Titanium(IV) Cations with Trigonal Monopyramidal Geometry: Unusual Lewis Acids Supported by a Triaryl Triamidoamine Ligand
作者:Priyabrata Ghana、Franziska D. van Krüchten、Thomas P. Spaniol、Jun Okuda
DOI:10.1002/chem.201901796
日期:2019.8.9
Protonolysis of the titanium alkyl complex [Ti(CH2SiMe3)(Xy‐N3N)] (Xy‐N3N=[(3,5‐Me2C6H3)NCH2CH2}3N]3−) supported by a triamidoamine ligand, with [NEt3H][B(3,5‐Cl2C6H3)4] or [PhNMe2H][B(C6F5)4] afforded the cations [Ti(Xy‐N3N)][A] (A−=[B(3,5‐Cl2C6H3)4]− (1[B(ArCl)4]; B(ArCl)4=tetrakis(3,5‐dichlorophenyl)borate); A−=[B(C6F5)4]− (1[B(ArF)4]; B(ArF)4=tetrakis[3,5‐bis(trifluoromethyl)phenyl]borate). These
钛烷基络合物[Ti(CH 2 SiMe 3)(Xy‐N 3 N)]的质子分解(Xy‐N 3 N = [(3,5-Me 2 C 6 H 3)NCH 2 CH 2 } 3 N由三酰胺基胺配体与[NEt 3 H] [B(3,5-Cl 2 C 6 H 3)4 ]或[PhNMe 2 H] [B(C 6 F 5)4 ]负载的] 3-)阳离子[Ti(Xy‐N 3 N)] [A](A − = [B(3,5-Cl 2 C6 H 3)4 ] -(1 [B(Ar Cl)4 ] ; B(Ar Cl)4 =四(3,5-二氯苯基)硼酸酯); 甲- = [B(C 6 ˚F 5)4 ] - (1 [B(AR ˚F)4 ] ; B(氩˚F)4 =四[3,5-双(三氟甲基)苯基]硼酸盐)。这些路易斯酸性阳离子与配位溶剂反应,得到阳离子[Ti(L)(Xy-N 3 N)] [B(C 6 F 5)4](2-L; L = Et 2