The catalytic efficiency of the dinuclear complex depends on the cooperative effect of the TiIV ions, the systematic variation of the intermetallic distance, and the ligand’s steric properties of the complex, which enhances the reaction rate. Most interestingly, this is the first example of catalytic insertion of various E–H bonds into the carbodiimides using a single-site catalyst because only the titanium-mediated
一系列单核
钛(IV)与一般组合物的复合物κ 3 - [R NHPh基2 P(X)} 2的Ti(NME 2)2 ] [R = C ^ 6 ħ 4,X =
SE(图3b); R =反式-C 6 ħ 10,X = S(图4a),
硒(4B)]和[κ 2 -N(PPH 2
SE)的2 } 2的Ti(NME 2)2 ](图6b)和两个双核
钛(IV)配合物,[C 6 H 4 (NPh 2
PS)(N)}的Ti(NME 2)] 2(图3c)和κ[ 2 -N PPH(2
SE)中的Ti}(NME 2)2 ] 2(图6C)被报告。双核
钛(IV)配合物6c在温和条件下可作为
化学选择性将E–H键(E = N,O,S,P,C)加成到杂多
烯中的有效
催化剂。将
脂肪族和芳香族胺,醇,
硫醇,
氧化膦和
乙炔催化加成到
碳二
亚胺上,可以在温和的条件下以高收率高产率地得到相应的加
氢产物。双核络合物的催化效率取决于Ti的协同作用