Aluminum bromide, reaction with oxygen

Mole ratios You have seen that the coefficients in a chemical equation indicate the relationships among moles of reactants and products. For example, return to the reaction between iron and oxygen described in Table 12-1. The equation indicates that four moles of iron react with three moles of oxygen. It also indicates that four moles of iron react to produce two moles of iron(III) oxide. How many moles of oxygen react to produce two moles of iron(III) oxide You can use the relationships between coefficients to write conversion factors called mole ratios. A mole ratio is a ratio between the numbers of moles of any two substances in a balanced chemical equation. As another example, consider the reaction shown in Figure 12-2. Aluminum reacts with bromine to form aluminum bromide. Aluminum bromide is used as a catalyst to speed up a variety of chemical reactions. 

In support of this hypothesis it has been observed that when aluminum bromide is treated with oxygen a reaction occurs which liberates bromine,48 and further, the halogen atoms rather than the hydroxyl group are responsible for the catalytic activity of HOAlBr2. Thus when the compound DOAlBr2 is prepared, the hydrogen-deuterium exchange with n-butane is not at all proportional to isomerization.4 ... 

CARBON BROMIDE (558-13-4) Violent reaction with fluorine, hexylcyclohexyldilead, oxygen, potassium, potassium acetylene-1,2-dioxide, sodium azide, uranium(III) hydride. Mixtures with finely divided aluminum, lithium, magnesium, potassium-sodium alloy, titanium, zinc can form a friction- or shock-sensitive explosive material. Incompatible with decaborane. Attacks active metals. 

A quantitative study was made of the products resulting from the reaction of air with aluminum bromide dissolved in n-butane in molal proportions C4Hio/AlBrs/Oj=100/9.5/0.30. It was found that all of the oxygen entered the reaction the gases which were pumped off, to 10 nun. of mercury at liquid nitrogen temperature, consisted of 95% nitrogen and... 

The action of aluminum bromide on n-heptane, using highly purified materials and controlled conditions, has been studied (Grummitt et al., 42). Aluminum bromide, rather than aluminum chloride, was selected as a catalyst because its hydrocarbon solubility permits the initial reaction to be homogeneous. The reaction was carried out in a flask which was evacuated, flamed, and rinsed dry with oxygen-free nitrogen. The aluminum bromide... 

Water reactive materials are those that react violently with water. Alkali metals (e.g., hthium, sodium, and potassium), many organometallic compounds, and some hydrides react with water to produce heat and flammable hydrogen gas, which can ignite or combine explosively with atmospheric oxygen. Some anhydrous metal halides (e.g., aluminum bromide), oxides (e.g., calcium oxide), and nonmetal oxides (e.g., sulfur trioxide) and halides (e.g., phosphorus pentachloride) react exothermically with water, and the reaction can be violent if there is insufficient coolant water to dissipate the heat produced. 

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