-
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
Many sulfide nitrogen to S n- N n- majority
.
S 4 N 4 is an orange-yellow solid with a melting point of 178.
2°C.
It is stable in the air and is a raw material for the preparation of other nitrogen and sulfur compounds
.
The molecular structure of S 4 N 4 is shown in Figure 12-5(a).
Explosive reaction occurs when S 4 N 4 is hit or heated rapidly:
S 4 N 4 =4S+2N 2
S 4 N 4 is insoluble in water and does not hydrolyze
.
However, it will hydrolyze to produce thiosulfate , trisulfate and ammonia in case of dilute strong alkali solution
2S 4 N 4 +6NaOH+9H 2 O=Na 2 S 2 O 3 +2Na 2 S 3 O 6 +8NH 3
S 4 N 4 is hydrolyzed to produce thiosulfate, sulfite and ammonia when it meets strong alkali solution :
S 4 N 4 +6NaOH+3H 2 O=Na 2 S 2 O 3 +2Na 2 SO 3 +4NH 3
S 2 N 2 is a colorless crystal at room temperature, insoluble in water, but soluble in many organic solvents
.
The S 2 N 2 molecule has a planar quadrilateral ring structure, as shown in Figure 12-5(b)
(SN) n is called polysulfur nitride or polythiazolyl, bronze color, metallic luster and low temperature superconductivity
.
(SN)n is more stable than S 2 N 2 , and no explosive decomposition reaction occurs when the temperature is below 240℃
S 4 N 2 is a red crystal, which melts into a deep red liquid at 25°C, and decomposes violently when the temperature reaches 100°C
.
The S 4 N 2 molecule has a boat configuration, as shown in Figure 12-5(c)
Related link: Nitrogen halides
