process for producing water-containing preparations of platinum group metal complexes (mgp), use of water-containing preparations, process for producing electroplating baths and water-containing preparation of a pt (ii) complex

摘要

Process for the production of water-containing preparations of platinum group metal complexes (mgp), use of water-containing preparations, process for the production of electroplating baths and water-containing preparation of a pt (ii) complex relates to a method for producing aqueous preparations of platinum group metal complexes (mgp) pt, pd, rh and ir of formula [ma / mb / mc (l) a (h2o) b (o2-) c (oh-) d] (oh-) and (h +) f, where ma = ptii or pdii, mb = ptiv, mc = rh or ir, l is a monodentate or bidentate neutral donor binder and a is an integer between 1 and 4 (or 2) and / or between 1 and 6 (or 3), b is an integer between 0 and 3 (or 5), c is an integer between 0 and 3 (or 4), d is a integer between 0 and 3 (or 5), and is an integer between 0 and 2 (or 3 or 4) and f is an integer between 0 and 4 (or 5). In the method according to the invention the hydroxylated complexes h2pd (oh) 4 (in the case of ma = pdii), h2pt (oh) 6 (in the case of ma = ptii and mb = ptiv) or h3mc (oh) 6 (for mc = rhiii iriii) are converted, in the presence of the donor ligands, wherein at least one hydroxyl group of the hydroxylated complex is substituted. preferably the reaction takes place at temperatures in the range of 40 to 110 ° C, with a reaction time of between 2 and 24 hours, where, where ma = ptii, the conversion occurs additionally in the presence of a reducing agent. The method optionally further comprises an exchange of oh anions bound outside the complex sphere by other anions (e.g., hydrogen carbonate or carbonate anions). aqueous preparations contain mgp complexes such as [pt (en) 2] (oh) 2, [pt (ea) 4] (oh) 2 or [rh (nh3) 6] (oh) 3 and are used to produce electroplating baths, heterogeneous catalysts or metal powders, for example. 1/1