Die Kristallstruktur von (YbCl_2(THF))_5)~+(WOCl_4(THF))~-

摘要

Blue moisture sensitive single crystals of [YbCl_2(THF)_5]~+[WOCl_4(THF)]~- were obtained as a by-product from the reaction of the ytterbium trisamide Yb[N(SiMe_3)_2]_3 with tungsten hexachloride in THF solution. The crystals were suitable for an X-ray crystal structure determination. Space group P2/c, Z = 2, lattice dimensions at -80 deg C: a = 1192.5 (1), b = 1117.1 (1), c = 1349.9 (1) pm, #beta# = 104.115 (7), R = 0.0424. The structure consists of cations [YbCl_2(THF)_5]~+ in which the ytterbium atom is coordinated in a pentagonalbipyramidal way by the chlorine atoms in the axial positions and by the oxygen atoms of the THF molecules in equatorial positions. Counter-ions are the well-known [WOCl_4(THF)]~- ions.