Dysprosium trichloride

Sharipov GL, Gainetdinov RKh, Abdrakhmanov AM (2008) Effect of argon on the multibubble sonoluminescence of cerium, terbium and dysprosium trichlorides. Russ Chem Bull 57(9) 1831-1836... 

G. Lanza, Z. Varga, M. Kolonits, M. Hargittai, On the Effect of 4f Electrons on the Structural Characteristics of Lanthanide Trihalides. Computational and Electron Diffraction Study of Dysprosium Trichloride. J. Chem. Phys. 2008, 128, 074301-1-14. 

Dysprosium is relatively unreactive at room temperatures. It does not oxidize very rapidly when exposed to the air. It does react with both dilute and concentrated acids, however. For example, it reacts with hydrochloric acid to form dysprosium trichloride. 

In this work, semilogarithmic plots over the temperature range 770-1009 K are given for DyQs calculations by the second law were not performed because this interval covers saturated vapor pressures for both the sublimation of the a polymorph and vaporization of liquid dysprosium trichloride. 

Roesky introduced bis(iminophosphorano)methanides to rare earth chemistry with a comprehensive study of trivalent rare earth bis(imino-phosphorano)methanide dichlorides by the synthesis of samarium (51), dysprosium (52), erbium (53), ytterbium (54), lutetium (55), and yttrium (56) derivatives.37 Complexes 51-56 were prepared from the corresponding anhydrous rare earth trichlorides and 7 in THF and 51 and 56 were further derivatised with two equivalents of potassium diphenylamide to produce 57 and 58, respectively.37 Additionally, treatment of 51, 53, and 56 with two equivalents of sodium cyclopentadienyl resulted in the formation of the bis(cyclopentadienly) derivatives 59-61.38 In 51-61 a metal-methanide bond was observed in the solid state, and for 56 this was shown to persist in solution by 13C NMR spectroscopy (8Ch 17.6 ppm, JYc = 3.6 2/py = 89.1 Hz). However, for 61 the NMR data suggested the yttrium-carbon bond was lost in solution. DFT calculations supported the presence of an yttrium-methanide contact in 56 with a calculated shared electron number (SEN) of 0.40 for the yttrium-carbon bond in a monomeric gas phase model of 56 for comparison, the yttrium-nitrogen bond SEN was calculated to be 0.41. 

Croat, J.J., 1969, The preparation of high purity dysprosium, holmium and erbium by the lithium reduction of their trichloride salts. Report No. lS-T-346 from Ames Laboratory - ERDA, Iowa State University, Ames, Iowa 50011. 

The analysis of theoretical calculations performed for lanthanum trichloride shows that, in spite of the use of different calculation procedures, all authors except Adamo and Maldivi (1997,1998) and Vetere et al. (2000) report Vi frequencies lying below V3. This prompted us to carefully analyze the work by Loktyushina et al. (1984) and the FUR spectra of neodymium, dysprosium, and thulium trichlorides reported by Feltrin and Nimziante-Cesaro (1996). 

Usually, trends in AatH°(298) variations depending on the atomic numbers of lanthanides are considered. This dependence, however, has the form of a broken line with maxima at lanthanum, gadolinium, and lutetium and minima at europium and ytterbium. In addition, an increase in AatH°(298) is usually observed when going from dysprosium to erbium compoimds. A smoother dependence on the atomic number of lanthanides was obtained for the enthalpies of sublimation of lanthanide trifluorides and trichlorides. We believe that the use of this feature allows Asubhf°(298) values to be predicted more accurately for separate lanthanide dichlorides. Accordingly, the reliability of all the thermodynamic data can then be estimated. 

Scandium trichloride possesses the rhombohedral FeClj-type structure. The trichlorides of lanthanum through gadolinium possess the hexagonal UClj-type structure (Coordination Number of lanthanide CN = 9). Terbium chloride and a-DyCljpossess the orthorhombic PuBtj-type structure (CN = 8), while the trichlorides of yttrium and those of dysprosium ( 5-form) to lutetium possess the monoclinic AlClj-type structure (CN = 6). 

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