Stannic bromide

Halides. The tin haUdes of the greatest commercial importance are stannous chloride, stannic chloride, and stannous fluoride. Tin hahdes of less commercial importance are stannic bromide [7789-67-5], stannic iodide [7790-47-8], stannous bromide [10031-24-0], and stannous iodide [10294-70-9] ( ) ... 

SiHcon tetrabromide [7789-66A], SiBr, and tribromosilane [7789-57-3], SiHBr, are used in a process to make high purity siHcon (40). Stannous bromide [10031 -24-0], SnBr2, is claimed as a catalyst in preparing a lubricant antioxidant (41). Stannic bromide [7789-67-5], SnBr, is used in the metallurgical separation of minerals (42). 

Sodium hydroxide cc NaOH -1-10.18 Stannic bromide aq SnBr4 +15.5... 

The gas or liq may attack organic matter with expl violence (Ref 11). Instances of violent reactions with ammonia, sulfur trioxide, stannic bromide and iodide are documented (Ref 12)... 

The extent of the ionization produced by a Lewis acid is dependent on the nature of the more inert solvent component as well as on the Lewis acid. A trityl bromide-stannic bromide complex of one to one stoichiometry exists in the form of orange-red crystals, obviously ionic. But as is. always the case with crystalline substances, lattice energy is a very important factor in determining the stability and no quantitative predictions can be made about the behaviour of the same substance in solution. Thus the trityl bromide-stannic bromide system dilute in benzene solution seems to consist largely of free trityl bromide, free stannic bromide, and only a small amount of ion pairs.187 There is not even any very considerable fraction of covalent tfityl bromide-stannic bromide complex in solution. The extent of ion pair and ion formation roughly parallels the dielectric constant of the solvents used (Table V). The more polar solvent either provides a... 

Terada et al. [166] determined 0.3-lppm selenium in marine sediments after converting the element to stannic bromide which was distilled off and assayed colorimetrically as piazselenol. 

STANNIC BROMIDE STANNOUS CHLORIDE STANNIC CHLORIDE STANNIC HYDRIDE STANNIC IODIDE STRONTIUM STRONTIUM OXIDE TANTALUM TECNNETIUM TELLURIUM... 

STANNIC BROMIDE 62.0925 -4.1212E+03 -2.1351E+01 1.6385E-02 -5.2861E... 

No ammino-derivatives of stannic bromide are known, but derivatives of the iodide exist. 

Probably the first isolation of a triphenylmethyl carbocation salt was by Gomberg and Cone (68) who successfully prepared the perchlorate from the corresponding chloride. A direct synthesis from the carbinol was achieved at about the same time (69), and more recently the preparation of the perchlorate and tetrafluoroborate have been much improved (70). Anderson (7/) succeeded in recording the characteristic visible absorption spectrum of the ion in concentrated acids, and Fairbrother and Wright (72) observed the same absorption when triphenylmethyl bromide was ionised in benzene in the presence of stannic bromide. 

Arsenic triiodide also dissolves, the saturated solution at 15° C. having density 3-661. Other soluble halides are potassium bromide, anhydrous ferric and aluminium chlorides 6 and tetramethyl ammonium iodide but the iodides of rubidium, cadmium, manganese and cobalt, also mercuric and stannic iodides, and cobalt and stannic bromides, are insoluble or only very slightly soluble in arsenic tribromide. The liquid also dissolves phosphoryl bromide and, very slightly, ammonium thiocyanate. In the mixed solutions of halides, the components may react chemically (cf. p. 106), but such is not always the case for example, with antimony tribromide a continuous series of solid solutions is formed.7... 

Trimethyl tellurium bromide, (CH3)3TeBr, is obtained from the /3-base and hvdrobromic acid. It forms large, transparent, colourless tablets, slowly decomposing between 250° and 280° C., readily soluble in cold water but almost insoluble in organic solvents. The neutral solution in water contains bromine ions, and gives no precipitate or coloration with colourless hydriodic acid. It unites with ferric chloride. giving a complex which crystallises as salmon-coloured needles and forms a complex salt with stannic bromide. 

An analogous cation has been isolated for the diarsine derivative, namely [W(CO)4(diars)I]+ (181). The reaction of stannic bromide with Mo(CO)4 (diars) [and W(CO)4(diars)] appears to proceed in a similar way, so that an unstable mixed metal cation [Mo(CO)4(diars)SnBr3]+Br3 is produced, which decomposes to (diars)Mo(CO)2Br3 (179). 

There are two series of compounds of tin and the halogens those related to stannous oxide, SnO, in which the metal has a valence of 2 (stannous salts), and those related to stannic oxide, Sn02, in which it has a valence of 4 (stannic salts). The compounds with lower valence are usually prepared by the action of the halogen acids on the metal. Stannous chloride, for example, is formed when hydrochloric acid reacts with tin. Stannic salts, on the other hand, are prepared by the reaction of tin and the free halogen. In this preparation stannic bromide results from the reaction of bromine and tin. The reaction between the two ele-... 

The product should be colorless. If a satisfactory result is not obtained, the stannic bromide may be redistilled from a clean, dry flask, to which one or two small pieces of tin have been added. 

Make a solution of stannic bromide by mixing in a graduated cylinder 1 cc. of your preparation of anhydrous stannic bromide, 4 cc. of 6iV HC1, and 15 cc. of water. Shake the mixture until solution is complete. Use this solution for the following tests. 

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