256385-95-2Relevant academic research and scientific papers
Synthesis, reactions and 51V NMR spectroscopic studies of imidovanadium(V) trichlorides: RN=VCl3 (r = H, SiMe3, Alkyl)
Preuss, Fritz,Fischbeck, Uwe,Tabellion, Frank,Perner, Jens,Frank, Walter,Reiss, Guido
, p. 255 - 262 (2001)
The reactions of Me3SiN=VCl3 (1) with MeOH, PhOH, HCl, PyH+Cl- or LiOtBu have been studied. The reductive decomposition of 1 by hydrogen chloride in toluene yields HN=VCl3 as a labile intermediate which could be isolated only in a small amount. The syntheses of RN=VCl3 (R = neopent, nPr, cyclohex, CPh3, 1-Ad) and [(tBuN)2V2Cl4(μ-OC 13H9)2] (15) are also described. All compounds obtained are characterized by 51V NMR spectroscopy, the fluorenolato complex 15 by X-ray diffraction analysis.
Highly efficient dimerization of ethylene by (Imido)vanadium complexes containing (2-anilidomethyl)pyridine ligands: Notable ligand effect toward activity and selectivity
Zhang, Shu,Nomura, Kotohiro
, p. 4960 - 4965 (2010/06/15)
(Imido)vanadium(V) complexes containing the (2-anilidomethyl)pyridine ligand, V(NR)Cl2[2-ArNCH2(C5H4N)] (R = 1-adamantyl (Ad), cyclohexyl (Cy), phenyl), exhibit remarkably high catalytic activities (e.g. TOF = 2-730-000 h-1 (758 s-1) by V(NAd)Cl2[2-(2,6-Me2C6H3)NCH 2(C5H4N)) for ethylene dimerization in the presence of MAO, affording 1-butene exclusively (selectivity 90.4 to >99%). The steric bulk of the imido ligand plays an important role in the selectivity (polymerization vs dimerization), and the electronic nature directly affects the catalytic activity (activity: R = Ad > Cy > Ph).
