Dysprosium nitrate

Dysprosium nitrate [Dy lNO l ] is a strong oxidizing agent and will ignite when in contact with organic material. Most dysprosium salts are toxic if ingested or inhaled. 

A similar approach used 4% v/v p-dioxane in a D2O solution of 0.04 M dysprosium nitrate in acetic acid/acetate buffer at pH 5.2. The dependence of the chemical shift separation between the p-dioxane and the acetate methyl resonances was measured to be 0.17 ppm K. ... 

Obtained in two steps First, a mixture of 3-hydroxy-acetophenone and dysprosium nitrate in ethyl acetate were refluxed (85-105°) for 75 min. Then, the isolated intermediate (CgHgNO )3Dy (59%) was dissolved in 6 N hydrochloric acid (50%) [2095]. 

At the end of the 19th century, Urbain, using the fractional crystallization method, prepared 60g of dysprosium oxide after 10,000 crystallizations then, in 1907, after 15,000 successive nitrate crystallizations from nitric solution, he separated lutetium and ytterbium. 

The chemical composition of rare earth complexes cannot by itself reveal the coordination number of the central metal ion. There are many complexes containing hydrated water molecules and coordinated water molecules. The nitrilotriacetic acid (NTA) complexes of Pr and Dy have the formulae PrNTA 3H2O and DyNTA 4H2O, respectively. The praseodymium complex is a nine-coordinate system with one molecule of water in the hydrated form [12] and the dysprosium complex is eight-coordinate with two molecules of water of hydration [13]. These structures cannot be predicted from the composition of the complexes. The complex Nd(N03>3 4DMSO is ten-coordinate [14] since the nitrate... 

Treatment of 133 with d prosium nitrate in the presence of oxygen and base then gave the dysprosium (III) containing texaphyrin 159 (Scheme 21). The hyperfine Na NMR shift induced by 159, of 0.86 ppm, is nearly identical to that induced by a simpler texaphyrin-free Dy (III) tetraazatetraoxo macrocyclic complex which binds sodium in the crown ether portion of the macrocycle [111]. The shift direction observed for the Na caused by 159 is also consistent with the Na cation being bound perpendicular to the principle magnetic axis. 

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. 

The NTA complexes of praseodymium and dysprosium serve as examples of the former problem. These two compounds which have the formulae PrNTA-3H20 and DyNTA-4H 0 contain nine-coordinate praseodymium with one water of hydration (Martin and Jacobson, 1972a) and eight-coordinate dysprosium with two water molecules of hydration (Martin and Jacobson, 1972b). It is clear that neither of these is predicted by the stoichiometry of the complexes. The second problem is illustrated by the complexes R(N03)3-mDMSO ( = 3 or 4). The complex Nd(N03)3 4DMSO (Aslanov et al., 1972b) has all the nitrate ions coordinated in a bidentate fashion which results in overall ten-coordination. The complex Lu(N03)3-3DMSO (Aslanov et al., 1973) also has all three nitrate ions coordinated and the lutetium is nine-coordinate. 

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