chemical properties of alkanes Flashcards
1
Q
HALOGENATION
A
free radicle susbitution reaction
F2>Cl2>Br2>I2
2
Q
bromination is more selective than chlorination
A
reactivity of bromine with
3 degree H= 1600
2 degree H= 82
1 degree H= 1
reactivity of chlorine with
3 degree H= 5
2 degree H= 3.8
1 degree H= 1
3
Q
iodinisation is a slow and reversible process
A
takes place inthe presence of oxidising agent (HIO3, HNO3)
4
Q
fluorination is explosive reaction
A
…
5
Q
COMBUSTION
A
heat of combustion inc with the inc in no of C atom in the ring
6
Q
controlled oxidation of alkane
A
- Cu tube at 523K/100atm
- Mo2O3 at 543K/ 100atm
- (CH3COO)Mn
- KMnO4 (oxidation)
7
Q
pyrolysis
A
thermal breaking
free radicle reaction
8
Q
AROMATISATION
(catalyst- Cr2O3, V2O3
T=773 K)
A
1) cyclisation
2) dehydrogenation
3) aromatization
9
Q
ISOMERISATION
(cat- HCl/AlCl3)
A
min 4 C are req for isomerisation
