TetraChloropalladate , ammonium

Johans et al. derived a model for diffusion-controlled electrodeposition at liquid-liquid interface taking into account the development of diffusion fields in both phases [91]. The current transients exhibited rising portions followed by planar diffusion-controlled decay. These features are very similar to those commonly observed in three-dimensional nucleation of metals onto solid electrodes [173-175]. The authors reduced aqueous ammonium tetrachloropalladate by butylferrocene in DCE. The experimental transients were in good agreement with the theoretical ones. The nucleation rate was considered to depend exponentially on the applied potential and a one-electron step was found to be rate determining. The results were taken to confirm the absence of preferential nucleation sites at the liquid-liquid interface. Other nucleation work at the liquid-liquid interface has described the formation of two-dimensional metallic films with rather interesting fractal shapes [176]. 

Raggi et al. [21] described a spectrophotometric analysis method with ammonium tetrachloropalladate for penicillamine in pharmaceutical formulations. An aqueous solution of penicillamine (298 pg/mL) was treated with 1.5 mL of 20 mM (NH4)2PdCl4 in 1 M HC1. The mixture was diluted to 10 mL, and the absorbance measured at 403 nm after 20 min. The method has a recovery of 98.8%, and was used to determine penicillamine in aqueous extracts of capsules. 

Tetraamminepalladium(II) tetrachloropalladate(II), the palladium analog of Magnus green salt, [Pt(NH3)4][PtCl4], may be prepared by treatment of aqueous ammonium tetra-chloropalladate(II) with aqueous ammonia, by addition of aqueous ammonia to a palladium(II) chloride solution, by treatment of aqueous tetraamminepalladium(II) chloride with palladium(II) chloride solution, and by precipitation on mixing a freshly prepared solution of a tetra-amminepalladium(II) salt with cold aqueous potassium tet-... 

Ammonium nitrate, 175 Ammonium persulfate, 238-239 Ammonium persulfate-Silver nitrate, 15 Ammonium sulfide, 267, 270 Ammonium tetrachloropalladate, 81 r-Amyl chloroformate, 15 f-Amyloxycarbonylamino acids, 15 a-Amyrenonyl acetate, 35 Oi-Amyrin acetate, 35... 

Preparation. Solutions of triphenylphosphine (1 g.) in hot alcohol and of ammonium tetrachloropalladate(II) (Alfa Inorganics) (0.55 g.) in hot water are mixed and shaken. A yellow solid separates water is added to complete pre-... 

Five grams of palladium(II) chloride [or 8 g. of ammonium tetrachloropalladate(II)] is dissolved in about 350 ml. of warm water to which a few drops of hydrochloric acid has been added. To the well-stirred solution is added dropwise a solution of 3.7 g. of potassium cyanide in about 50 ml. of water. As yellow palladium(II) cyanide precipitates, the supernatant liquid becomes colorless. The gelatinous precipitate is filtered on a Buchner funnel, washed well with water, transferred to a beaker, and dissolved in a solution of 4 g. of potassimn cyanide in about 75 ml. of water. Heat and agitation aid the solution process. The liquid is filtered and evaporated on a hot plate imtil crystals begin to form. When the solution has cooled, the crystals are filtered on a small Bttchner funnel and washed with a few drops of cold water. The process of evaporation, cooling, and filtering off the crystals formed may be repeated once or twice with the mother liquor. The salt may be purified by recrystallization from water ... 

Pd Polycarbonate, alumina Ammonium tetrachloropalladate + decamethylferrocene in 1,2-dichloroethane Nanoparticles (76)... 

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