Reaction #345982

Reaction equation

urea

urea

p-phenylenediamine

→

4,4'-DIAMINO CARBANILID

Solvents

water

water

Conditions

Workup

1. 1
   OtherTo a 1-liter, 3-neck round-bottom flask equipped with a mechanical stirrer, nitrogen inlet tube
2. 2
   workup.ADDITIONwas added 500 ml
3. 3
   Otherby bubbling nitrogen gas through it for three hours
4. 4
   Otherthe solution which formed
5. 5
   Temperaturewas refluxed for about 72 hours under a nitrogen atmosphere

Procedure

To a 1-liter, 3-neck round-bottom flask equipped with a mechanical stirrer, nitrogen inlet tube extending below the liquid level and a reflux condenser with a nitrogen exit to a gas bubbler, was added 500 ml. of distilled water. After the water was de-oxygenated by bubbling nitrogen gas through it for three hours, 15 g. (0.25 mole) of a commercial pre-dried urea and 60 g. (0.554 mole) of purified p-phenylenediamine were added and the solution which formed was refluxed for about 72 hours under a nitrogen atmosphere. The diamine to urea mole ratio utilized was 2.22.

Source