Reactions of phosgene with ammonia and hydrazine

2 Reactions of phosgene with Group IS hydrides 9.10.2.1 Reactions of phosgene with ammonia and hydrazine 

The reaction between ammonia and phosgene (in a 4 1 stoicheiometry) was first reported in 1812, in the paper in which John Davy reported the discovery of phosgene [467]. The white product was claimed by Regnault in 1838 [1696a] to be a mixture of ammonium chloride and an isomeric carbamide of urea , but Hofmann [972a] and Natanson [1483aa] later correctly demonstrated that it was a mixture of ammonium chloride and urea itself. The overall reaction between phosgene and ammonia in benzene is thus deceptively simple [2168]  

HOCN will also react with ammonia (Wohler s synthesis) to give urea, and with biuret to give ammelide [2168]. The intermediacy of HOCN was confirmed in 1936, when the salts 

Kj[Co(NCO),j] and AgNCO were isolated from the system [671]. At 500 C, carbamoyl 

An early study [443a] reports that phosgene reacts with hydrazine hydrate to give [NjH5]C1, carbon dioxide and water. 

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