Tris(benzhydryl) and Cationic Bis(benzhydryl) Ln(III) Complexes: Exceptional Thermostability and Catalytic Activity in Olefin Hydroarylation and Hydrobenzylation with Substituted Pyridines
作者:Alexander N. Selikhov、Egor N. Boronin、Anton V. Cherkasov、Georgy K. Fukin、Andrey S. Shavyrin、Alexander A. Trifonov
DOI:10.1002/adsc.202000782
日期:2020.12.8
toluene‐d8 at 140 °C during 72 h. The reactions of 1 and 2 with B(C6F5)3 allowed for the synthesis of base‐free cationic complexes [(p‐tBu‐C6H4)2CH]2Ln[(p‐tBu‐C6H4)2CHB(C6F5)3] (Ln=La (4), Nd (5)) which adopt the structure of a contact ion pair. Combinations of 1–3 and borane ((B(C6F5)3, [Me2NHPh][B(C6F5)4], [Ph3C][B(C6F5)4]) as well as 4 and 5 were found to be highly efficient, regio‐ and chemoselective
一系列LN(III)的三(二苯甲基)配合物[(p -吨卜-C 6 H ^ 4)2 CH] 3 LN(Ln为La(上1),钕(2),Y(3))是由合成LnHal的盐复分解反应3(THF)3.5(Ln为镧,钕,哈尔=氯; Ln为Y,哈尔= I)和[(p -吨卜-C 6 H ^ 4)2 CH]的Na。在1-3的二苯甲基的配体与金属中心连接的η 4 -coordination模式。对于抗磁性配合物1和3在溶液中检测到fluxional行为。配合物1 - 3被证明是热稳定的:即使在甲苯-d加热它们的溶液后,没有观察到分解8 72小时期间在140℃下。的反应1和2与B(C 6 ˚F 5)3允许游离碱阳离子络合物的合成[(p -吨卜-C 6 H ^ 4)2 CH] 2 LN [(p -吨卜-C 6高4)2CHB(C 6 F 5)3 ](Ln = La(4),Nd(5))采用接触离子对的结构。组合1 - 3和硼烷((B(C