Silver Nitrate → HCID 178418580, compound
Reaction equation
[NH:1]1[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[N:3]=[N:2]1.[N+]([O-])([O-])=O.[Ag+:14]>O>[NH:1]1[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[N:3]=[N:2]1.[Ag:14]Participants
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Conditions
- Temperature
- 50 °C
Procedure
6.5 g of benzotriazole and 10 g of gelatin were dissolved in 1,000 ml of water and the solution was stirred while maintaining the temperature at 50° C. A solution containing 8.5 g of silver nitrate dissolved in 10 ml of water was added to the above described solution for a period of 2 minutes and thus silver benzotriazole was formed. Then a solution containing 1.19 g of potassium bromide and 0.083 g of potassium iodide dissolved in 50 ml of water was added to the above described mixture for a period of 5 minutes. It is believed that on this step silver was supplied from the silver benzotriazole to form crystals of silver iodobromide (iodide: 20 mol%) adjacent to the silver benzotriazole. By controlling a pH of the emulsion thus prepared precipitation was caused and the undesirable salts were removed. The pH of the emulsion was adjusted to 6.0 and 400 g of the emulsion was obtained.
Workup
- additionwas added to the
- customof 2 minutes
Sources & evidence
- ORD record
- ord-fa2ce91b6982419cb4a076f620a923f2
- Source dataset
- uspto-grants-1985_02
- Patent number
- US04500624
Reaction notes
Loading…