2021 年 37 巻 p. 73-75
A dinuclear praseodymium(III) complex with N,N′-bis(2-hydroxy-3,5-dimethylbenzyl)-N,N′-dimethyl-1,2-ethanediamine (H2hdde), [Pr2(hdde)2(CH3COO)2(CH3OH)2]·2CH2Cl2, was synthesized and the crystal structure was determined by the single-crystal X-ray diffraction method at 90 K. It crystallizes in the monoclinic space group P21/c with a = 10.3559(8)Å, b = 18.6019(14)Å, c = 15.7093(12)Å, β = 104.6470(10)°, V = 2927.9(4)Å3, Dx = 1.523 g/cm3, and Z = 2. The R1 [I > 2σ(I)] and wR2 (all data) values are 0.0246 and 0.0611, respectively, for all 6828 independent reflections. The complex is a centrosymmetric dinuclear molecule, where each praseodymium atom is coordinated by two phenolato-oxygen atoms and two amino-nitrogen atoms of hdde2−, two oxygen atoms of acetato ligand and methanol-oxygen atom, and further bridged by a monatomic-oxygen atom of the bidentate acetato ligand with a Pr–Pr distance of 4.1978(3)Å. Solid-state infrared and electronic spectra and the temperature dependence of magnetic susceptibilities (Δ = 1.14 cm−1, zJ′ = –0.30 cm−1, and g = 0.75) are in harmony with the dinuclear Pr(III) structure.
