Cadmium nitrate, catalysts

The same group also reported that when cadmium nitrate or perchlorate salts were used in the preparation of the MOF, two different MOF structures can be obtained with the same chiral binaphthyl ligand [130]. This diversity in crystal structures seemed to arise from the participation of the anion accompanying Cd " " in the structure. The chiral MOF prepared from nitrate acts as an efficient heterogeneous catalyst for the room-temperature asymmetric addition of diethylzinc to a series of aromatic aldehydes, with ee values up to 90% at 100% substrate conversion. Conversely, the MOFs derived from the perchlorate salt were inactive under the same conditions. 

Quite a few excellent reviews on catalysis by MOFs can be recommended to the reader [32,67]. One of the earliest reports on MOF-based catalysis by Fujita et al. [55] concerned the cyanosilylation of aldehydes in the presence of a 2D MOF based on 4,4 -bipyridine and cadmium nitrate Cd(4,4 -bpy)2(N03)2, which does not possess permanent porosity. The substrate size and shape selectivity was observed in the presence of this catalyst. The active... 

Nickel nitrate is used in the preparation of nickel-impregnated catalysts. It also is used to make nickel plates in nickel-cadmium batteries. Other apph-cations are in ceramics to produce brown colors and in preparing nickel oxide. 

Among the simple catalysts that have been proposed oxides of zinc,09 cadmium, lead, bismuth, silicon, aluminum, titanium may be mentioned.5,0 Alkaline materials as sodium or calcium carbonates have also been claimed. The zinc oxide catalyst is prepared by spraying a solution of zinc nitrate, alone or with nitrates of other metals, on pumice and then heating the product in air. In practice the phthalic anhydride is simply steam dis-stilled into the reaction chamber and the products separated by fractional condensation or selective solution. 

With the exception of Cat 1 (Cu/Cr= 33 67, as atomic ratio, i.e. with a composition corresponding to the stoichiometric spinel), all samples contain 50% chromium. In samples 3, 4, and 5, 20% of the copper ions was replaced by 2anc cadmium and magnesiinn ions, respectively. All catalysts were prepared by coprecipitation at pH 8.0 0.1 from a solution of nitrates of the elements with a shght excess of NaHCOs, washed until the sodium concentration was lower than... 

Only about 6% of the produced nickel is applied for the production of nickel compounds. An important one is nickel hydroxide [Ni(OH)2], which is used for nickel-cadmium and nickel-iron batteries. For the production of catalysts the hydroxide, nitrate, sulfate, formate, and carbonate of Ni are used. In the pigment industry nickel oxide, hydroxide, and phosphate are applied and for electroplating nickel sulfate, sulfamate, and tetrafluoroborate are used. 

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