Dioximate- and Bis(salicylaldiminate)-Bridged Titanium and Zirconium Alkoxides: Structure Elucidation by Mass Spectrometry
作者:Christian Maurer、Ernst Pittenauer、Michael Puchberger、Günter Allmaier、Ulrich Schubert
DOI:10.1002/cplu.201300014
日期:2013.4
with dioximes bearing cyclic linkers, such as cyclohexyl or aryl groups, resulted in insoluble polymeric compounds. The treatment of various bis(salicylaldiminates) with titanium and zirconium alkoxides resulted in compounds with the same composition [TiL(OR)2}2], in which, however, two monomeric Ti(OR)2 units are bridged by the ligands L. The two structural possibilities can be distinguished by low‐energy
用 1,5-戊二肟或 2,5-己二肟处理钛醇盐导致形成复合物 [Ti L (OR) 2 } 2 ],其中二肟配体 ( L ) 桥接二聚体 Ti 2 (μ 2 -或) 2 个单位。通过单晶结构分析、ESI质谱以及一维和二维溶液核磁共振光谱确定了配合物的结构。相比之下,用带有环状连接基团(例如环己基或芳基)的二肟处理钛醇盐会产生不溶性聚合物。用钛和锆的醇盐处理各种双(水杨醛酸二甲酯)产生具有相同组成的化合物 [TiL (OR) 2 } 2 ],然而,其中两个单体Ti(OR) 2单元由配体L桥接。由于它们不同的碎裂模式,这两种结构可能性可以通过低能量碰撞诱导解离来区分。