TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preparation (Claimed): The preparation of (I), comprises reacting the free ligand L and optionally L1 with a metal alcohol of formula (M(OR1)n) (LXXX) with metal ketone of formula (LXXXI) or with a metal halide of formula (M(Hal)n) (LXXXII).Hal = F, Cl, Br or I.Preferred Components: The bridging unit V1 is present, which connects L with at least one further ligand L or L1 and thus the metallic compound is of formula (XLV)-(XLIX). Preferred Definitions:    M = Sn, Cr, Mo, W, Re, Ru, Os, Rh, Ir, Ni, Pd, Pt, Cu, Ag or Au;    X = N (at least three X);    Z = C(=O);    V1 = bridging unit, comprising 1-80 atoms from the third, fourth, fifth and/or sixth main group or 3- to 6- membered homo- or heterocycle, which are covalently connected together with a part of ligand L or together with L and L1;    L1 = CO, NO, alkyl cyanide, aryl cyanide, alkyl isocyanide, aryl isocyanide, amine, phosphine, phosphite, arsine, stibine, nitrogen heterocycle, carbene, hydride, deuteride, F-, Cl-, Br-, I-, alkyl acetylidene, aryl acetylidene, cyanide, cyanate, isocyanate, thiocyanate, isothiocyanate, aliphatic or aromatic alcohol, aliphatic or aromatic thioalcohol, amide, carboxylate, aryl, O2-, S2-, carbide, nitrene, nitride ion, diamine, imine, diimine, heterocycle containing two N, diphosphine, 1,3-diketone derived from 1,3-diketone, 3-ketone derived from 3-ketoester, carboxylate derived from amino carboxylic acid, salicylimine derived from salicylimine, dialkoxide derived from dialcohols, dithiolate derived from dithiols, bristle nitrogen containing heterocycle, or bidentate ligand, which is made of two heterocyclic compounds, where 27 heterocyclic compounds are given e.g. heterocyclic compounds of formulae (III)-(XII), and one group binds over a neutral N or carbene atom and the other group binds over a negatively charged carbon atom or a negatively charged N, eta 5-cyclopentadienyl, eta 5-pentamethylcyclopentadienyl, eta 6-benzene or eta 7-cycloheptatrienyl (each of which is substituted by at least one R1), or 1,3,5-cis-cyclohexane, 1,1,1-tri(methylene)methane derivative or 1,1,1-trisubstituted methane;    Cy1 = heterocyclic compounds, where 24 heterocyclic compounds are given e.g. heterocyclic compounds of formulae (XIII)-(XXII);    Cy2 = heterocyclic compounds, where 18 heterocyclic compounds are given e.g. heterocyclic compounds of formulae (XXIII)-(XXXII);    E = S, O or NR;    q = position of the coordination to the metal; and    t = bond to X or to Cy2 in the ligand L.    SPECIFIC COMPOUNDS - 83 Compounds (I) are disclosed, e.g. iridium complexes of formulae (Ia)-(Ie).    EXAMPLE - 2-Methyl-4H-pyrimido(2,1-a)isoquinolin-4-one (6 parts) with tris(acetylacetonato)iridium(III) (1 parts) was stirred in an evacuated and sealed ampoule for 48 hours at 250 degrees C. The glassy melt was broken, crushed, and mixed with two volumes of tetrahydrofuran, after cooling, then stirred for 1 hour at room temperature, and four volumes of methanol was added drop wise. The reaction mixture was filtered after 2 hours of stirring and was washed with methanol, dried, recrystallized from dichloroethane or chlorobenzene and optionally sublimated in a vacuum to obtain iridium complex (Ia).