CLASS - 2
ALKANES
• Preparations-II
• Physical Properties
• Chemical Properties-I
, Preparation Of Alkanes (RH)
1. From Alkenes & Alkynes
2. From Alkyl Halides
(a) Reduction (b) Wurtz Reaction
(c) Frankland Reaction (d) Corey House Synthesis
(e) From Grignard Reagent
3. Reduction Of Oxygen Containing Compounds
(a) Aldehydes & Ketones (b) Carboxylic Acids (c) Alcohols
4. From Salts Of Carboxylic Acids
(a) Decarboxylation (b) Kolbe’s Electrolysis
5. From Metal Carbides (Only Methane)
ₕydᵣₒcₐᵣbₒₙₛ C̲ i ̲r ̲c̲l ̲e̲
,Revisiting Corey -
House synthesis :
'
1 hi R' ✗ R R
RX Rzculi +
. -
2- CUI
⇐ ilmann's
reagent)
Halide 1 Halide
org
2
org
.
. . .
I
Alkyl i 1° Alkyl
can be
can only be ,
-
CH
}
CCH] , 1°, 2339 2°
cyclo alkyl
cydoakyl ; phenyl can be phenyl but reaction is
(2939 Very slow
( so not a
good method
Note : Hence the given example is not formed in a
good
yield using Corey House method
CHICHI
-
.
ₕydᵣₒcₐᵣbₒₙₛ C̲ i ̲r ̲c̲l ̲e̲
, (e) From Grignard Reagent RMGX ; ✗ f- F
Preparation :
•+ g- Mezo 8- St
R
R X +
Mg MgBr
-
-
dry
• ✗ IF ether
. ease
of formation : RI > R Br > RCI RF
8- St
Ngt
-
covalent ←
R -
-
✗
→ ionic bond
bond
2 → acts as a carbanion
when it pulls out an .
When it acidic atom ; it
H -
cs
said to act as
Shares / gives
its Bronsted Base
away e- cloud
to others ,
it is
said to act as
Nucleophile
ₕydᵣₒcₐᵣbₒₙₛ C̲ i ̲r ̲c̲l ̲e̲
ALKANES
• Preparations-II
• Physical Properties
• Chemical Properties-I
, Preparation Of Alkanes (RH)
1. From Alkenes & Alkynes
2. From Alkyl Halides
(a) Reduction (b) Wurtz Reaction
(c) Frankland Reaction (d) Corey House Synthesis
(e) From Grignard Reagent
3. Reduction Of Oxygen Containing Compounds
(a) Aldehydes & Ketones (b) Carboxylic Acids (c) Alcohols
4. From Salts Of Carboxylic Acids
(a) Decarboxylation (b) Kolbe’s Electrolysis
5. From Metal Carbides (Only Methane)
ₕydᵣₒcₐᵣbₒₙₛ C̲ i ̲r ̲c̲l ̲e̲
,Revisiting Corey -
House synthesis :
'
1 hi R' ✗ R R
RX Rzculi +
. -
2- CUI
⇐ ilmann's
reagent)
Halide 1 Halide
org
2
org
.
. . .
I
Alkyl i 1° Alkyl
can be
can only be ,
-
CH
}
CCH] , 1°, 2339 2°
cyclo alkyl
cydoakyl ; phenyl can be phenyl but reaction is
(2939 Very slow
( so not a
good method
Note : Hence the given example is not formed in a
good
yield using Corey House method
CHICHI
-
.
ₕydᵣₒcₐᵣbₒₙₛ C̲ i ̲r ̲c̲l ̲e̲
, (e) From Grignard Reagent RMGX ; ✗ f- F
Preparation :
•+ g- Mezo 8- St
R
R X +
Mg MgBr
-
-
dry
• ✗ IF ether
. ease
of formation : RI > R Br > RCI RF
8- St
Ngt
-
covalent ←
R -
-
✗
→ ionic bond
bond
2 → acts as a carbanion
when it pulls out an .
When it acidic atom ; it
H -
cs
said to act as
Shares / gives
its Bronsted Base
away e- cloud
to others ,
it is
said to act as
Nucleophile
ₕydᵣₒcₐᵣbₒₙₛ C̲ i ̲r ̲c̲l ̲e̲
