Palladium(II) chloride, also known as palladium dichloride, are the chemical compounds with the formula PdCl2. Water solubility Insoluble. Characters: Brown powder, it is soluble in dilute hydrochloric acid. PdCl2 is a common starting material in palladium chemistry – palladium-based catalysts are of particular value in organic synthesis. It is prepared by chlorination of palladium. Molecular formula: PdCl2 It is mainly used in the manufacture of special catalyst, molecular sieve, production of gas-sensitive element, and so on. Palladium(II) chloride is sometimes used in carbon monoxide detectors. Carbon monoxide reduces palladium(II) chloride to palladium.
Palladium(II) chloride is prepared by dissolving palladium metal in aqua regia or hydrochloric acid in the presence of chlorine. Molecular weight:177.32. Alternatively, it may be prepared by heating palladium sponge with chlorine gas at 500°C. Melting point 678-680 ºC. This compound may also further react with phosphines to give phosphine complexes of palladium. It is also called nci-c60184, Palladouschloride and Plladium chloride. CAS NO.: 7647-10-1. Palladium chloride may also be used to give heterogeneous palladium catalysts: palladium on barium sulfate, palladium on carbon, and palladium chloride on carbon.
Bis(triphenylphosphine)palladium(II) dichloride is a coordination compound of palladium containing two triphenylphosphine and two chloride ligands. This yellow complex is often used for palladium-catalyzed coupling reactions, e.g. the Sonogashira–Hagihara reaction. The complex is square planar. Both cis and trans isomers are known. Density 4.00. Even when dry, palladium(II) chloride is able to rapidly stain stainless steel. Thus, palladium(II) chloride solutions are sometimes used to test for the corrosion-resistance of stainless steel.
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