Abstract
X-ray structure analysis of Sm(C28H40NO2)3 is performed. The crystals are monoclinic, a = 13.490(2) A, b = 27.955(5) A, c = 23.000(6) A, β = 105.30(2)°, Z = 4, space group P21/c, and R = 0.0332 for 9670 reflections. The coordination number of the Sm atom is nine (tricapped trigonal prism with the O atoms in the base and the N atoms at the caps). The approximate symmetry of the complex is D3. The mean C-O and C-N bond lengths (1.266 and 1.342 A, respectively) correspond to the monoanion redox form of the ligands. In distinction to the earlier studied complexes ML2 with the same ligands, the six-membered rings in the ligands of this complex are essentially noncoplanar: the dihedral angles between them are 42.8°, 34.0°, and 41.1°.
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