TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The aryl or heteroaryl compounds, the aromatic or heteroaromatic residues of the corresponding born compounds, aromatic or 2-40C heteroaromatics, with one or more linear, branched, or cyclic alkyl or 1-20C alkoxy compounds, in which one or more non-successive CH2 groups can be substituted by O, S, C=O, or COOH, optionally substituted 2-20C aryl or heteroaryl, F, cyano, nitro, sulfonic acid derivatives, or can remain unsubstituted. The halogen or sulfonyloxy functionalized aryl or heteroaryl compounds have the formula (I):Ar-(X)n (I)Ar = aryl or heteroaryl as defined above;X = Cl, Br, I, S(O)2R1;R1 = alkyl, aryl, or fluorinated alkyl; andn = at least 1, preferably 1-20.The aromatic or heteroaromatic boron compounds have the formula (II):Ar-(BQ1Q2)m (II)Q1, Q2 = OH, 1-4C alkoxy, 1-4C aryloxy, 1-4C alkyl, or halogen; orQ1+ Q2 = 1-4C alkylenedioxy group, which can be optionally substituted by 1-4C alkyl; orBQ1Q2 = part of a boroxine ring of formula (II); andm = 1, preferably 1-20.The Pd compound is from a Pd source, and contains one or more additional components, where the Pd source is a Pd(II) salt or Pd(O) compounds or a complex, or metallic Pd, and the additional components are ligands which can be coordinated to the central Pd metal. The additional components can be phosphine ligands, e.g. tri-aryl-phosphine, heteroaryl-phosphine., where the substituents on the phosphorus atom can be the same or different, and can be optionally chiral. A solvent which as well as the presence of at least 5 wt.% water in it as also the presence of at least 5 wt.% solvent in the water does not form a clear single phase solution, i.e. phase separation occurs, is used as the water immiscible organic solvent.Preferred Process: The process is carried out in at least two stages, where in stage 1 an excess of monomers is introduced so that a short chain polymer with a first composition is formed, and in one or further stages the remaining monomers are added, so that finally the ratio of boron-containing reactive groups to halogen or sulfonyloxy-containing reactive groups is 1:1. EXAMPLE - A mixture of 2,2'7,7'-tetrabromo-9,9'-spirofluorene, biphenyl-4-boric acid and potassium phosphate was suspended in a mixture of toluene, dioxane and water, the solution was blown with argon over 30 minutes, after which tolyl phosphine, and 5 minutes later Pd catalyst were added, and the reaction mixture was heated to 87 degrees C. After 8 hours the mixture was cooled to room temperature, the solids were filtered off, washed with water and then with toluene, to give a 96 % yield of 2,2'7,7'-tetrakis(biphenyl-4-yl)-9,9'-spirofluorene (I).