Palladate , sodium tetrachloro

Tellurophene forms a charge-transfer complex with tetracyanoethylene, and a complex with chromium tricarbonyl and with sodium tetrachloro-palladate(II). Tetraphenyltellurophene forms a complex of indefinite structure with triiron dodecarbonyl. Tetraphenyltellurophene forms a complex of indefinite structure with triiron dodecar-... 

This compound has been prepared by the reaction of sodium tetrachloro-palladate and the olefin or by the displacement of carbon monoxide firom [COPdQ2L or benzonitrile from (CeH,C N)2PdQ2. Bicydo[2.2.1]hepta-2,5-diene (2,S-norbomadiene) may be substituted in the following procedure for l,S-cyclooctadiene to yield (bicyclo[2.2.1]hepta-2,S-diene)dichloro-palladium(II). 

Palladate s. Lithium tetrachloro-palladate. Sodium -Palladium 26, 642... 

A 2.134-g. (0.0202-mol) quantity of palladium metal is dissolved in aqua regia (3 ml. of 15 N HNOj + 12 ml. of 12 N HCl) which has been allowed to stand for about 30 minutes. If powdered palladium is used, no heat is required to effect solution for other forms of palladium metal, some heating is usually required. The solution is evaporated on a steam bath to a brown-black syrup, which is then covered with 5 ml. of 12 N hydrochloric acid and evaporated to moist salts. This treatment with hydrochloric acid is repeated twice more to remove nitric acid and to destroy nitrosyl complexes. The resulting tetrachloro-palladic(II) acid is dissolved, with stirring and heating, in a minimum volume of water (approximately 100 ml.), and 4.0 g. (0.068 mol) of sodium chloride is added. The dark brown solution is concentrated to one-half its volume on a hot plate and is then evaporated to dryness on a steam bath. This evaporation removes excess hydrochloric acid, which if allowed to remain leads to contamination of the tetra-amminepalladium(II) tetrachloropalladate(II) with the isomeric hydrochloric acid also prevents loss of product owing to... 

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