Synthesis, structural characterization and reactivity of new tin bridged ansa-bis(cyclopentadiene) compounds: X-ray crystal structures of Me2Sn(C5Me4R-1)(2) (R = H, SiMe3)

摘要

The organo-tin compounds, Me2Sn(C5H4R-1)(2) (R = Me (1), Pr' (2), Bu' (3), SiMe3 (4)) and Me2Sn(C5Me4R-1)(2) (R = H (5), SiMe3 (6)), were prepared by the reaction of Me2SnCl2 with the lithium or sodium derivative of the corresponding cyclopentadiene. Compounds 1-6 have been characterized by multinuclear NMR spectroscopy (H-1, C-13, Sn-119). In addition the molecular structures of 5 and 6 were determined by single crystal X-ray diffraction studies. The transmetalation reaction of 1-6 with ZrCl4 or [NbCl4(THF)(2)] gave the corresponding metallocene complexes in high yields. (C) 2007 Elsevier B.V. All rights reserved.