Thorium bromides

Comparable with the chloride system, complex ions of the form M2 ThX3] (A =Br [44490-064], M = (CH3) N, (C2H3) N X = I [44490-18-8], M = (C2H3) N, (CH3)3C3H3N) are known where the metal center is octahedral. Additional information on thorium bromides and iodides can be found in the hterature (81). 

The method described below for the preparation of thorium bromide combines the method of Troost and Ouvrard3 with that of Moissan and Martinsen.2 The former passed bromine over a heated mixture of thorium dioxide and carbon but did not purify the thorium bromide formed. The latter prepared the halide by the action of bromine on heated thorium carbide and purified the product by sublimation, first in a current of hydrogen and... 

Considerable thorium bromide is carried along with the nitrogen, even through the protecting tube of calcium chloride, if the flow of nitrogen through the apparatus is too fast. As the reaction proceeds, the thorium bromide collects at the end of the silica tube as a powder and in large... 

Thorium bromide is a white crystalline solid the density of which is about 5.6. It is hygroscopic and is very soluble in water and in certain organic liquids such as ethyl alcohol and ethyl acetate. It is attacked by fluorine and, when heated, by chlorine and by oxygen. On exposure to light, it is attacked by oxygen. 

Thorium bromide is hydrolyzed in water, but it is possible to obtain hydrates of the salt by the evaporation of aqueous... 

Thorium bromide is insoluble in liquid ammonia but forms the molecular compounds containing, respectively, per mol of bromide, 20, 14, 10, and 3 mols of ammonia.7,8... 

Tellurium hexafluoride, 121 Tetrabromosilane, 38, 40 Tetrapyridino-ferrous chloride, 184 Thiocyanogen solution, 84, 86 standardization, 86 Thionyl bromide, 113 Thorium bromide, ammines, 54 anhydrous, 51... 

Thorium bromide, hydrates, 53 Thorium oxybromide, 54 Triazoates, 79 Tribromosilane, 38 analysis of, 41 Trinitrides, 79 Trioxalato salts, 35... 

Ammoniates (cont.) of iron(II) bromide, 4 161 nomenclature of, 2 264 of thorium acetylacetonate, 2 125 of thorium bromide, 1 54 See also Am mines)... 

Vin.3 Bromine compounds and complexes VIII.3.1 Solid and gaseous thorium bromides VIIL3.1.1 ThBr(g), ThBr2(g), ThBr3(g)... 

Evidence for the existence and properties of the lower thorium bromides ThBr3(cr) and ThBr2(cr) is limited. 

In his early study covering a large number of halides and oxyhalides of thorium and their hydrates, Chauvenet [1911CHA] reported a value of -293.67 kJ moT for the enthalpy of solution of ThBr4(cr) in ca. 16000 H2O, probably at 288 K. Use, as discussed in Appendix A, of the values adopted by this review (Table VII-15) for the hydrolysis of the thorium ion and of that for the formation of the first thorium bromide complex (Section VIII.2.2) leads to a dissolution reaction that can be written as ... 

VIII.3.2 Aqueous thorium bromine compounds VIIL3.2.1 Aqueous thorium bromide complexes... 

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