TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Claimed): The preparation of the compound (I) comprises reacting corresponding free ligand or a precursor of the ligand with metal an alcoholate of formula (M(OR8)n) with a metal ketoketonate of formula (A) or with a metal halide of formula (MY1n) or with metal compounds, which carry alcoholate, halide, hydroxy or ketoketonate and can also be loaded.Y1 = F, Cl, Br or I.Preferred Components: In the organic electroluminescence device, a matrix material for the compound (I) is a ketone, phosphine oxide, sulfoxide, sulfone, triaryl amine, carbazole derivate, indolocarbazole derivative, azacarbazole, bipolar matrix material, silane, azaborole, boronic ester, triazine and/or zinc complex. The partial structure M(L)n (44 compounds are given) e.g. is a substituted 3a,9-diaza-cyclopenta(a)naphthaleno metal complex of formula (VI), 3,3a,9-triaza-cyclopenta(a)naphthaleno metal complex of formula (VII), 2,3a,9-triaza-cyclopenta(a)naphthaleno metal complex of formula (VIII), 2,3,3a,9-tetraaza-cyclopenta(a)naphthaleno metal (X), 1H-pyrazolo(4,3-h)quinolino metal complex of formula (XI), imidazo(1,2-a)(1,8)naphthyridino metal complex of formula (XII), 1H-imidazo(4,5-h)quinolino metal complex of formula (XIII), 1H-(1,2,3)triazolo(4,5-h)quinolino metal complex of formula (XIV) and imidazo(2,1-a)isoquinolino metal complex of formula (XV). The structure (L1) (28 compounds are given) e.g. a substituted 2,3-dihydro-1H-imidazole-1,2-diyl compounds of formula (XVI), imidazolidine-1,2-diyl compounds of formula (XVII), sulfur substituted monocyclic heterocycles of formulae (XVIII) and (XIX), sulfur substituted dicyclic heterocycles of formulae (XX) and (XXI), nitrogen containing momocyclic heterocycle of formulae (XXII), (XXIII), (XXIV) and (XXV). Preferred Definitions:    M = chromium, molybdenum, tungsten, rhenium, ruthenium, osmium, rhodium, iridium, nickel, palladium, platinum, copper, silver, gold, or a metal from third, fourth or the fifth main group.    SPECIFIC COMPOUNDS - 351 Compounds (I) are disclosed e.g. tris(imidazo(2,1-a)isoquinolino)iridium(III) complex of formula (Ia), tris(2-methyl-imidazo(2,1-a)isoquinolino)iridium(III) complex, tris(1,3a,5a,6-tetraaza-as-indacene)iridium(III) complex, bis(imidazo(2,1-a)isoquinolino)platinate(II) complex and bis(5,6-dimethyl-imidazo(2,1-a)isoquinolino)platinate(II) complex.    EXAMPLE - A mixture of the imidazo(2,11a)isoquinoline 1 (2.10 g) and sodium-bis-acetylacetonato-dichloro-iridate(III) (1.12 g) in triethylene glycol (5 ml) was stirred under slight argon flow for 24 hours at 240 degrees C. After cooling, the mixture was diluted with 1N hydrochloric acid (100 ml) and extracted five times with dichloro methane (100 ml for each time). The organic phase was washed three times with water (200 ml for each time), dried over a mixture of sodium sulfate and sodium carbonate. The residue was chromatographed on silica gel (mobile phase dichloro methane), then recrystallized from dichloro methane/hexane and then sublimated in vacuum (1x 10-5 mbar, 340 degrees C). The yield of tris(imidazo(2,1-a)isoquinolino)iridium(III) complex was 19% (0.33 g) with a purity of 99.9%.