Neodymium acetate

P. K. Migal and N. G. Chebotar, Russ. J. Inoi. Chem., 16, 625 (1970). Cerium, Praaqueous ethanol solutions. 

A monomeric (and anhydrous) neodecanoate (= NDH) was obtained from the ligand exchange reaction between hydrated neodymium(III) acetate Nd(0Ac)3(H20)6 and neodecanoic acid (Scheme 14). The coordination sphere of the large neodymium cation is saturated by an additional molecule of neodecanoic acid, as evidenced by MALDI-TOF mass spec-... 

Scheme 14 Synthesis of oligomeric (ND) and monomeric neodymium(III) neodecanoates (NDH) from hydrated neodymium chlorides and acetates [124]...

Synthesis. Ammonium sulfite monohydrate, 4,4 -bipyridyl, 1,4-diazabicyclo[2.2.2]octane (DABCO), neodymium(III) nitrate hexahy-drate (Aldrich), 1,10-phenanthroline, ethylenediamine (SD Fine, India), and zinc acetate dihydrate (Qualigens, India) of high purity were used for the synthesis. 

The neodymium salt, Ndg(U304(,)3.18H20, is formed as a yellow crystalline powder when neodymium hydroxide is heated with a solution of uranyl acetate on a water-bath. Praseodymium hydroxide behaves in the same way. ... 

The lutetium hahdes (except the fluoride), together with the nitrates, perchlorates, and acetates, are soluble in water. The hydroxide oxide, carbonate, oxalate, and phosphate compotmds are insoluble. Lutetium compounds are all colorless in the solid state and in solution. Due to its closed electronic configuration (4f " ), lutetium has no absorption bands and does not emit radiation. For these reasons it does not have any magnetic or optical importance, see also Cerium Dysprosium Erbium Europium Gadolinium Holmium Lanthanum Neodymium Praseodymium Promethium Samarium Terbium Ytterbium. 

Neodymium oxide was first isolated from a mixture of oxides called didymia. The elemeut ueodymium is the secoud most abuudaut lanthanide elemeut in the igneous rocks of Earth s crust. Hydrated neodymium(III) salts are reddish and anhydrous neodymium compounds are blue. The compounds neodymium(III) chloride, bromide, iodide, nitrate, perchlorate, and acetate are very soluble neodymium sulfate is somewhat soluble the fluoride, hydroxide, oxide, carbonate, oxalate, and phosphate compoimds are insoluble. 

Catalysts on the basis of complexes of cobalt or iron salts [e.g., cobalt(II) chloride/ pyridine, cobalt(II) acetate/AlR2Cl] yield mixed structures with more than 20% 1,2 double bonds and rubber elastic-like polymers [325,326]. Rare earth catalysts have also been described [327]. A crystalline c/ -1,4 polymer with a melting point of 198°C and a molecular weight of 100 000 is obtained with aluminum alkyls/neodymium compounds at a molar ratio of 31 1. The yield is in the range of 30%. Cobalt(II) acetate in combination with diethylaluminum chloride or rhodium salts also yields a cis-, A polymer [328,329]. 

Redox reactions. The chemical reduction of metal salts by sodium boron hydride is a common procedure in the preparation of metals and metal alloys. Nanoparticles of iron, FeZrB, FeCoB and FeCoB have been obtained from the corresponding sulphate salts, and NdFeB compounds from neodymium and iron chloride salts. Cobalt nanoparticles have been prepared from cobalt acetate using 1,2 dodecanediol as a mild reducing agent. FePt nanoparticles are produced by the decomposition of iron pentacarbonyl and the reduction of platinum tetrachloride complexes in an organic solvent. Redox reactions can also be produced by electrochemical methods, or in the solid phase. ... 

Following is an example for the preparation of NdCoOs perovskite by freeze-drying method [30] 0.005 mol neodymium sesquioxide was first dissolved in 5 rrrl of concentrated nitric acid, and then added to a solution of 0.01 mol of cobalt (II) acetate in 25 ml of water. The pH of the resulting solution was adjusted to 4.5 by addition of dilute ammorria. Finally, the resulting reddish solution were frozen in liquid N2 and transferred into a freeze-dryer operated at a pressure of 7.6 torr. The resulting blue-pink powder was placed into an alurttina boat and pretreated at 400 °C for 2 h under vacuum. The "ashes" were finally groimd and treated for 24 h under a dynamic oxygen atmosphere at 700 and 900 °C. 

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