A new diMn^III complex, [Mn₂L(OAc)₂(H₂O)](BPh₄)·3H₂O (1), obtained with the unsymmetrical N₃O₃-ligand H₃L = 1-[N-(2-pyridylmethyl),N-(2-hydroxybenzyl)amino]-3-[N′-(2-hydroxybenzyl),N′-(benzyl)amino]propan-2-ol, has been prepared and characterized. The unsymmetrical hexadentate ligand L³⁻ leads to coordination dissymmetry (dissimilar donor atoms) around each Mn ion (N₂O₄ and NO₄(solvent), respectively) leaving one labile site on one of the two Mn ions that facilitates interaction of the metal center with H₂O₂, as in Mn catalase. 1 is able to catalyze H₂O₂ disproportionation in acetonitrile, with second-order rate constant k_cat = 23.9(2) M⁻¹ s⁻¹. The accessibility of the Mn^II₂ state and the closeness of the two one-electron reduction processes suggest 1 employs Mn^III₂/Mn^II₂ oxidation states for catalysis.

一种新的diMn ^III络合物，[锰₂ L（OAC）₂（H ₂ O）]（BPH ₄）·3H ₂ O（1），与所述非对称得到Ñ ₃ ö ₃ -配体ħ ₃ L = 1- [ Ñ -（2-吡啶基甲基），N-（2-羟基苄基）氨基] -3- [ N '-（2-羟基苄基），N '-（苄基氨基）丙烷-2-醇已被制备和表征。不对称的六齿配体L ³⁻导致每个Mn离子（N ₂ O ₄和NO ₄）周围的配位不对称（不同的供体原子）（分别为溶剂）在Mn过氧化氢酶中，在两个Mn离子之一上留下一个不稳定的位点，该位点促进金属中心与H ₂ O _2的相互作用。1能够催化乙腈中的H ₂ O ₂歧化，其二阶速率常数k _cat  = 23.9（2）M ^-1  s ^-1。Mn ^II ₂态的可及性和两个单电子还原过程的接近性表明1采用Mn ^III ₂ / Mn ^II ₂氧化态进行催化。