Aluminium perchlorate

Mixtures of the sulfoxide with metal salts of oxoacids are powerful explosives. Examples are aluminium perchlorate, sodium perchlorate and iron(III) nitrate [1], The water in hydrated oxosalts (aluminium perchlorate, iron(III) perchlorate, iron(III) nitrate) may be partially or totally replaced by dimethyl (or other) sulfoxide to give solvated salts useful as explosives [2], Metal nitrates and perchlorates solvated with DMSO are generally powerfully explosive, and under certain conditions a violent reaction is easily triggered [3], Several other explosions involving perchlorates and the sulfoxide have been reported. 

Whether mixtures of the perchlorate with aluminium truly detonate is under debate. However, appropriate compositions certainly explode violently even when uncontained, so the deflagration/detonation dispute is essentially academic [1]. Presence of aluminium fluoride increases the ease of ignition of aluminium-perchlorate mixtures, owing to complex fluoride formation [2],... 

G. S. Serullas21 prepared a crystalline mass of aluminium perchlorate by evaporating a soln. of aluminium hydroxide in perchloric acid. The crystals are... 

Aluminium perchlorate and hydroxoperchlorate are both extractable from aqueous solutions by tributyl phosphate—the latter as highly polymerized species.412... 

Model experiments showed that initiation is quantitative only in some systems. Thus, benzyl bromide reacts with AgSbF6 with 100% 140) yield, while AgPF6 gives only 75 % yield 136). Mercury-, lead-, ferric halides and aluminium perchlorate were also used and generally gave lower initiation efficiencies and produced some homopolymer. This may be due to direct initiation by the added salts, in agreement with the recent data of Gandini et al., who observed initiation of vinyl and heterocyclic cationic polymerization by aluminium triflate 141). 

A proton resonance spectroscopic study of methanolic solutions of magnesium, zinc and aluminium perchlorates well reflected the effects of the cations on the solvent [Bu 69]. In the case of salts with different anions, however, the different hydrogen-bonding abilities of the anions could also be detected in the proton resonance spectrum. This is clearly seen, for example, from the data from PMR measurements on dimethylformamide solutions of halides [Mo 68]. 

Aluminium.— Plots of pH against time have been determined for basic solutions of aluminium perchlorate. It seems possible to follow five stages of polymerization in such solutions. A spectrophotometric study of the reaction of hexa-... 

---