Crystal Structure of a μ-Phenolato-μ-oxido-bridged Dinuclear Manganese(III) Complex with Dinucleating Schiff-base Ligand Having Three Phenolate Groups

A μ -phenolato- μ -oxido-bridged dinuclear manganese(III) complex with 2-(5-nitro-2-hydroxyphenyl)-1,3-bis(2-(5-nitro-2-hydroxybenzylideneamino)ethyl)imidazolidine (H 3 L NO2 ) was synthesized. The crystal structure was determined by the single-crystal X-ray diffraction method at 90 K. The complex crystallized as [(C 2 H 5 ) 3 NH][Mn 2 ( μ -L NO2 )( μ -O)Cl 2 ]·2THF in the orthorhombic space group Pnma with a = 15.052(3), b = 20.449(4), c = 14.700(3)Å, V = 4524.5(16)Å 3 , D calcd = 1.518 g/cm 3 , Z = 4. The R 1 [ I > 2 σ ( I )] and wR 2 (all data) values are 0.0713 and 0.1700, respectively, for all 5336 independent reflections. The two manganese(III) atoms are bridged by a phenolato-oxygen atom of L NO23– and a μ -oxido-oxygen atom, where each manganese(III) atom is further coordinated by phenolato-oxygen, imino- and imidazolidine-nitrogen atoms of L NO23– in a meridional fashion and a chlorido ligand to form a distorted octahedral geometry.