水存在下二氯二茂钛与取代水杨酸的反应

Reactions Between Biscyclopentadienyltitanium( IV) Dichloride and Substituted Salicylic Acid in the Presence of Water

发现含有二氯二茂钛与取代水杨酸的氯仿淀粉 在水存在下可以发生反应，由此合成了六个二茂钛衍生物，经元素分析、ＩＲ及＾１Ｈ ＮＭＲ对其结构进行了表征，并对反应机理进行了探讨。

Six derivatives of titanocene have been prepared by reacting Cp2TiCl2 with substituted salicylic acid in the presence of water. The complexes were characterized by elemental analysis, IR and 1H NMR spectroscopy. Spectro-scopic data suggest that, for complexes I ~ IV , the oxygens of the hydroxyl and carboxyls in the ligands are bound to Ti to form six - membered cyclic compounds. However, the 5 - nitrosalicylato ligand in complex V can only be regarded as a monodentate one. Based on the UV - vis spectrum, the mechanism of the formation of these complexes is proposed as follows: first, Cp2TiCl2 reacts with water to form its hydrate, Then the hydrate interacts with substituted salicylic acids in the organic phase to form an intermediate. Finally, the final complex is formed via the intermediates.