TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Claimed): Preparation of (I) comprises reacting the ligand with a metal alcoholate compound of formula (M(OR)n) (IV), a metal ketoketonate compound of formula (V), metal halide compound of formula (MHaln) (VI) or a dimeric metal complex compound of formula (VII).Hal = F, Cl, Br or I. Preferred Definitions:    M = Cr, Mo, W, Re, Ru, Os, Rh, Ir, Ni, Pa, Pt, Cu, Ag or Au; and    L1a = CO, NO, alkyl cyanide, aryl cyanide, alkyl isocyanide, aryl isocyanide, amine, phosphine, phosphite, arsine, stibine, nitrogen containing heterocycle, carbene, hydride, D, F, Cl, Br, I, alkyl acetylidene, aryl acetylidene, cyanide, cyanate, isocyanate, thiocyanate, isothiocyanate, aliphatic or aromatic alcoholate, aliphatic or aromatic thioalcoholate, amide, carboxylate, aryl, O2-, S2-, carbide, nitrene, diamine, imine, diimine, diphosphine, 1,3-diketonate, 3-ketonate derived from 3-ketoester, carboxylate derived from amino carboxylic acid, salicyliminate derived from salicylimine, dialcoholate, dithiolate, Borsten nitrogen containing heterocycle or ligand having a metal and a cyclometallized five or six ring.    SPECIFIC COMPOUNDS - 66 Complexes (I) are disclosed e.g. tris-acetylacetonato-iridium(III) of formula (Ia), tris-(2,2,6,6-tetramethyl-3,5-heptandionato)iridium, tris-(5-(2,2-dimethyl-propyl)-indazolo(2,3-a)quinoline)iridium, tris-(5-(2,2,2-trifluoro-ethyl)-indazolo(2,3-a)quinoline)iridium and tris-(5-(2,4,6-trimethyl-phenyl)-indazolo (2,3-a)quinoline)-iridium.    EXAMPLE - A mixture of tris-acetylacetonato-iridium(III) (10 mmole) and tert-butyl-indazolo(2,3-a)quinoline (60 mmol) was melted under vacuum (10-3 mbar). The obtained mixture was tempered at 260 degrees C for 60 hours. The obtained sinter cake was stirred with glass balls with a diameter of 3 mm (100 g) and dichloromethane (100 ml) for 3 hours, and dried. The dried solid material was extracted with tetrahydrofuran (approximately 500 ml) to obtain tris-acetylacetonato-iridium(III) complex (37%).