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The compounds Li[ n C 4 H 9 VO(O t C 4 H 9 ) 3 ], Me 3 SiCH 2 V(O t C 4 H 9 ) 3 , (CH 3 ) 2 V(OSiMe 3 ) 2  and V(O t C 4 H 9 ) 4  have been prepared by reaction of esters VO(OR) 3 (R =  t C 4 H 9 , SiMe 3 ) with lithium alkyls. RVO(O t C 4 H 9 ) 2  species are not formed by direct alkylation of VO(O t C 4 H 9 ) 3  with LiR; albeit in small yields, these compounds (R = CH 3 , CH 2 SiMe 3 ) can be synthesized however from VO(O t C 4 H 9 ) 2 Cl. The  51 V,  1 H and  13 C NMR spectra of the vanadium(V) and vanadium(IV) compounds are discussed; the constants of  51 V,  1 H and  51 V,  13 C coupling have been determined.

Alkylvanadium(V)-Verbindungen Darstellung und NMR-spektroskopische Untersuchungen/Alkylvanadium(V) Compounds Synthesis and NMR Spectroscopic Studies