Dinuclear Praseodymium(III) Complex with N,N '-Bis(2-hydroxy-3,5-dimethylbenzyl)- N, N '-dimethyl-1,2-ethanediamine

A dinuclear praseodymium(III) complex with N,N'-bis(2-hydroxy-3,5-dimethylbenzyl)-N,N'-dimethyl-1,2-ethanediamine (H(2)hdde), [Pr-2(hdde)(2)(CH3COO)(2)(CH3OH)(2)].2CH(2)Cl(2), 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 P2(1)/c with a = 10.3559(8)angstrom, b = 18.6019(14)angstrom, c = 15.7093(12)angstrom, beta = 104.6470(10)degrees, V = 2927.9(4)angstrom(3), D-x = 1.523 g/cm(3), and Z = 2. The R1 [I > 2 sigma(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 phenolatooxygen atoms and two amino-nitrogen atoms of hdde(2-), 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)angstrom. Solid-state infrared and electronic spectra and the temperature dependence of magnetic susceptibilities (Delta = 1.14 cm(-1), zJ' = -0.30 cm(-1), and g = 0.75) are in harmony with the dinuclear Pr(III) structure.