Abstract

The kinetic and thermodynamic parameters of the decomposition of isopropylbenzene hydroperoxide in chlorobenzene in the presence of dibenzo-18-crown-6 ether (DB18C6) complexes with CaCl₂, SrCl₂, and BaCl₂ were experimentally obtained. The catalytic activity of the alkaline earth metal compounds decreased in the order SrCl₂⋅DB18C6 > CaCl₂⋅DB18C6 > BaCl₂⋅DB18C6. The formation of intermediates in the metal complex–hydroperoxide system was established kinetically. SrCl₂⋅DB18C6 formed the strongest and most ordered structures with isopropylbenzene hydroperoxide, which decomposed at the highest rates. Quantum-chemical modeling confirmed the formation of intermediates.

中文翻译：

---

碱土金属氯化物冠醚配合物催化氢过氧化异丙苯分解

摘要

实验获得了二苯并-18-冠-6醚(DB18C6)与CaCl ₂、SrCl ₂和BaCl _{2配合物存在下氢过氧化异丙苯在氯苯中分解的动力学和热力学参数。}碱土金属化合物的催化活性按SrCl ₂ ⋅DB18C6 > CaCl ₂ ⋅DB18C6 > BaCl ₂ ⋅DB18C6 的顺序降低。金属络合物-氢过氧化物体系中中间体的形成是通过动力学建立的。_二氯化锶⋅DB18C6 与氢过氧化异丙苯形成最强且最有序的结构，其分解速率最高。量子化学模型证实了中间体的形成。