Synthese und konformationsstudien von selen-analoga der metallocen-dithiolen-chelate früher übergangsmetalle |
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Authors: | H. K pf Th. Klap tke |
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Affiliation: | Institut für Anorganische und Analytische Chemie der Technischen Universität Berlin, Strasse des 17. Juni 135, D-1000 Berlin 12 B.R.D. |
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Abstract: | The reaction of the metallocene dichlorides Cp2MCl2 (Cp = η5-C5H5; M = Ti, Zr, Hf, Mo, W) and Cp2′TiCl2 (Cp′ = η5-C5H4CH3) with equimolar amounts of dilithium-benzene-o-diselenolate, 1,2-(LiSe)2C6H4, gives the chelate complexes Cp2M(Se2C6H4) (M = Ti (I), Zr (II), Hf (III), Mo (IV), W (V)) and Cp2′Ti(Se2C6H4) (VI). CpTiCl3 reacts with 1,2-(LiSe)2C6H4 to give CpTiCl(Se2C6H4) (VII). The ring inversion activation parameters for I–VI can be determined by means of temperature-dependent 1H NMR spectroscopy in solution. The fragmentation behaviour of I–VII in the mass spectrometer has been investigated by pursuing metastable transitions, using linked-scan techniques. |
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