Addition and Elimination Reactions (OChem)

organic reactions
there are hundreds of reactions that allow us to
manipulate organic compounds
organic
Addition Reactions double bond broken elements added
:
1. alkenes , ,
new

↳ unsaturated → saturated
it addition of
hydrogenation Hug]
-




alkene t
Hz →
alkane +
Hz →


but 1- em -

+ Hz →
butane

Cha =
CH -


Ctlz -


Ctb
+
Hz →
( th -


CH -




Ctlz -

CH }
Ii) addition of Xz
a
halogenation
-




+
Xz halide
+
Ck →

pent -

2- ene +
HOH z alkene →
alkyl a
in this can happen
pent an -1-01 1-
pent an -2.01 alkynes , twice

+
Hz →
+
Hz →



2- + 2-1-2
pent yne
- a

-




Clz →
tclz → a
"



☒ -1
I -
I a "
c,

Iii ) hydrohalogenation
-

add hydrogen halide

↳
☒
but -


1- ene +
HCl →
2- chloro butane + 1- chloro butane
"

7
t HCl t

T
a
results in two products
butane t treat
alkyl halides)
butan -2-01%0 "
iii
) dehydration 1 alcohol >
alkene in sulfuric acid )
iv ) add
hydration HOH
-




but -

l -



em t HOH → but an -2-01 +
but an -

I -01
OH
1- HOH →


OH
2. Elimination Reactions reverse create alkene / alkyne
:


,

it
cracking / dehydrogenation (alkane →
alkene +
Hugs)
CH } -




Ctb %t CH , =
(Hz t
1-12191
ii) denalogenation talky halide → alkene)


2 H
É É -
-
-


H + 201-1
-




→ 2 cHz=CHz + act
-




+2K¥
I 1
add strong byproducts
H c,

basf
F it
.
.




sulfuric acid

H -

C -

C -

H > CHA -
CHA +
HOH
ti dit