Preparation and Reactions
Phosgene oxime can be prepared by reduction of chloropicrin:
- Cl3CNO2 + 2 Sn + 5 HCl + H2O → Cl2C=N-OH + 2 H3O
The observation of a transient violet color in the reaction suggests intermediate formation of trichloronitrosomethane (Cl3CNO). Early preparations, using stannous chloride as the reductant, also started with chloropicrin
The compound is electrophilic and thus sensitive to nucleophiles, including base hydrolysis:
- Cl2CNOH + 2 NaOH → CO2 + NH2OH + 2 NaCl + H2O
Similar processes provide an easy way to destroy this dangerous compound. Hydrazine converts it to HCN and N2.
Read more about this topic: Phosgene Oxime
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