This however is relaxed often due to slight lowering of symmetry. One point to note is that in colours of transition metal complexes the strict d-d transition is formally quantum mechanically forbidden. He is the sort of chemist who looked at all sorts of high oxidation type metal complexes and has just published his 1250th paper One name springs to mind - "Kurt Dehnicke". Higher oxidation "Werner type" complexes were almost certainly studied in the early part of the 20th century and probably revisited later when spectroscopic methods became much more sophisticated in the 1960's and 1970's. This is largely because many of its compound undergo oxidative addition reactions which were of tremendous interest due to their similarity to Wilkinson's catalyst. Iridium has been extensively studied particularly low oxidation state iridium complexes such as Vaskas complex. Probably "IrCl4" is some complex compound, with Ir and Cl atoms in it at a ratio 1 : 4. There unfortunately is only little literature about this.Īlso, the "IrCl4" has net formula IrCl4, but it is not simply iridium (IV) chloride (according to many textbooks, that compound is of doubtfull existence). The colors are a mystery to me, I need more research and I'll try to find out more about that. When an oxidizer is added in the presence of hydrochloric acid to this yellow solution, then it becomes dark red (like red wine, but a brighter color). the film that has the ceramic strength protection with the metallized finish is surprise their most expensive automotive film. When the solution is acidified and a reductor is added, then the solution turns yellow (color of iridium (III) ?). IrCl4 certainly is as intense as KMnO4 when it is dissolved in water and gives a dull purple color to the solution (not the bright purple of KMnO4). One thing I can say already, the number of colors, which can be made with solutions of iridium salts really is great and the colors are very intense. I ordered 3 grams of "IrCl4" and I will soon make a page about the different colors of solutions of Ir-salts. I do not have any experience with plutonium (my sample did not yet arrive ), but I do have experience with iridium salts. This mix of basic copper salts indeed is green with a somewhat blue hue (green/cyan). When copper rusts, then no copper oxide is formed, but a basic copper carbonate and/or a basic copper sulfate (depending on the precise nature of pollutants of the air).
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