A. Kirsch et al., 1,2,5,6-TETRAKIS(DIMETHYLAMINO)NAPHTHALENES AND 1,2,7,8-TETRAKIS(DIMETHYLAMINO)NAPHTHALENES AND THEIR DICATIONS - SYNTHESES AND PROPERTIES, Tetrahedron letters, 35(45), 1994, pp. 8365-8368
The new electron donor compounds 3 and 4 were synthesized and their pr
operties were studied. Oxidation with iodine produced the correspondin
g dications. An X-ray crystal study of the dication 13 gives evidence
of a cyanine-like structure.