Indium bromide

Interaction at 350°C is so vigorous that it is unsafe to increase the scale of this preparation of indium bromide. 

Dibromogermane, 0267 Germanium tetrachloride, 4162 Gold(III) chloride, 0111 Indium bromide, 0289 Iridium hexafluoride, 4362 Iron(II) bromide, 0266 Iron(III) bromide, 0286 Iron(II) chloride, 4061 Iron(III) chloride, 4133 Iron(II) iodide, 4395... 

Clark, R. J. et ai, Inorg. Synth., 1963, 7, 19—20 Interaction at 350°C is so vigorous that it is unsafe to increase the scale of this preparation of indium bromide. 

The indium carbene derivatives were prepared from a THF solution at room temperature. The reaction of excess carbene to the InX3 (5 1) only afforded the 2 1 adduct and unreacted carbene, which suggested that higher adduct formation was not sterically viable. X-ray crystallography showed the 1 1 indium bromide adduct to be monomeric and tetrahedral... 

Indium trichloride induces rearrangement of aryl-substituted epoxides to the respective aryl-substituted acetaldehydes via an exclusive hydride shift As phenyl group migration occurs more readily than hydride migration, stilbene oxide is converted to diphenylacetaldehyde (Scheme 8.140) [184]. N-Tosyl aziridines react smoothly with carboxylic acids in the presence of a catalytic amount of indium triflate to afford the corresponding -aminoacetates and benzoates (Scheme 8.141) [185]. Indium trichloride and indium bromide catalyze regio- and diastereoselective azidolysis, bromolysis, and iodolysis of a, -epoxycarboxylates in water (Scheme 8.142) [186]. 

The indium bromide complex [6,7] can be extracted into diethyl ether from 4.5-5.5 M HBr (-40%). When extraction with DIPE is applied, the concentration of HBr should be -6 M. The selectivity of In extraction from a bromide medium is lower than that from iodide solutions. Ga, Fe(III), Sb(V), Au(III), Tl(III), Sn, and Mo are extracted with indium. Indium can be stripped with water from the ether extract. 

Reactions with otP-Unsaturated Ketones, Nitriles and Nitro-Compomds Such reactions are usually effected using acid (see below), or one of a number of mild Lewis acids, such as scandium iodide (with microwave heating), indium bromide " or hafnium triflate, and can be looked on as an extension of the reactions discussed in 20.1.1.6. In the simplest situation, indole reacts with methyl vinyl ketone in a conjugate fashion in acetic acid/acetic anhydride. ... 

Another concept is based on neutral, polyfunctional Lewis-acid spacers for the construction of stair and ladder structures [103]. Ortho-phenylene(indium-bromide) 48 exists as a THF stabilized dimer. The p-orbitals at indium are orientated perpendicular to the diindacyclus. Reaction of 48 with pyrazine in a molar ratio of 1 1 or 1 2 in THF results in the stair-structured molecule 49 whereas in a molar ratio of 1 4 the ladder-structured 50 (both contain additional THF) is obtained (Fig. 7-11). The polymers are insoluble in nonpolar solvents... 

Figure 7-11. Molecular structure of ortho-phenylene/indium-bromide 48 and its coordination polymers 49, 50 by reaction with pyrazine.

Indium bromide was found to catalyze the formation of polyhydroxyl pyrrole 34 from pyranone 33 and aniline. The reaction is proposed to proceed via the ring expansion of an iminocyclopropane followed by intramolecular attack of the resulting oxonium species. Pyrrole 34 is generated in one-pot in good to excellent yields and can be obtained with either an N-aryl or AT-alkyl group (130L3852). 

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