Organisch-Chemisches Institut der Universität Münster , Correnstrasse 40, 48149 Münster, Germany .
J Am Chem Soc. 2014 Feb 26;136(8):3293-303. doi: 10.1021/ja413060u. Epub 2014 Feb 12.
The tetramethylene-bridged PMes2/B(C6F5)2 frustrated Lewis pair (FLP) 8 was prepared by hydroboration of Mes2P-(CH2)2CH═CH2 with HB(C6F5)2. It is an active FLP that splits dihydrogen under mild conditions and, consequently, serves as a metal-free hydrogenation catalyst for a variety of substrates. It also reacts typically with terminal acetylenes. The C4-bridged FLP 23 was prepared by HB(C6F5)2 hydroboration of 1-dimesitylphosphino-2-vinylferrocene. It represents a rare example of a FLP where the equilibrium between the open form and the closed internal P/B adduct form is experimentally observable. It also shows a variety of typical FLP reactions, including dihydrogen splitting. The FLPs 8 and 23 (open form) and many precursors and products were characterized by X-ray diffraction.
四亚甲基桥联的 PMes2/B(C6F5)2 受阻路易斯对 (FLP) 8 通过 Mes2P-(CH2)2CH=CH2 与 HB(C6F5)2 的硼氢化反应制备。它是一种活性 FLP，可在温和条件下分解氢气，因此可用作多种底物的无金属氢化催化剂。它也通常与末端炔烃反应。C4 桥联的 FLP 23 通过 HB(C6F5)2 对 1-二甲基膦基-2-乙烯基二茂铁的硼氢化反应制备。它代表了一个罕见的 FLP 例子，其中开放形式和闭合的内部 P/B 加合物形式之间的平衡可以通过实验观察到。它还显示了各种典型的 FLP 反应，包括氢气分解。FLPs 8 和 23（开放形式）以及许多前体和产物均通过 X 射线衍射进行了表征。
