TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation: No preparation method is given. Preferred Definitions:    M(L)n = substituted metal-alkyl, pyridinyl quinoline of formula (IV), substituted metal-1,12-diaza-benzo(c)phenanthrene of formula (V), metal-1,12-diaza-benzo(c)phenanthrene of formula (VI) or metal-1,12-diaza-benzo(c)phenanthrene of formula (VII);    M = Ir, Pt, Cu (preferred), Zr, Hf, Mo, W, Ru, Os, Rh, Ir, Ni, Pd, Pt, Cu, Ag or Au;    L1, L2 = CO, NO, -NC, amines, phosphines, phosphites, AsH3, SbH3, nitrogen-containing heterocyclic compounds, hydride, deuteride, F, Cl, Br, I, alkylacetylides, arylacetylides, CN-, cyanate, isocyanate, thiocyanate, isothiocyanate, alcoholates, thioalcoholates, amides, carboxylates, O2-, S2-, =N-R4, N3-, diamines, imines, diimines, heterocyclic compounds containing two nitrogen atoms, diphosphines, 1,3-diketonates derived from 1,3-diketones, 3-ketonates derived from 3-ketoesters, carboxylates derived from aminocarboxylic acids, salicyliminates derived from salicylimines, dialcoholates derived from dialcohols, dithiolates derived from dithiols, borates of nitrogen containing heterocyclic compounds, bidentate monoanionic ligands which with the metal form a cyclometallated five-membered ring containing at least one metal-carbon bond, eta 5-cyclopentadienyl, eta 5-pentamethylcyclopentadienyl, eta 6-benzene or eta 7-cycloheptatrienyl (all optionally substituted by at least one R);    either R1 = H, D, F, CI, Br, I, CN, NO2, CNO, NCS, SCN, CF3, 1-40C alkyl, alkoxy or 1-40C thioalkoxy, or cyclic or polycyclic 3-40C alkyl, alkoxy or thioalkoxy or 2-40C alkenyl or alkynyl (all optionally substituted by at least one R2) where in all substituents at least one nonadjacent CH2 is optionally substituted by -R2C=CR2-, -CC-, Si(R2)2, Ge(R2)2, Sn(R2)2, C=O, C=S, C=Se, C=NR2, P(=O)(R2), SO, SO2, NR2, O, S or CONR2 and at least one H is optionally substituted by F, Cl, Br, I, CN or NO2, or (hetero)aromatic ring having 5-60 aromatic ring atoms, and/or (hetero)aryloxy having 5-60 aromatic ring atoms (optionally substituted by at least one radical R2); or    at least two adjacent substituents R1 = monocyclic or heterocyclic, aliphatic or (hetero)aromatic ring (optionally substituted by at least one radical R2);    R3 = C, N, P, O and/or S; and    R4 = substituent.    SPECIFIC COMPOUNDS - 1 Compound (I) is disclosed i.e. 4,9-bis-(2,4,6-trimethylphenyl)-1,12-diaza-benzo(c)phenanthrene-di-cyano-platinum(II) of formula (Ia).    EXAMPLE - Mixture of 10 mmol of 4,9-di-chloro-1,12-diaza-benzo(c)-phenanthrene (3 g), 40 mmol of 2,4,6-trimethyl-benzene boronic acid (6.6 g), 60 mmol of potassium fluoride (3.5 g), 0.7 mmol of tri-tert-butyl-phosphine (142 mg) and 0.5 mmol of palladium(II) acetate (112 g) in dioxane (80 ml) was stirred at 100 degrees C for 30 hours. The mixture was allowed to cool to 60 degrees C and then a mixture of methanol:water (200 ml) was added dropwise. After stirring for another 2 hours at room temperature, the precipitate was filtered off, and worked up to give 4,9-bis-(2,4,6-trimethylphenyl)-1,12-diaza-benzo(c)phenanthrene. A mixture of 5 mmol of 4,9-bis-(2,4,6-trimethylphenyl)-1,12-diazabenzo(c)phenanthrene (2.3 g) and 5 mmol of platinum(II) cyanide (1.2 g) in dimethylformamide (50 ml) was heated to reflux for 18 hours. The mixture was allowed to cool to room temperature. The precipitate was filtered off, and worked up to give 4,9-bis-(2,4,6-trimethylphenyl)-1,12-diaza-benzo(c)phenanthrene-di-cyano-platinum(II) (1.4 g).