1249. Bis(p-dimethylaminobenzylidene)benzidine

Nomenclature

CAS number: 6001-51-0
N,N′-Bis[[4-(dimethylamino)phenyl]methylene][1,1′-biphenyl]-4,4′-diamine; 4,4′-di(4-dimethylaminobenzylideneamino)biphenyl; bis(4-dimethylaminobenzylidene)-p,p′-diaminodiphenyl; N,N′-bis(p-dimethylaminobenzal)benzidine.
C30H30N4; mol wt 446.59.
C 80.68%, H 6.77%, N 12.55%.

Description and references

Prepn from hydrazobenzene and p-dimethylaminobenzaldehyde: Sachs, Whittaker, Ber. 35, 1435 (1902).

Chemical structure

Properties

Yellow crystals from nitrobenzene; mp 318°. Reacts with solutions of the alkali tungstates to give a cinnabar-red precipitate.

Use

Determination of tungsten: Hovorka, Collect. Czech. Chem. Commun. 10, 518 (1938), C.A. 33, 1624 (1939).