Zapf Ludwig, Finze Maik
Institut für nachhaltige Chemie & Katalyse mit Bor (ICB) Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.
Angew Chem Int Ed Engl. 2024 May 21;63(21):e202401681. doi: 10.1002/anie.202401681. Epub 2024 Apr 16.
First examples of diborane(6) dianions decorated with weakly coordination B(CF) (BCF) groups and SiEt moieties have been synthesized demonstrating the synthetic potential of the [B(CN)] dianion. [B{CNB(CF)}] (1) was isolated as potassium and tetrabutylammonium salt. 1 is a rare example for a weakly coordinating dianion and it was used for the stabilization of the carbocation [PhC] and the oxonium acid [H(OEt)]. Reaction of [PhC]1 with HSiEt resulted in the silylated neutral diborane(6) [B{CNB(CF)}(CNSiEt)] (2) in which two BCF groups have been selectively replaced by SiEt substituents, underscoring the stability and chemical versatility of the [B(CN)] dianion. The chemical properties and physicochemical data of 1 and 2 provide insight into electronic, coordinating, and steric properties of theses novel diborane(6) compounds.
首个用弱配位的B(CF)（BCF）基团和SiEt部分修饰的乙硼烷（6）二价阴离子的例子已被合成出来，这证明了[B(CN)]二价阴离子的合成潜力。[B{CNB(CF)}]（1）以钾盐和四丁基铵盐的形式被分离出来。1是弱配位二价阴离子的一个罕见例子，它被用于稳定碳正离子[PhC]和氧鎓酸[H(OEt)]。[PhC]1与HSiEt反应生成了硅烷化的中性乙硼烷（6）[B{CNB(CF)}(CNSiEt)]（2），其中两个BCF基团已被SiEt取代基选择性取代，这突出了[B(CN)]二价阴离子的稳定性和化学多功能性。1和2的化学性质及物理化学数据为这些新型乙硼烷（6）化合物的电子、配位和空间性质提供了深入了解。
