Abstract: A process for the preparation of Langmuir-Blodgett layer systems is described. The process comprises transferring a monolayer to a solid substrate having an electrically conductive surface by applying an electric potential, thereby oxidizing or reducing an electroactive molecule present in the monolayer. The layer systems so obtained can be used, for example, as electrically conductive layers or as sensors.

Abstract: The invention relates to complexes of formula I ##STR1## wherein R.sup.1 is fluorine and R.sup.2 is hydrogen, or R.sup.2 is fluorine and R.sup.1 is hydrogen, and Y is bromine, or Y is also chlorine if R.sup.1 is hydrogen. These complexes are organic compounds which exhibit high electrical conductivity.

Abstract: The invention relates to complexes of formula I ##STR1## wherein R.sup.1 is fluorine and R.sup.2 is hydrogen, or R.sup.2 is fluorine and R.sup.1 is hydrogen, and Y is bromine, or Y is also chlorine when R.sup.1 is hydrogen. These complexes are organic compounds which exhibit high electrical conductivity.

Abstract: The novel complex of the formula I ##STR1## is an organic material with a high electrical conductivity and with a metallic phase transition at about 125.degree. K. under normal pressure, at which the conductivity increases suddenly. The complex can be used, for example, as an organic electrical conductor.

Abstract: The novel complex of the formula I ##STR1## can be produced for example by electrochemical oxidation of 2-fluoro-5,6,11,12-tetraselenotetracene in the presence of an inert organic solvent and a bromide-containing electrolyte. The novel 2-fluoro-5,6,11,12-tetraselenotetracene can for its part be produced by reacting 2,3-naphthalenedicarboxylic anhydride, in the presence of a Friedel-Crafts catalyst, with fluorobenzene to 2-(4-fluorobenzoyl)-naphthalene-3-carboxylic acid; cyclizing this to 2-fluoro-5,12-naphthacenequinone; reducing the 2-fluoro-5,12-naphthacenequinone to 2-fluorotetracene; reacting the 2-fluorotetracene with sulfuryl chloride to 2-fluoro-5,11- or 2-fluoro-6,12-dichlorotetracene; and finally reacting the last-mentioned at elevated temperature with selenium to obtain 2-fluoro-5,6,11,12-tetraselenotetracene. The complex of the formula I is metallically conducting, and is distinguished by a stable metallic phase down to at least 5.degree. K.

Abstract: A novel metallically conducting charge-transfer complex derived from 5,6,11,12-tetrathiotetracene and iodine is described. This complex is preferably produced by reacting 5,6,11,12-tetrathiotetracene and iodine together in the gas phase in an inert-gas atmosphere. The novel complex is characterized by a very high electrical conductivity, and it can be used, for example, as an organic conductor element.

Abstract: Novel 5,6,11,12-tetraselenotetracene-o-chloroanil complexes are disclosed which exhibit improved electrical conductivity, and low resistivity at room temperature. Said complexes are useful, e.g., as organic electrical conductors, solid state devices, and for providing antistatic coatings.