73509-63-4Relevant academic research and scientific papers
SYNTHESIS AND NMR-SPECTROSCOPY CHARACTERISTICS OF CARBONYLHYDRIDOVANADIUM COMPLEXES STABILIZED BY OLIGOTERTIARY PHOSPHINES
Puttafarcken Uwe,Rehder, Dieter
, p. 219 - 230 (1980)
Hydridocarbonylvanadium complexes are stabilized by the tri- and tetratertiary phosphines (L) PhP(CH2CH2PPh2)2 (p3), MeC(CH2PPh2)3 (cp3), 2 (p4) and P(CH2CH2PPh2)3 (pp3).The stable complexes HV(CO)3L and the labile intermediates HV(CO)4L have been prepared by chomatography of the anionic parent compounds on silica gel.Irradiation of HV(CO)3pp3 and HV(CO)3p4 affords cis-3> and trans-4>, respectively.The complexes are characterized by their IR, 1H, 31P and 51V NMR spectra.A model of restricted dynamic behaviourbased on the face-capped octahedron is proposed on the basis of the hydride NMR pattern. The dinuclear ligand-bridged 2μ-p4 is obtained by treatment of 2n2n(μ-p4)n> with t-BuCl/H2O.An improved synthesis for the 5-C5H5VH(CO)3>- anion is described; 1H and 51V NMR data indicate that the local symmetry of the moiety is probably C3v.
