Substitution Effects in Highly Syndioselective Styrene Polymerization Catalysts Based on Single-Component Allyl <i>ansa</i>-Lanthanidocenes: An Experimental and Theoretical Study
作者:Eva Laur、Elisa Louyriac、Vincent Dorcet、Alexandre Welle、Aurélien Vantomme、Olivier Miserque、Jean-Michel Brusson、Laurent Maron、Jean-François Carpentier、Evgueni Kirillov
DOI:10.1021/acs.macromol.7b00853
日期:2017.9.12
diffraction (1-Nd-K(allyl), 2-La, 2-Pr, 2-Nd, 2-Sm, and 4-Nd). Those complexes, especially 1-Nd-K(allyl), 2-Nd, 4-Nd, 2-La, and 2-Sm, act as single-component catalyst precursors for polymerization of styrene (in bulk or in aliphatic hydrocarbon solutions, (nBu)2Mg as scavenger, Tpolym = 60–140 °C), affording highly syndiotactic polystyrene (sPS) ([r]5 = 63–88%; Tm up to 260 °C). High productivities (up to
一系列烯丙基柄-lanthanidocenes,[我2 C(ç 5 ħ 4)(流感)}的Nd(1,3-C 3 H ^ 3(森达3)2)2 ] K(流感= 9-芴基; 1 -Nd-K(烯丙基))和R 2 C(C 5 H 4)(R'R'Flu)} Ln(1,3-C 3 H 3(SiMe 3)2)(THF)x(R = Me,R'= 2,7- t Bu 2,Ln = Y(2-Y),Sc(2-Sc),x = 0; Ln = La(2-La),Pr(2-Pr),Nd(2-Nd),Sm(2-Sm),x = 1; R = Me,R'= oct =八甲基八氢二苯并,Ln = Nd,x = 1(3-Nd);R = Ph,R'= H,Ln = Nd,x = 1(4-Nd);R = Me,R'= 3,6- t Bu 2,Ln = Nd,x = 1(5-Nd)),以高收率制备,并通过NMR光谱进行了表征(对于反