T. Rubenstahl et al., [VCL3(NPPH3)(OPPH3)], A PHOSPHORANE IMINATO COMPLEX OF VANADIUM(IV), Zeitschrift fur anorganische und allgemeine Chemie, 619(6), 1993, pp. 1023-1026
Citations number
25
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Zeitschrift fur anorganische und allgemeine Chemie
The title compound has been prepared from vanadium tetrachloride and M
e3SiNPPh3 in the presence of OPPh3 in CCl4 solution, forming orange-re
d, moisture sensitive crystals, which were characterized by an X-ray s
tructure determination. Space group Cc, Z = 4, 2 560 observed unique r
eflections, R = 0.049. Lattice dimensions at 0-degrees-C: a = 1018(1),
b = 1826(2), c = 1859(2) pm, beta = 93.65(9)-degrees [VCl3(NPPh3)(OPP
h3)] forms monomeric molecules, in which the vanadium atom is coordina
ted in a distorted square pyramidal fashion with the (NPPh3)- ligand i
n apical position. The three chlorine atoms and the oxygen atom of the
OPPh3 molecule occupy the basal positions. The phosphorane iminato gr
oup V=N=PPh3 is nearly linear (bond angle VNP 161.4-degrees), the bond
lengths VN (169 pm) and PN (162 pm) correspond with double bonds.