Nickel-ethylene diamine

Aerosil was converted into the sodium form by treating it with a buffer solution (pH = 8.4) made of sodium hydroxide and sodium hydrogen carbonate solutions, after which it was filtered, washed free of alkali, and dried. This sodium-exchanged aerosil was then suspended in a solution of Ni(en)3(N03)2 prepared by adding the calculated amount of ethylene-diamine to a solution of nickel nitrate. The suspension was agitated for about 30 min and filtered off. The catalyst was then washed and dried at 100°C. 

Tri-ethylene diamine nickel hydroxide [Ni(en)3](OH)2 Nioxen Good solvating properties, extensive oxidative degradation, coloured (violet)... 

Electronic spectra have been recorded for the 1,5-pentamethylene-tetrazole adducts MX2(l,5-pmtta) (M = Mn, Fe, Co, Ni, and Cu X = Cl and Br) (32) and for the complex salts [M(l,5-pmtta)6][C104]2 (M = Fe, Co, Ni, and Cu) (51, 52). Data for the complex salts indicate that 1,5-pentamethylenetetrazole is a stronger ligand than ethylene-diamine in the nickel(II) system but only slightly stronger than water in cobalt(II) complexes (51). 

Ube proposes a totally different process from the above, starting with cydohexanone. In the first step, cyclohexanone is converted to l.r-peroxydicydohcxylamine by the action of hydrogen peroxide and ammonia, in the presence of the ammonium salt of an organic acid and a peroxide stabilizer (zinc and nickel salt of ethylene diamine tetracetic... 

Commercial liquid soap added with L-histidine was found to be more effective than the untreated soap. Similarly sodium-ethylene diamine tetraacetic acid (EDTA) salt or L-histidine added to phosphate buffer saline solution was more effective in cleaning nickel contaminated human skin than the phosphate saline alone. 

The La-M heterobinuclear complexes noted LaxM(fsa)2en,N03.H20 were synthesized according to the methods previously described using nickel or copper acetates (Aldrich, 98%), lanthanum nitrate (Janssen, 98%) and N,N -Bis(3-carboxysalicydene)ethylene diamine (noted (fsa)2en) as a ligand ([5], [6], [7]). M (Ni2+ or Cu " ") was introduced at first in sodium carbonate medium, whereas La was complexed in a second step in Li0H/CH30H medium. 

The kind of the complexing group used in the first step of the synthesis also has a pronounced influence on the resulting metal particle diameters. The mean particle diameter in Ni 15 Si02 decreases from 22.9 nm to 2.6 nm (same reaction conditions during step 2 and 3), if the acetylacetone derivative [CH3(0)C]2CH-(CH2)3Si(OR)3 is used for the complexation of the nickel ions during sol-gel processing instead of the ethylene diamine derivative DIAMO. 

A review has appeared on the synthesis and reactivity of (sUylamino) and (silyl-anilino)phosphines. The S5mthesis, derivatisation and coordination behaviour of the morpholine (69) and piperazine (70) derivatives have been described. They are formed from the appropriate amine with diphenylchlorophosphine, and both react with sulfur or selenium to give the chalcogenide, whilst reaction of (69) with paraformaldehyde leads to insertion of methylene into the P N bond to give the phosphine oxide. The reaction between ethylenediamine and diphenylchlorophosphine can lead to the bis-, tris- and tetrakis(diphenylphosphino)ethylene-diamines, depending upon the stoichiometry. The first two are oxidised in situ whist the latter, (71), is stable. A nickel complex of (71) has been shown to be active as a catalyst for ethylene pol5nnerisation. ... 

The classical method of epimerisation, the Lobry de Bruyn - Alberda van Ekenstein rearrangement has been treated by S. Angyal, the expert in the field of free sugars and their interconversions. L. Petrus and co-authors have contributed a first-hand experience based chapter on the Bflik reaction, which was discovered in Bratislava and is an important approach to rare sugars on a commercial basis. Another, more recently developed method, the epimerisation of free sugars catalysed by nickel (II)/ethylene diamine complexes, has been reviewed by S. Osanai. 

Tu H, Mao L, Cao X, Jin L (1999) A novel electrochemical microsensor for nitric oxide based on electropolymerized film of o-aminobenzaldehyde-ethylene-diamine nickel. Electroanalysis 11 70-74... 

Consequently, new dilithium-nickel-olefin complexes with tetra- or pentacoordinated nickel atoms are formed, e.g., the Li2Ni complexes Li2Ni[(CH3)2NCH2CHCHCH2N(CH3)2]3 (18), (LiTMEDA)2Ni(C2H4)3 (19), (LiTMEDA NifCVHw (20), and (LiTHF)2Ni(C4H6)3 (21), by reaction with N,N,N, TV -tetramethy lbutene-2-diamine, ethylene, norbor-nene, or butadiene (14, 31-33). 

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