| Abstrakt: |
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 TiCl4gives 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. |
