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

Crystal Structure of μ-Oxido-μ-phenolato-bridged Dinuclear Manganese(III) Complex of Schiff-base Ligand with Bromido Coordination

“…The crystal structure of [ 11 2). A severe distortion may reflect a pseudo Jahn-Teller distortion of the high-spin Mn(III) state, which was supported by a bond valence sum calculation and the steric requirement of the Schiff-base ligand.…”

“…A severe distortion may reflect a pseudo Jahn-Teller distortion of the high-spin Mn(III) state, which was supported by a bond valence sum calculation and the steric requirement of the Schiff-base ligand. 11 The coordination of the bromido ligand to manganese may be a novel case, because we usually obtained manganese complexes containing free Brfrom coordination to manganese center. [4][5][6] In the crystal, there are hydrogen-bondings between the triethylammonium ion and μ-oxido-oxygen atom (O7) [N5- 3).…”

“…[4][5][6] In the crystal, there are hydrogen-bondings between the triethylammonium ion and μ-oxido-oxygen atom (O7) [N5- 3). 11 In this study, we could isolate a new dinuclear manganese(III) complex with bromido coordination by using the Schiff-base ligand, LNO2 3-, which affords a coordination space for a Brion in the dinuclear cluster. Prime denotes the symmetry code: (x, 3/2-y, z).…”

“…Manganese complexes are interesting compounds because of their diversity in the molecular structures and relevance to redox manganese enzymes, such as manganese catalase and an oxygen evolving complex of photosystem II. [1][2][3][4][5][6][7][8][9][10][11] Recently, we reported on the crystal structure of the dinuclear manganese(III) complex with a Schiff-base ligand having three phenolate donor atoms: 2-(5-nitro-2-hydroxyphenyl)-1,3-bis(2-(5-nitro-2-hydroxybenzylidene amino) ethyl)imidazolidine (H3LNO2), [(C2H5)3NH][Mn2(μ-LNO2)(μ-O)Cl2]•2THF; each manganese atom is coordinated by a phenolato-oxygen, imino-and imidazolidine-nitrogen atoms of LNO2 3in a meridional fashion and a chlorido ligand and the two manganese atoms are bridged by the third phenolato-oxygen atom of LNO2 3and a μ-oxido oxygen atom to form a distorted octahedral geometry. 11 It is interesting that a chlorido ligand is coordinated to a manganese atom in this complex, because the chloride and bromide ions are known to be an effective factor in the oxygen evolution activity of photosystem II.…”