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In both forms of PtCl 2, each Pt center is four-coordinate, being surrounded by four chloride ligands. Complementarily, each Cl center is two-coordinate, being connected to two platinum atoms. [2] The structure of α-PtCl 2 is reported to be disordered and contain edge- and/or corner-sharing square-planar PtCl 4 units. [3]
Chloroplatinic acid (also known as hexachloroplatinic acid) is an inorganic compound with the formula [H 3 O] 2 [PtCl 6](H 2 O) x (0 ≤ x ≤ 6). A red solid, it is an important commercial source of platinum, usually as an aqueous solution. Although often written in shorthand as H 2 PtCl 6, it is the hydronium (H 3 O +) salt of the ...
Typical of Pt(IV), the metal centers adopt an octahedral coordination geometry, {PtCl 6}. This geometry is achieved by forming a polymer wherein half of the chloride ligands bridge between the platinum centers. Because of its polymeric structure, PtCl 4 dissolves only upon breaking the chloride bridging ligands. Thus, addition of HCl give H 2 ...
The procedure involves first preparing a platinum nitrate which is then heated to expel nitrogen oxides. [3] H 2 PtCl 6 + 6 NaNO 3 → Pt(NO 3) 4 + 6 NaCl (aq) + 2 HNO 3 Pt(NO 3) 4 → PtO 2 + 4 NO 2 + O 2. The resulting brown cake is washed with water to free it from nitrates. The catalyst can either be used as is or dried and stored in a ...
Pt 4+ (aq) + 6 Cl − (aq) → [PtCl 6] 2− (aq) Experimental evidence reveals that the reaction of platinum with aqua regia is considerably more complex. The initial reactions produce a mixture of chloroplatinous acid (H 2 [PtCl 4]) and nitrosoplatinic chloride ([NO] 2 [PtCl 4]). The nitrosoplatinic chloride is a solid product.
Sodium hexachloroplatinate is obtained as an intermediate in the preparation of Pt complexes, often starting with the dissolution of platinum in aqua regia, giving hexachloroplatinic acid, which is then reacted with sodium chloride and evaporated, leaving the salt behind. [3] Pt + 4 HNO 3 + 6 HCl → H 2 [PtCl 6] + 4 NO 2 + 4 H 2 O
The complex is so poorly soluble that this step is employed in the isolation of platinum from ores and recycled residues. [3] As analyzed by X-ray crystallography, the salt crystallizes in a cubic motif reminiscent of the fluorite structure. The [PtCl 6] 2− centers are octahedral. The NH 4 + centers are hydrogen bonded to the chloride ligands ...
Some common examples of platinum precursors include potassium hexachloroplatinate (K 2 PtCl 6) or platinous chloride (PtCl 2) [1] [8] Different combinations of precursors, such as ruthenium chloride (RuCl 3) and chloroplatinic acid (H 2 PtCl 6), have been used to synthesize mixed-metal nanoparticles [9] Some common examples of reducing agents ...