in some cases, larger temperatures are utilized instead of a catalyst (on the similar reaction ailment). underneath these situations, toluene undergoes dealkylation to benzene and methane:
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for a gasoline (petrol) additive, benzene improves the octane score and lowers knocking. As a consequence, gasoline frequently contained various % benzene ahead of the nineteen fifties, when tetraethyl lead changed it as the most generally made use of antiknock additive. With the worldwide phaseout of leaded gasoline, benzene has built a comeback like a gasoline additive in a few nations.
applying electrophilic aromatic substitution, lots of practical groups are launched on to the benzene framework. Sulfonation of benzene will involve using oleum, a mix of sulfuric acid with sulfur trioxide. Sulfonated benzene derivatives are valuable detergents.
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