TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The emitting compound is used together with at least one matrix material comprising ketones, phosphine oxides, sulfoxides, sulfones, triarylamines, carbazole derivatives, indolocarbazole derivatives, indenocarbazole derivatives, azacarbazole, bipolar matrix materials, silanes, azaboroles, boronic esters, diazasilole derivatives, diazaphosphole derivatives, triazine derivatives, zinc complexes, dibenzofuran derivatives or bridged carbazole derivatives.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Claimed): The preparation of (I), comprises reacting (II) with a metal alkoxide of formula (M(OR)n) (XIV), a metal ketoketonate of formula (XV), a metal halide of formula (M(Hal)n) (XVI) or with a dimeric metal complex of formula (XVII).Hal = F, Cl, Br or I.Preferred Components: The compound (I) is not charged. The compound (I) exhibits a substituent R exhibiting a positive mesomeric effect, which is bonded to the cycle, which binds to the metal through the carbon, in meta position to the metal. The compound (I) exhibits a substituent R exhibiting a negative mesomeric effect, which is bonded to the cycle, which binds to the metal through the carbon, in para position to the metal. The substituent R, which is in ortho-position to the metal coordination, exhibits a coordinating group that is also coordinated to the metal group M. The compound (I) comprises polydentate ligands comprising imidazole complexes of formula (VII)-(XIII).V4 = CR2, NR, O or S; andV5 = bridging unit containing 1-80 atoms of main group 3, 4, 5 and/or 6 or 3-6 membered homo- or heterocyclic compound, which covalent bonds (II) with each other or (II) with L1. Preferred Definitions:    M = Cr, Mo, W, Re, Ru, Os, Rh, Ir, Ni, Pd, Pt, Cu, Ag or Au;    L = N, where 1-4 groups, preferably 1-3 groups X is N;    R1 = 112 groups e.g. 2,2-dimethyl-propane-1-yl, 2,2-dimethyl-butane-1-yl, (1,1-dimethyl-ethyl)-cyclohexane-2-yl, pentane-3-yl, 4-methyl-hexane-3-yl, (1-methyl-ethyl)-cyclohexane-1-yl, (1,1-dimethyl-ethyl)-benzene-2-yl, (ethyl)-benzene-1-yl, (cyclohexyl)-benzene-1-yl and biphenyl-3-yl; and    L1 = CO, nitrogen monoxide, isocyanide, amine, phosphine, phosphite, arsine, stibine, carbene, hydride, deuteride, F-, Cl-, Br-, I-, cyanide, cyanate, isocyanate, thiocyanate, isothiocyanate, amide, carboxylate, O2-, S2-, diamine, imine, diimine, diphosphine, borate or bidentate monoanionic, neutral or dianionic ligands, which is bonded with the metal of a cyclometalated five- or six-membered ring having at least one metal-carbon bond.    SPECIFIC COMPOUNDS - 263 Compounds are disclosed e.g. iridium complex of formula (Ia)-(Ie).    EXAMPLE - Mixture of tris-acetylacetonato iridium(III) and 6-isopropyl-benzo(4,5)imidazo(1,2-c)quinazoline were provided under vacuum. Then the mixture was heated at 270 degrees C for 100 hours to obtain a molten mixture. Then the molten mixture was cooled to obtain sintered cake. Then the sintered cake with glass beads (100 g) was added to a mixture (100 ml) of dichloromethane and tetrahydrofuran and mechanically stirred for 3 hours. Then the suspension was decanted and the solid was filtered and dried in vacuum. Then the dried solid was worked up to obtain iridium complex (Ia).