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[VCl 2 (15-crown-5)] + [VOCl 4 ] -  has been prepared by the reaction of VCl 4  with 15-crown-5 in acetonitrile solution in the presence of water, forming black-brown single crystals. They were characterized by IR spectroscopy as well as by an X-ray structure determination. Space group Pnma, Z = 4, 1530 observed unique reflexions, R = 0.052. Lattice dimensions at -120°C: a = 1128.5(4), b = 1063.3(3), c = 1680(1) pm. The compound forms ions, in which the cation contains vanadium(+III), which is seven coordinate by the five oxygen atoms of the crown ether molecule and by two chlorine atoms in axial positions of a pentagonal bipyramide. The [VOCl 4 ] -  anion contains vanadium (+V) with approximately tetragonal symmetry

Synthese und Kristallstruktur von [VCl 2 (15-Krone-5)] + [VOCl 4 ] - / Synthesis and Crystal Structure of [VCl 2 (15-Crown-5)] + [VOCl 4 ] -