Me3Si-substituted indenes of type 1-SiMe3-3,4-(CH2)3C9H5 (9), 1-SiMe3-4-R-7-R′C9H5 (11a, R = R′ = Me; 11b, R = R′ = Ph; 11c, R = Me, R′′ = Ph) and 1,1′ -(SiMe3)2-4,7-Me2C9H4 (12) were synthesised as precursors for piano-stool type halfsandwich indenyl-titanium trichloride complexes.Treatment of 9, 11, and 12 with equimolar amounts of TiCl4 gives the complexes (η5-3,4-(CH2)3C9H5)TiCl3 (13), (η5-4-R-7-R′C9H5)TiCl3 (14a, R =R′ = Me; 14b, R =R′= Ph; 14c, R = Me, R′ = Ph), and (η5-1-SiMe3-4,7-Me2C9H4)TiCl3 (15), respectively, with liberation of Me3SiCl.Detailed UV/vis spectroscopic and cyclic voltammetric studies were carried out which allow a comparison of substituent effects in 13 - 15.
使用Me3Si取代的1-SiMe3-3,4-(CH2)3C9H5(9)、1-SiMe3-4-R-7-R'C9H5(11a,R = R' = Me; 11b,R = R' = Ph; 11c,R = Me,R'' = Ph)和1,1'-(SiMe3)2-4,7-Me2C9H4(12)被合成为钢琴凳型半夹心茚基钛三氯化物配合物的前体。将9、11和12与等摩尔量的TiCl4处理,得到配合物(η5-3,4-(CH2)3C9H5)TiCl3(13)、(η5-4-R-7-R'C9H5)TiCl3(14a,R = R' = Me; 14b,R = R' = Ph; 14c,R = Me,R' = Ph)和(η5-1-SiMe3-4,7-Me2C9H4)TiCl3(15),同时释放出Me3SiCl。进行了详细的紫外/可见光谱和循环伏安研究,可以比较13-15中取代基效应。