| Abstract: | Yb3OBr4{N(SiMe3)2}3(THF)3], an Amido Complex of Ytterbium with a Clusterlike Structure The title compound has been prepared from YbBr3 and NaN(SiMe3)2 in THF suspension, forming yellow single crystals from hexane solutions which were characterized by a crystal structure determination. Space group P1 , Z = 2, lattice dimensions at ?100°C: a = 1085.4(1), b = 1410.2(1), c = 1912.0(1) pm; α = 78.62(1)°, β = 80.61(1)°, γ = 73.45(1)°, R = 0.025. In the molecular structure of Yb3OBr4{N(SiMe3)2}3(THF)3] the three ytterbium atoms together with the μ3-oxygen atom and a μ3-bromine atom form a distorted trigonal bipyramid. In addition, three μ2-Br atoms coordinate the Yb atoms in the equatorial plane, whereas the THF molecules and the N(SiMe3)2? ligands are terminally coordinated, thus forming a distorted octahedrally surrounding of the Yb atoms. |
