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The reactions of  t BuN = VCl 2  · DME with LiX (X = NH t Bu, NR 2 , OSiPh 3 , SR, Alkyl, Cp) have been studied. LiNH t Bu and LiCH 3  furnish the binuclear diamagnetic tert-butylimido-vanadium( IV) compounds [(μ-N t Bu) 2 V 2 X 4 ]; in all other cases only the vanadium(V) compounds  t BuN=VX 3  and  t BuN=VCpCl 2  formed 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 [μ-N t Bu) 2 V 2 (N t Bu) 2 Cl 2 ] and [(μ-0)V 2 (N t Bu) 2 Cp 2 Cl 2 ] are also described. All compounds obtained have been characterized by  51 V NMR spectroscopy.  t BuN=V(OMe) 3  was 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.

zeitschrift für naturforschung b

Amido-tert-butylimido-vanadium(V)-Verbindungen. Darstellung, Reaktionen und  51 V-NMR-spektroskopische Untersuchungen / Amido-tert-butylimidovanadium(V) Compounds. Synthesis, Reactions and  51 V NMR Spectroscopic Studies