Die Kristallstruktur von Sc(CH3COO)3, ein Metall(III)acetat mit Kettenstruktur / Crystal Structure of Sc(CH3COO)3, a Metal(III) Acetate with a Chain Structure
2014
Fuchs, Robert | Strähle, Joachim
Sc(acO)₃ was obtained from Sc₂O₃ and (CH₃CO)₂O or from Sc₂(CO₃)₃ and acetic acid. Recrystallization in water yields hexagonal columns of anhydrous Sc(acO)₃. It crystallizes in the space group P 6₃/mcm with the lattice constants a = 791.1(3) pm, c = 886.6(7) pm and z = 2. Sc(acO)₃ exhibits a polymeric structure with a linear chain of metal atoms which are connected in each case by three bridging acetato groups. For the Sc atoms results a sixfold coordination in the form of a compressed octahedron with the symmetry D₃d and with distances Sc-O = 208.4 pm. The columns of polymeric Sc(acO)₃ are arranged like in an ideal hexagonal close packing of cylindrical rods.
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