[Na(15-Krone-5)][ReFCl3(NO)(CH3CN)] Synthese,IR-Spektrum und Kristallstruktur

Na(15-crown-5)]ReFCl₃(NO)(CH₃CN)] Synthesis, IR Spectrum, and Crystal Structure The title compound has been prepared by the reaction of ReCl₃(NO)₂(CH₃CN)] with the equivalent amount of sodium fluoride in the presence of 15-crown-5 in boiling acetonitrile, forming blue crystals. They were characterized by IR spectroscopy and by an X-ray structure determination. Space group P2₁/n, Z = 4,2117 observed independent reflections, R = 0.037, wR = 0.029. Lattice dimensions at 20°C: a = 834.0(2), b = 1600.0(3), c = 1670.0(3) pm; β = 104.19(3)°. The compound forms an ion pair via one Na? F contact of 234.4 pm and one Na? Cl contact of 293.4 pm; the nitrosyl ligand ist in trans-position to the F atom of the anion ReFCl₃(NO)(CH₃CN)]^?.