TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (claimed): The complexes (1) and (2) are prepared by reaction of compounds of formula (5) and (6) with an arylboronic acid or corresponding ester of formula (7) in a reaction medium in the presence of a transition metal and/or compound, a phosphorus and/or nitrogen-containing additive and a base.R1 = H or 1-20C aliphatic or aromatic hydrocarbon or together span a mono- or polycyclic ring system.Preferred Composition: The compounds of formula (1)/(2) and/or (3)/(4) have a purity of greater than 99% (as analyzed by 1H-NMR and/or HPLC).    TECHNOLOGY FOCUS - POLYMERS - Preferred Polymer: The mixture of compounds of formula (1)/(3) and/or (2)/(4) containing a polymer comprises polyfluorene, polyspirobifluorene, polypara-phenylene, polycarbazole, polyvinylcarbazole, polythiophene, or their copolymers, soluble in an organic solvent. Preferred Definitions:    Ar = benzene, toluene, xylene, fluorobenzene, difluorobenzene, biphenyl, 1,2- , 1,3-, 1,4-terphenyl, tetraphenyl, naphthylfluorene, phenanthrene, anthracene, 1,3,5-triphenylbenzene, pyrene, perylene, triplycene, (2.2)paracyclophane, pyridine, pyridazine, 4,5-benzo-pyridazine, pyrimidine, pyrazine, 1,3,5-triazine, pyrrole, indole, 1,2,5-, 1,3,4-oxadiazole, 2,2'-, 4,4'-diazabiphenyl, quinoline, carbazole, 5,10-H-dihydro-phenazine, 10H-phenoxazine, phenothiazine, xanthene, 9-acridine, furan, benzofuran, thiophene or benzothiophene, carbazole, N-alkyl-carbazole, N-alkyl-phenoxazine, phenothazine or xanthene, phenyl, 1-, 2-naphthyl or 1-, 2-, 9-anthracenyl;    Q = F, Cl, Br, CN, NO2, SiR3 or 1-6C (cyclo)alkyl or (cyclo)alkoxy optionally having neighboring CH2 groups replaced by CF2;    M = Ir;    b = 0; and    c = at least 1.    EXAMPLE - A mixture of fac-tris(2-(2-pyridinyl-kappa-N)(5-bromophenyl)-kappaC)-iridium (III) (8.92 g), benzylboronic acid (5.12 g) and anhydrous tripotassium phosphate (13.37 g) was added to a solution of tri-o-tolylphosphine (182.62 mg) in dioxane and a solution of palladium (II) acetate (22.44 mg) in toluene (150 ml). The mixture was heated at 85 degreesC for 60 hours followed by cooling and washing with water (200 ml). The phases were separated, the organic phase concentrated to 50 ml and poured into ethanol (150 ml). The yellow microcrystalline precipitate was filtered and washed with ethanol (3x100 ml) followed by vacuum drying to yield fac-tris(2-(2-pyridinyl-kappa-N)(5-(phenyl)phenyl)-kappa-C)-iridium (III) (94.2-96.8% yield, greater than 99% purity).