V-NMR-spektroskopische Untersuchungen Amido-tert-butylimidovanadium(V) Compounds.

Amido-tert-butylimido-vanadium(V)-Verbindungen.

Darstellung, Reaktionen und

V-NMR-spektroskopische Untersuchungen Amido-tert-butylimidovanadium(V) Compounds.

Synthesis, Reactions and

V NMR Spectroscopic Studies

Fritz Preuss, Monika Vogel, Uwe Fischbeck, Jens Perner, Gerhard Overhoff, Edith Fuchslocher, Frank Tabellion, Barbara Geiger und Gotthelf Wolmersh¨auser

Erwin-Schr¨odinger-Straße, D-67663 Kaiserslautern

Sonderdruckanforderungen an Prof. Dr. F. Preuss. E-mail: fpreuss@rhrk.uni-kl.de Z. Naturforsch.56 b,1100–1108 (2001); eingegangen am 27. Juni 2001

Amido-tert-butylimido-vanadium(V) Compounds,⁵¹V NMR Spectra

The reactions of^tBuN = VCl₂DME with LiX (X = NH^tBu, NR₂, OSiPh₃, SR, Alkyl, Cp) have been studied. LiNH^tBu and LiCH₃furnish the binuclear diamagnetic tert-butylimido-vana- dium(IV) compounds [(-N^tBu)₂V₂X₄]; in all other cases only the vanadium(V) compounds

tBuN=VX₃and^tBuN=VCpCl₂formed by disproportionation reactions of vanadium(IV) can be isolated. The syntheses of various mononuclear amido tert-butylimido-vanadium(V) complexes as well as of the binuclear complexes [(-N^tBu)₂V₂(N^tBu)₂Cl₂] and [(-O)V₂(N^tBu)₂Cp₂Cl₂] are also described. All compounds obtained have been characterized by⁵¹V NMR spectroscopy.

tBuN=V(OMe)₃was investigated by X-ray diffraction analysis; the molecular structure has been found to be that of a binuclear vanadium(V) complex with two bridging methoxo ligands.