2020 年 36 巻 p. 17-19
The crystal structure of manganese(II) hexafluorosilicate hexahydrate, [Mn(H2O)6]SiF6, was determined by the single-crystal X-ray diffraction method at 90 K. The complex crystallizes in the monoclinic space group P21/c with a = 6.473(3), b = 9.639(5), c = 8.579(4)Å, β = 100.009(7)°, V = 527.2(4)Å3, Dcalcd = 1.922 g/cm3, Z = 2. The R1 [I > 2σ(I)] and wR2 (all data) values are 0.0330 and 0.0734, respectively, for all 1278 independent reflections. The manganese(II) ion is located at the crystallographic inversion center with six water molecules, each of which is disordered into two positions, forming a distorted octahedral geometry. The hexafluorosilicate ion is also located at the crystallographic inversion center with six disordered fluoride atoms. The temperature dependence of the magnetic susceptibility obeys the Curie–Weiss law with C = 4.476(2)cm3 mol−1, θ = –0.39(6)K, showing almost no magnetic interaction between the metal centers.
