Abstract
Abstract The cyclopentadienyl compounds tC4R9N = VCpCl2 (2). tC4H9N = VCp(OtC4H9)Cl, tC4H9N = VCp(OtC4H9)(R) (R = CH3, "C4H9, CH2SiMe3), tC4H9N = VCp2(OtC4H9) (5) and ,tC4H9N = VCp(OtC4H9)2 have been prepared starting from tC4H9N = VCl3 1H and 51V NMR spectra are discussed; except for 5, the C5H5 rings are η5-coordinated to the metal atom. The temperature dependence of the 1H NMR spectrum of 5 indicates two types o f intramolecular rearrangements: η1/η5-Interchange of the C5H5 rings and fluxional behavior of the η1-C5H5 ring. The molecular structure of 2 has been investigated by X-ray diffraction analysis.
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