Chemical implantation of Group 4 cations on silica via cyclopentadienyl- and N,N-dialkylcarbamato derivatives
作者:Lucia Calucci、Claudia Forte、Guido Pampaloni、Calogero Pinzino、Filippo Renili
DOI:10.1016/j.ica.2009.10.004
日期:2010.1
implantation of Group 4 cations [Ti(III), Ti(IV), Zr(IV), Hf(IV)] has been carried out under mild conditions by the reaction of polycyclopentadienyl- (MCp n ; M = Ti, n = 3, 4; M = Zr, Hf, n = 4), mixed cyclopentadienyl/ N , N -dialkylcarbamato (ML x (O 2 CNEt 2 ) y ; M = Ti, L = Cp, C 5 Me 5 (Cp*), x = 2, y = 1; M = Hf, L = Cp, x = 1, y = 3), and N , N -dialkylcarbamato (M(O 2 CNR 2 ) n , M = Ti, n = 3, R =
摘要在温和条件下,通过聚环戊二烯基-(MCp n; M = Ti,n = 3,4; M = Zr,Hf,n = 4),混合的环戊二烯基/ N,N-二烷基氨基甲酸酯(ML x(O 2 CNEt 2)y; M = Ti,L = Cp,C 5 Me 5(Cp * ),x = 2,y = 1; M = Hf,L = Cp,x = 1,y = 3),N,N-二烷基氨基甲酸酯(M(O 2 CNR 2)n,M = Ti,n = 3 ,R = iPr; M = Ti,Hf,n = 4,R = Et; M = Zr,n = 4,R = iPr)衍生物,具有无定形二氧化硅的硅烷醇基。在该过程中释放出环戊二烯/五甲基环戊二烯和/或二氧化碳和仲胺。注入的阳离子的量取决于金属和配体,五甲基环戊二烯基络合物的反应性低于未取代的同类物。