And 1942 9813 and thbr thbr
[PDF File]Rerefinement of the crystal structure of α-ThBr4
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The closest Th Th distance of 4.77179 (12) A ̊ in -ThBr4 is shorter compared to -ThBr4, with a value of 4.8774 A ̊ (Brown et al., 1973). In the crystal structure of -ThBr4, each Th atom is surrounded by eight other Th atoms in the shape of an irregular polyhedron, with Th Th distances of 4 .
[PDF File]Convenient access to the anhydrous thorium tetrachloride ...
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For non-aqueous thorium chemistry, ThBr 4(THF) 4 and ThCl 4 have been the most commonly used precursors, but their syntheses suffer from several inconvenient drawbacks, which have, in turn, greatly hampered progress in thorium research. For example, the synthesis of ThBr 4(THF) 4 requires thorium(0) metal, a material available at only a small ...
[PDF File]Ottawa, C anada.
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ThBr3.27 ThBr2.23 % Total Residue 212.43(a) 176.69(a) % Methanol-Insol. 23.3(b) 34.5
A Simple Access to Pure Thorium(IV) Halides (ThCl 4 , ThBr 4 ...
Abstract. In this work we present a facile, lab scale synthesis for thorium tetrahalides ThX4 (X = Cl, Br, and I). The reaction between the easily available ThO2 and AlX3 (X = Cl, Br, and I) and a subsequent in situ chemical vapor transport (CVT) leads to a product of high purity, which is obtained in the form of crystals or large aggregates of
[PDF File]Observation of a Phase Transition in ThBr, and ThCI, Single ...
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phase transitions of ThBr, and ThCI, at 95 and 70 K, respectively. The splitting observed for the strongest E, symmetry mode shows a lowering of the symmetry below the transition point. Powder X-ray diffraction at 77 K of hygroscopic ThBr, is being carried out to determine the low-temperature structure.
In Search of Tris(Trimethylsilylcyclopentadienyl) Thorium
a product, eqn (1). The Cp′3ThMe precursor in eqn (1) was prepared from Cp′3ThBr and MeLi and was crystallographically characterized (vide infra, Fig. 5). Reaction of Cp′3ThBr with KC8 in THF at −35 °C generates a dark blue solution, A, and a black precipitate, presumably graphite, eqn (2). The solution displays an axial EPR signal at
Laboratory Thyroid Tests: A Historical Perspective
Ratio’’ (THBR) tests.27 Current THBR methods use different scavengers, formula-tions,calculations, and reference ranges. For practical reasons earlyTHBRtestsused125I-T3inpreferenceto125I-T4because T3 has a lower affinity for TBG than T4 resulting in a higher uptake of isotope onto the scavenger,28 necessitating a shorter isotopic count time.
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