Water → 1,2-Bis(4-chlorophenyl)hydrazine

Participants

Reaction Steps

210 g p-chloronitrobenzene, 600 g water and 180 g sodium hydroxide (corresponding to a 23.1 wt. % aqueous solution), 0.3 g 2,3-dichloronaphthoquinone-1,4, 350 g n-hexane and 0.40 g platinum on activated charcoal (5% Pt) (the quantitative ratio of platinum metal to p-chloronitrobenzene used being 0.000095:1) are hydrogenated by the use of a gas sparger at a hydrogen pressure of 6 bars and at 60° to 65° C. The reduction is completed after 4 to 5 hours. The procedure set forth in Example 1 is followed, 151 g 4,4'-dichlorohydrazobenzene with a melting point of 120° to 121° C. and a purity of 98.5% being obtained, which corresponds to a yield of 88.5% of theory. The possible byproduct p-chloroaniline is not detectable.

Provenance & Evidence