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Adams' catalyst is prepared from chloroplatinic acid H 2 PtCl 6 or ammonium chloroplatinate, (NH 4) 2 PtCl 6, by fusion with sodium nitrate. The first published preparation was reported by V. Voorhees and Roger Adams. [2] The procedure involves first preparing a platinum nitrate which is then heated to expel nitrogen oxides. [3]
When heated to 150–180 °C, it decomposes with autooxidation to plutonium (VI) with the formation of plutonyl nitrate (PuO 2 (NO 3) 2).Upon evaporation of concentrated nitric acid solutions of plutonium nitrate and alkali metal nitrates, double nitrates of the composition M 2 [Pu(NO 3) 6] are formed, where M = Cs +, Rb +, K +, Tl +, NH 4 +, analogous to ceric ammonium nitrate.
Platinum is a chemical element; it has symbol Pt and atomic number 78. It is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal. Its name originates from Spanish platina, a diminutive of plata "silver". [7] [8] Platinum is a member of the platinum group of elements and group 10 of the periodic table of ...
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Neptunium(IV) chloride – NpCl 4; Nickel(II) chloride – NiCl 2; Niobium oxide trichloride – NbOCl 3; Niobium(IV) chloride – NbCl 4; Niobium(V) chloride – NbCl 5; Nitrogen trichloride – NCl 3; Nitrosyl chloride – NOCl; Nitryl chloride – NO 2 Cl; Osmium(III) chloride – OsCl 3; Palladium(II) chloride – PdCl 2; Perchloric acid ...
Ammonium hexachloroplatinate is used in platinum plating. Heating (NH 4) 2 [PtCl 6] under a stream of hydrogen at 200 °C produces platinum sponge. Treating this with chlorine gives H 2 [PtCl 6]. [2] Ammonium hexachloroplatinate decomposes to yield platinum sponge when heated to high temperatures: [2] [5] 3(NH 4) 2 PtCl 6 → 3Pt(s) + 2NH 4 Cl ...
The title complex is one of several platinum ammine complexes. Hexaammineplatinum(IV) chloride; Trichlorotriammineplatinum(IV) chloride [2] cis-Tetrachlorodiammineplatinum(IV) [3] trans-Tetrachlorodiammineplatinum(IV) (RN 16986-23-5) [3]
Plutonium(IV) iodate is an inorganic compound with the chemical formula Pu(IO 3) 4, it is a salt which decomposes into plutonium(IV) oxide above 540 °C. [3] It can be generated in the reaction of plutonium(IV) nitrate and iodic acid, but this method cannot obtain a pure product; [3] Another preparation method is the reaction of plutonium(IV) nitrate or plutonium(IV) chloride with potassium ...