Thiophene-NPN Ligand Supported Rare-Earth Metal Bis(alkyl) Complexes. Synthesis and Catalysis toward Highly <i>trans</i>-1,4 Selective Polymerization of Butadiene
作者:Dun Wang、Shihui Li、Xinli Liu、Wei Gao、Dongmei Cui
DOI:10.1021/om800660j
日期:2008.12.22
rare-earth metal tris(alkyl)s with the corresponding HL1−4 ligands via alkane elimination. Complexes 1a, 1b, 2a−2c, and 4a are monomeric with a coordinating THF molecule. Each metal ion is coordinated by a NPN ligand, two trans-located alkyl groups, and a THF molecule, forming a distorted trigonal-bipyramidal geometry. Complex 3a is THF-free, adopting a distorted tetrahedron geometry. In combination with
一系列新的稀土金属双(烷基)络合物[L 1-3 Ln(CH 2 SiMe 3)2(THF)n ](L 1 = MeC 4 H 2 SCH 2 NC 6 H 4(Ph)2 P = NC 6 H ^ 2我3 -2,4,6-:LN =钪,ñ = 1(1A); LN =路,ñ = 1(图1b),L 2 =的MeC 4 ħ 2 SCH 2 NC 6 H ^ 4( Ph)2 P═NC 6 ħ 3的Et 2 -2,6:LN =钪,Ñ = 1(图2a); Ln = Lu,n = 1(2b); Ln = Y,n = 1(2c); 大号3 =的MeC 4 ħ 2 SCH 2 NC 6 H ^ 4(PH)2 P═NC 6 ħ 3我镨2 -2,6:LN =钪,Ñ = 0(图3a))和L 4钪(CH 2森达3)2(四氢呋喃)(图4a)(L 4 = C 6 H ^ 5 CH 2 NC 6 H ^ 4(PH)2 P═NC