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Diethylbenzene and diethylbenzene are two common organic compounds that have significant differences in chemical structure, physical properties, and application fields. From a chemical structure perspective, the molecular formula of divinylbenzene is C10H12, and the structural formula is PhCH=CHPh. It is a cyclic olefin compound containing a benzene ring and a vinyl group. The molecular formula of diethylbenzene is C14H22, and the structural formula is CH32C6H4, which is an isomer of xylene. From a molecular structure perspective, divinylbenzene contains double bonds, while diethylbenzene contains benzene rings and methyl groups. In terms of physical properties, divinylbenzene has a high melting and boiling point, as well as good solubility and thermal stability, making it suitable for polymerization reactions and high-temperature processing; However, diethylbenzene has a lower melting and boiling point, and its solubility and stability are relatively poor. It is often used in the preparation of solvents and coatings. In the application field, divinylbenzene is commonly used in the production of polystyrene resin, olefin polymerization catalyst, and UV cured resin, etc; Diethylbenzene is mainly used in organic synthesis, surfactants, and rubber production. By comparing the chemical structure, physical properties, and application fields of divinylbenzene and diethylbenzene, we can better understand the differences between the two and provide reference for their rational application.