Tetrachloropalladate dipotassium

Takazawa H, Ohba S, SaitoY (1988) Electron-density distribution in crystals of dipotassium tetrachloropalladate(II) and dipotassium hexachloropalladate(IV), K2[PdCl4] and K2[PdCl6]. Acta Cryst 844 580-585... 

Takazawa H, Ohba S, Saito Y (1988) Electron-density distribution in crystals of dipotassium tetrachloropalladate(ll) and dipotassium hexachloropaUadate(lV). Acta Cryst B44 580-585 Guryanova EN, Goldstein IP, Romm IP (1975) The donor-acceptor bond. WUey, New York Timoshkin AY, Suvorov AV, Bettinger HE, Schaefer HF 111 (1999) Role of the terminal atoms in the donor-acceptor complexes MX3-D (M=A1, Ga, In X=F, Q, Br, I D=YH3, YX3, X Y=N, P, As). JAm Chem Soc 121 5687-5699... 

Method B. In a 100-mL, two-necked flask equipped with magnetic stirrer and dropping funnel with gas inlet tube, 2.84 g (5 mmol) of tppts in 10 mL of water is added to a stirred solution of 0.32 g (1 mmol) of dipotassium tetrachloropalladate(II), K2[PdCU], dissolved in 10 mL of water. The reaction mixture turns brown. Then 170 mg (4.5 mmol) of sodium tetrahy-dridoborate, NaBH4, in 10 mL of water is added dropwise over a period of 30 min. Stirring is continued for another 90 min. The water is removed in a vacuum. The solid residue is suspended with 5 mL of ethanol and filtered. The filtration residue is suspended again with 5 mL of ethanol and the slurry is filtered. The remaining residue is then purified by column chromatography on Sephadex G-25. Yield 1.62 g (82%) brown powder. 

A great deal of activity has been expended on developing palladium catalysts including the use of dipotassium and disodium tetrachloropalladate(II) and cis and trans-diamminedichloropalla-dium(II) (for instance 1). 

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