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The aminovanadium(V) compounds VO(OR) 2 [NR'(SiMe 3 )] and VO(OR)[NR'(SiMe 3 )] 2  have been prepared by reaction of LiNR'(SiMe 3 ) with VO(OR) 2 Cl and VO(OR)Cl 2 , respectively; their spectroscopical data ( 1 H NMR, IR, MS) are reported. All compounds are monomeric in solution. In some cases 1.3 migration of SiMe 3  groups from nitrogen to oxygen is observed on heating. Kinetic measurements indicate the rearrangement reaction to be irreversible and intramolecular. The reaction of VO(OR)Cl 2  with HNR'(SiMe 3 ) leads to iminovanadium(V) compounds such as R'N = V(OSiMe 3 ) 3 , R'N = V(OSiMe 3 ) 2 (OR) and R'N = V(OR) 2 Cl.

zeitschrift für naturforschung b

Reaktion der Alkoxo-oxovanadium(V)-chloride mit Lithium-alkyl-trimethylsilylamid / Reaction of Alkoxo Oxovanadium(V) Chlorides with Lithium Alkyl Trimethylsilylamide