Copper, tris salts sulfate

Tris-(2-imidazolidinethione)copper(I) acetate and sulfate have similarly been obtained by reducing the appropriate copper(II) salt with the ligand in water. They are presumably ionic since solutions of the latter gave an immediate precipitate of BaS04 when treated with BaCl2 249). Tris (0-ethylaminothioformate)copper(l) chloride 101, 299) and bromide 299) have been prepared from the copper(I) salts. 

Kobayashi and coworkers showed that Lewis add surfactant-combined catalysts such as scandium tris(dodecyl sulfate), Sc(03SCi2H25)3, or copper bis(dodecyl sulfate), Cu(03SCi2H25)2, were efficient catalysts for the three-component Mannich-type reaction, with 73-95% yield being obtained in neat water.Neutral salts such as sodium triflate and sodium iodide catalyzed the condensation reaction in water between preformed imines and silicon enolates, or the three-component Mannich-type reaction using aromatic amines, with 49-93% yields and 0-80% diastereoselectivities. Mechanistic studies indicated that both sodium triflate and the Mannich adduct itself cooperatively promote the reaction. 

The [Cr(en)3]2+ and [Cr(pn)3]2+ salts have reflectance spectra (Table 11) resembling those of the hexaammines, and the six N donor atoms are assumed to complete tetragonally distorted octahedra around the metal. Stability constant measurements (Table 39) have shown that the ions [Cr(en)(aq)]2+ (vmax= 18 300 cm-1, e = 25 dm3 mol-1 cm-1) and [Cr(en)2(aq)]2+ (vma = 17 500 cm-1, e = 17 dm3 mol-1 cm-1) exist in aqueous solution, but that, as in the copper(II) system, the third ethylenediamine molecule is only weakly bound, and care is needed to prevent loss of en from tris(amine) complexes in the preparations. Several bis(amine) complexes, e.g. [CrBr2(en)2], have been isolated, and these are assigned trans structures because of IR spectral resemblances to the corresponding oopper(II) complexes. Since the spectrum of [Cr(S04)(en)2] also shows the presence of bidentate sulfate, this is assigned a trans octahedral structure with bridging anions. 

Other chemicals tried in the two decades between 1920 and 1940 include sodium or calcium chlorate, mineral oils, rock salt, copper sulfate, creosote, and ammonium thiocyanate. These latter compounds while tried never showed enough promise to be widely used (1,2). 

SODIUM SALT of HYDRAZOIC ACID (26628-22-8) Reacts with hot water. Explosive decomposition in elevated temperatures above 525°F/274 C. Forms ultra-sensitive explosive compounds with heavy metals copper, its alloys, lead, silver, and mercury, carbon disulfide, tri-fluoroacryloyl fluoride. Violent reaction with acids, forming explosive hydrogen azide. Violent reaction with bromine, barium carbonate, chromyl chloride, dimethyl sulfate, dibromomalonon-itrile. Incompatible with caustics, cyanuric chloride, metal oxides, metal sulfides, methyl azide, phosgene. 

Poly-4-vinylpyridine complexes of copper(II) catalyze the oxidation of thio salts such as sulfites (SO ), thiosulfates (S2C ), dithionates (8204"), disuintes (8205 ), tri-thionate (83O6"), tetrathionates (S4C ), by molecular oxygen to sulfate ions [84- 86]. 

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