Zirconium bis-indenyl compounds. Synthesis and X-ray crystallography study of 1- and 2-substituted bis(R-indenyl)zirconium dichloride metallocenes
作者:Neil E. Grimmer、Neil J. Coville、Charles B. de Koning、Jeremy M. Smith、Leanne M. Cook
DOI:10.1016/s0022-328x(00)00570-2
日期:2000.12
series of 1- and 2-substituted indenyl ligands were prepared and used in the synthesis of [1-R-Ind]2ZrCl2 [R=Me (2b), Et (4b), iPr (5b), tBu (6b), SiMe3 (8b), Ph (10b), Bz (12b), 1-Naph (14b)] and [2-R-Ind]2ZrCl2 [R=Me (1b), Et (3b), SiMe3 (7b), Ph (9b), Bz (11b), 1-Naph (13b)] metallocenes. An X-ray crystallographic study of 4b and 10b showed the complexes to be the racemic diastereomers (4b, both
制备了一系列的1和2取代的茚基配体,并用于合成[1-R-Ind] 2 ZrCl 2 [R = Me(2b),Et(4b),i Pr(5b),t Bu (6b),SiMe 3(8b),Ph(10b),Bz(12b),1-Naph(14b)]和[2-R-Ind] 2 ZrCl 2 [R = Me(1b),Et(3b) ,SiMe 3(7b),Ph(9b),Bz(11b),1-Naph(13b))]金属茂。X射线晶体学研究4b和10b显示该配合物为外消旋非对映异构体(4b为R,R和S,S-对映体,而10b为S,S-对映体)。X射线数据和NMR光谱数据表明,取代基的大小影响金属茂的两个茚基配体的取向。在图4b非对映体都被发现结晶与其乙基顺式相对于(双-中央)到彼此而较大的苯基基团中10b导致茚基配体的反(双侧)取向。