Chemical properties of Interhalogen compounds.pdf

Chemical properties of Interhalogen compounds

1. Chemical properties of Interhalogen
compounds
Dr. MithilFalDesai| Shree Mallikarjun and Shri Chetan Manju Desai College
Canacona, Goa

2. Reactivity
Interhalogens are more reactive than halogens (except F
2)
HydrolysisICl + H
2
O HCl + HIO
Cl
2
+ H
2
O HCl + HClO
hypoiodous acid
hypochlorous acid
BrF
5
+ 3H
2
O 5HF + HBrO bromic acid
Fluorinate metal oxidesUO
2
+ 4BrF
5 3UF
4
+ 2Br
2
+3O
2
3UF
4
+ ClF
3 UF
6
+ ClF

3. AX type interhalogen compounds and chemical
reactivity
Fluorination6ClF + 2 Al 2AlF
3
+ 3Cl
2
6ClF + U UF
6
+ 3Cl
2
6ClF + S SF
6
+ 3Cl
2 Simultaneous Chlorination and FluorinationClF + CO
COClF
ClF + SF
4
SClF
5

ClF + SO
2
SO
2
ClF
Wij’s reagentR
1
R
2
ICl
R
1
R
2
ICl Chlorination and iodinationOH
O
OH
ICl vapourICl in nitrobenzene
iodination chlorination
Addition compounds with alkali halideNaBr + ICl
Na[BrICl]
KI + ICl K[I
2
Cl]
ClF
BrF
IF
BrCl
ICl
IBr

4. AX
3 type interhalogen compounds and chemical
reactivity
ClF
3BrF
3
IF
3(ICl
3)
2ClF
3
+ Cl
2
3ClF
3ClF
3
+ U UF
6
+ 3ClF
4ClF
3
+ 6MgO 6MgF
2
+ 2Cl
2
+3O
2
4ClF
3
+ 2Al
2
O
3 4AlF
3
+ Cl
2
+ 2ClF
2ClF
3
+ 2AgCl 2AgF
2
+ Cl
2
+ 2ClF
2ClF
3
+ 2NH
3 6HF + Cl
2
+ N
2
ClF
3
+ BrF
3 [ClF
2
]
+
+ [BF
4
]
-
ClF
3
+ SbF
5 [ClF
2
]
+
+ [SbF
6
]
-
ClF
3
+ PtF
5 [ClF
2
]
+
+ [PtF
6
]
-
4ClF
3
+ 3N
2
H
4 12HF +3N
2
+ 2Cl
2

5. AX
3 type interhalogen ccompounds and chemical
reactivity
ClF
3BrF
3
IF
3(ICl
3)
2BrF
3
+ 3SiO
2 3SiF
4
+ 2Br
2
+ 3O
2
BrF
3
+ 3TiO
2 3TiF
4
+ 2Br
2
+ 3O
2
BrF
3 as non-aqueous solvent
-m.p 8.8 ° C and b. p. 126 °C
-Not violent
-Considerable self ionisation than ClF
32BrF
3
[BrF
2
]
+
+ [BrF
4
]
-
Order of reactivity
ClF
3 > BrF
5 > IF
7 > ClF> BrF
3> IF
5 > BrF> IF
3 > IF

6. AX
5 type interhalogen ccompounds and chemical
reactivity
ClF
5BrF
5
IF
53ClF
5
+ 2H
2
O FClO
2
+ 4HF
BrF
5
+ 3H
2
O HBrO
3
+ 5HF
BrF
5
+ SiO
2 SiF
4
+ 5BrF
3
+ O
2
BrF
5
+ CsF Cs[BrF
6
]
IF
5
+ KI K[IF
6
]
IF
5
[IF
4
]
+
+ [IF
6
]
-

7. AX
7 type interhalogen ccompounds and chemical
reactivity
IF
7
PreparationKI + 4F
2
IF
7
+ KF
PdI
2
+ 8F
2
2IF
7
+ PdF
2
ReactionsIF
7
+ H
2
O IOF
5
+ HF
IF
7
+ SiO
2
2IOF
5
+ SiF
4
IF
7
+ CsF Cs[IF
8
]