks
to form two
single bonds .
↳ c- C bond remains but the pi
the Sigma unchanged ,
electrons are used to form new bonds .
HALOGEN ATION
C2H , t Bra →
C2H4BR≥
this tests for a double bond
since the bromine water turns
colourless if a double bond is
present .
H H
" "
H
'
I =L
'
H
t Brz →
µ -
¢ -
E
l
- H
Br Br
: bromine water
reagent
◦
.
• conditions : RTP, alkene dissolved in
solvent
in her
•
product : di bromo alkane
•
reaction type : electrophilic addition .
HYDROGENATION
•
forms an alkane from an
alkene
◦
nickel catalyst
It It
" "
I
&
'
I = c t H, H - - -
H
H
' '
H H H
to them
•
used in industry unsaturated
( liquid ) fats to saturated ( solid ) fats .
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