TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Process: The formylating gent is a formamide and an inorganic and/or organic acid halide in a ratio of 1:1-100:1. The formamide is N-methyl-formamide, N,N-dimethylformamide or N-methyl-formanilide. The acid halide is phosphoroxide trichloride, thionyl chloride, sulfuryl chloride or oxalyl chloride. The formylating agent is an organic dihalogen-methyl-ether and a Lewis acid in a ratio of 1:1-1:4. The dihalogen-methyl-ether is 1,1-dichloromethoxymethane, -ethane, -propane or -butane. The Lewis acid is titanium(IV) chloride, tin(IV) chloride or aluminum chloride. The stoichiometric ratio of formylating agent to the compounds of formula (5) and (6) is 1:1-100:1.The purity of the compounds of formula (I)-(II) and (Ia)-(IIb) is greater than 99% (as measured by 1H-NMR and/or HPLC).Preferred Composition: The polymer is a polyfluorene, poly-spirobifluorene, poly-para-phenylene, polycarbazole or polythiophene. The polymer is a homo- or copolymer and is soluble in organic solvents. The electrical component is an organic light emitting diode, an organic integrated circuit, an organic field-effect transistor, an organic thin film transistor, an organic solar cell, an organic laser diode, an organic color filter for liquid crystal displays or an organic photoreceptor. EXAMPLE - fac-Tris(2-(2-pyridinyl-kappaN)phenyl-kappaC)-iridium(III) (6.548 g) was added to a mixture of N,N-dimethylformamide (80 ml) and phosphoroxide trichloride (1.53 g) at room temperature followed by heating to 80degreesC for 40 hours. The resulting deep red solution was then cooled to room temperature and poured into 1M NaOH solution (300 ml). After 1 hour the mixture was extracted with dichloromethane (2x150 ml). The combined organic phases were washed with water and dried over magnesium sulfate to yield fac-bis(2-(2-pyridinyl-kappa-N)phenyl-kappaC)-(2-(2-pyridinyl-kappaN)(5-formylphenyl)-kappaC) iridium (III) (5.74 g, 84% yield, 99.5 % purity) after recrystallization from toluene/ethanol.