Abstract
The reaction of [tBuN=VCp(PMe3)2] (1) with S8, Se, Te or I2 have been studied. Via this pathway dinuclear diamagnetic tert-butylimidovanadium(IV) complexes are formed: [(μ-E)(μ- NtBu)2V2Cp2] (E=S, Se, Te), [(μ-η1−E2)(μ-NtBu)2V2Cp2] {E=Se (3), Te}, [(μ-NtBu)2V2Cp2I2]. In addition the vanadium(V) complexes [tBuN=VCp (S5)] (9a) and tBuN=VCpI2 could be isolated. The synthesis of tBuN=VCpF2 is also described. All compounds obtained have been characterized by spectroscopic methods (MS; 1H, 13C, 51V NMR), 3 and 9b by single crystal X-ray diffraction analysis.
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