Process for the preparation of tetraselenotetracene halides and

Details Process for the preparation of tetraselenotetracene halides and Process for the preparation of tetraselenotetracene halides and

1993-02-10

1995-05-23

Vargot, Mathieu D.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

264104, 264319, 540 1, C07D51702, B29C 4124

Patent

active

054179114

ABSTRACT:
A process for the preparation of tetraselenotetracene chlorides or bromides of formula I, ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each independently of one another H or F; R.sub.1 is CH.sub.3 and R.sub.2, R.sub.3 and R.sub.4 are H; R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each CH.sub.3 ; or R.sub.1 and R.sub.2 are CH.sub.3 or Cl, and R.sub.3 and R.sub.4 are H, and X is Cl or Br, which process includes reacting a tetraselenotetracene of formula II ##STR2## in a polar aprotic solvent, with stoichiometric amounts of an ammonium hydrochloride or hydrobromide, in the presence of oxygen at elevated temperature. An organic binder may be dissolved in the reaction solution and a substrate coated with this solution. After evaporation of the solvent, electrically conductive coatings are obtained that consist of a network of crystal needles of compounds of formula I in the binder matrix.

REFERENCES:
patent: 4601853 (1986-07-01), Helti et al.
patent: 4617151 (1986-10-01), Mayer et al.
patent: 4801701 (1989-01-01), Hilti et al.
patent: 4847441 (1989-07-01), Helti et al.
patent: 4935181 (1990-06-01), Theophilou et al.
Chem. Absts. vol. 91, No. 21-91:175269a.
Chem. Physics Letters vol. 76, 1980 92-95.
Synthetic Metals, 41-43 (1991) pp. 951-954.

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