-
Categories
-
Pharmaceutical Intermediates
-
Active Pharmaceutical Ingredients
-
Food Additives
- Industrial Coatings
- Agrochemicals
- Dyes and Pigments
- Surfactant
- Flavors and Fragrances
- Chemical Reagents
- Catalyst and Auxiliary
- Natural Products
- Inorganic Chemistry
-
Organic Chemistry
-
Biochemical Engineering
- Analytical Chemistry
- Cosmetic Ingredient
-
Pharmaceutical Intermediates
Promotion
ECHEMI Mall
Wholesale
Weekly Price
Exhibition
News
-
Trade Service
There are many types of halogen oxides and their properties vary greatly
.
The electronegativity of fluorine is greater than that of oxygen.
1.
Preparation of Halogen Oxides
OF 2 can be prepared by reacting elemental F 2 with 2% NaOH aqueous solution
.
2F 2 +2NaOH=OF 2 ↑+2NaF+H 2 O
The mixture of O 2 and F 2 reacts under low-voltage discharge conditions to produce O 2 F 2
.
O 2 +F 2 =O 2 F 2
Cl 2 O is the anhydride of hypochlorous acid, and Cl 2 O can be prepared by passing Cl 2 to the surface of newly prepared mercury oxide .
2Cl 2 +2HgO=HgCl 2 ·HgO+Cl 2 O
Action is to remove HgO CI -
.
The method of making Cl 2 O in large quantities is to react Cl 2 with wet Na 2 CO 3
.
2Cl 2 +2Na 2 CO 3 +H 2 O=Cl 2 O+2NaHCO 3 +2NaCl
In the laboratory, oxalic acid is used to reduce KCIO 3 to obtain CIO 2
.
2ClO 5 +C 2 O 4 2- +4H + =2ClO 2 ↑+2CO 2 ↑+2H 2 O
After HCIO 4 is carefully dehydrated with a dehydrating agent at low temperature, Cl 2 O 7 can be obtained by distillation under reduced pressure at lower temperature
.
2HCIO 4 =Cl 2 O 7 +H 2 O
I 2 O 5 can be prepared by drying and dehydrating HIO 3 , which is the most stable halogen oxide .
2H1O 3 =I 2 O 5 +H 2 O
2.
The properties of halogen oxides
Halogen oxides have strong oxidizing properties, most of which are unstable, and are prone to explosion when exposed to heat, vibration, or encountering reducing agents
.
.
OF 2 oxidizing elemental ratio F.
2 weak, but still with many metals, nonmetallic substance reacts fluorides and oxyfluorides
.
O 2 F 2 is extremely unstable and quickly decomposes into O 2 and F 2 at 173K
Cl 2 O is a yellow-brown gas that dissolves in water to generate hypochlorous acid
Cl 2 O+H 2 O=2HCIO
Cl 2 O is unstable and can react with many elements and compounds at low temperatures
Cl 2 O+3F 2 =OCIF 3 +CIF 3
Cl 2 O+N 2 O 5 =2CIONO 2
ClO 2 is a yellow gas with paramagnetism; unstable, easy to explode when the concentration is high; disproportionation reaction occurs in alkali:
2ClO2 2 +2NaOH=NaClO 3 +NaClO 2 +H 2 O
ClO 2 is often used for bleaching pulp and water treatment
Cl 2 O 7 is a colorless liquid.
C 2 O 7 =CIO 3 +CIO 4
I 2 O 5 is a white solid, and the most typical reaction is to completely oxidize carbon monoxide in the air to carbon dioxide
1 2 O 5 +5CO=I 2 +5CO 2
This reaction can be used to detect the CO content in the system