Abstract: An electrophotographic recording material comprising a conductive support and a photosensitive layer containing a photoconductive crystalline substituted metal-free phthalocyanine compound and/or mixed crystals of said substituted metal-free phthalocyanine compounds with unsubstituted metal-free phthalocyanine, wherein said substituted metal-free phthalocyanine compound represented by general formula (I) defined herein contains a halogen, nitro or cyano substituent, and the major part by weight of said substituted metal-free phthalocyanine compound and the mixed crystals of said substituted metal-free phthalocyanine compound with unsubstituted metal-free phthalocyanine is (are) present in the X-morphological form.

Abstract: An electrophotographic recording material comprising a conductive support and a photosensitive layer containing a photoconductive crystalline substituted metal-free phthalocyanine compound and/or mixed crystals of said substituted metal-free phthalocyanine compounds with unsubstituted metal-free phthalocyanine, wherein said substantial metal-free phthalocyanine compound represented by general formula (I) defined herein is substituted with alkyl or alkoxy.

Abstract: The present invention relates to a process for coloring polymeric materials by dyeing or pigmenting said polymeric materials with a pigment salt having the formula (I): ##STR1## and tautomeric forms thereof, wherein M.sup.n+ is an n-valent cation.

Abstract: 1,2,3-Tricyanobenzene can be prepared in a good yield from fluorobenzonitriles by reaction with an alkali metal cyanide. This product can be converted into metal-free tetracyanophthalocyanines or into the corresponding metal complexes by tetramerisation, if appropriate in the presence of metals or metal compounds. These products are excellent organic pigments.

Abstract: Metal-free phthalocyanines in the .chi.-modification substituted in up to four ortho positions can be prepared by tetramerisation of a reaction mixture consisting of phthalonitriles substituted in the 3-position with phthalonitrile in a molar ratio of 4:0 to 1:40 in the presence of a base and subsequent heat treatment at temperatures of between 100.degree. and 300.degree. C. They constitute excellent organic pigments.

Abstract: This invention relates to a process for preparing asymmetric isoindoline pigments of the formula ##STR1## in which R.sup.1 is an electron-withdrawing group, R.sup.2 and R.sup.3 are independently hydrogen, alkyl, or aryl, and R.sup.4 R.sup.5 R.sup.6 and R.sup.7 are independently hydrogen, halogen, alkyl, alkoxy, or aryloxy. The process employs an initial reaction of a 1,2-dicyanobenzene with an alcohol in an organic medium in the presence of a base. The resultant imino-isoindoline intermediate composition reacts without isolation with a cyanomethylene compound NC--CH.sub.2 -R.sup.1 to form a partly condensed product that is then condensed, optionally without isolation, in the presence of water with barbituric acid or a derivative thereof to form the asymmetric isoindoline pigment.

Abstract: Metal complexes of azines of the formula ##STR1## in which X denotes hydrogen or halogen,R denotes hydrogen or an organic radical,R.sub.1 denotes hydrogen or an organic radical,R.sub.2 denotes an organic radical, in which R.sub.1 and R.sub.2 together with the C atom linking them can also form a carbocyclic or heterocyclic ring or a carbocyclic or heterocyclic ring system in which the rings and ring systems mentioned can also be substituted, and one of the radicals R.sub.1, R.sub.2 or R.sub.1 and R.sub.2 together contain a group capable of forming a metal salt, and processes for pigmenting using these metal complexes.

Abstract: This invention relates to a process for preparing asymmetric isoindoline pigments of the formula ##STR1## in which R.sup.1 is an electron-withdrawing group, R.sup.2 and R.sup.3 are independently hydrogen, alkyl, or aryl, and R.sup.4, R.sup.5, R.sup.6, and R.sup.7 are independently hydrogen, halogen, alkyl, alkoxy, or aryloxy. The process employs an initial reaction of a 1,2-dicyanobenzene with an alcohol in an organic medium in the presence of a base. The resultant imino-isoindoline intermediate composition reacts without isolation with a cyanomethylene compound NC--CH.sub.2 --R.sup.1 to form a partly condensed product that is then condensed without isolation in the presence of water with barbituric acid or a derivative thereof to form the asymmetric isoindoline pigment.

Abstract: Porphyrins of the formula ##STR1## in which the substituents have the meaning given in the description are obtained by heating compounds of the formula ##STR2## if appropriate in the presence of compounds of the formula ##STR3## The porphyrins are used as pigments.

Abstract: An electrophotographic recording material comprising a conductive support and a photosensitive layer containing at least one photoconductive compound that has p-type charge generating capacity and is a tetrabenzoporphyrin type compound represented by the following general formula (I): ##STR1## wherein: each of X.sup.1, X.sup.2, X.sup.3, and X.sup.4 (same or different) represents a substituent selected from the group consisting of halogen, e.g. chlorine or bromine, nitro, cyano, (C.sub.1 -C.sub.2) alkyl and alkoxy, e.g. methoxy or ethoxy or 2 X.sup.1 's, 2 X.sup.2 's, 2 X.sup.3 's or 2 X.sup.4 's together represent the atoms necessary to form a substituted or unsubstituted carbocyclic or heterocyclic ring system;k, l, m, and n each and independently represent zero or an integer 1 to 4, R.sup.1 represents hydrogen, a (C.sub.1 -C.sub.2) alkyl, aralkyl or aryl group; each of the A's (same or different) represents nitrogen, or a CR.sup.2 group, wherein each of the R.sup.

Abstract: A new process for the preparation of pigments of the formula ##STR1## comprises first reacting phthalodinitrile in an organic medium in the presence of a base with an alcohol and then with a compound of the formula ##STR2## in the presence of water at a pH of 1-6.