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- W2952173885 abstract "Abstract The metathetical reaction of [SiMe 2 (C 5 H 4 ) 2 ]MCl 2 (M = Ti, Zr) and [MgCH 2 SiMe 2 CH 2 ] x provides a convenient route for the preparation of the corresponding group 4 ansa-metallocenes, [ SiM e 2 ( C 5 H 4 ) 2 ] M ( C H 2 SiM e 2 C ︹ H 2 ) (M = Ti, Zr). These 1-sila-3-metallacyclobutanes have been characterized by elemental analysis, 1 H and 13 C NMR measurements, and X-ray diffraction methods. From a comparison with the corresponding structural parameters of the unbridged species, [ SiM e 2 ( C 5 H 4 ) 2 ] M ( C H 2 SiM e 2 C ︹ H 2 ) the introduction of the SiMe 2 bridge results in a 7–10° increase in the dihedral angle between the cyclopentadienyl rings and does not significantly modify the structural paramters within the essentially planar 1-sila-3-metallacyclobutane ring." @default.
- W2952173885 created "2019-06-27" @default.
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- W2952173885 date "1989-08-29" @default.
- W2952173885 modified "2023-09-26" @default.
- W2952173885 title "ChemInform Abstract: Synthesis and Structural Characterization of Group 4 ansa-Metallocene Complexes Containing a 1-Sila-3-metallacyclobutane Ring." @default.
- W2952173885 cites W2003851352 @default.
- W2952173885 doi "https://doi.org/10.1002/chin.198935287" @default.
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