混合价双核锰[Mn2(cyclen)2(μ-O)2](ClO4)3·4H2O的晶体结构和表征

The mixed-valence manganese(Ⅲ/Ⅳ) complex Mn2(cyclen)2(μ-O)2](ClO4)3-4H2O (1) (cyclen=1,4,7,10-tetraazacyclododecan) with chemical formula C16H48Cl3Mn2N8O18 has been synthesized and characterized by single crystal X-ray diffraction analysis, elemental analysis, IR and electronic spectra. The results showed that the manganese(Ⅲ/Ⅳ) ions were six-coordinated by four nitrogen atoms from cyclen and two oxygen atoms from the oxygen bridge, forming a distorted octahedron geometry. There were two very strong peaks in the range of 400-700 nm in electronic spectrum, which was similar to Mn catalase and Mn ribonucleotide reductase extracted from organisms.Electrochemical study indicated that the complex underwent a quasi-reversible one-electron reduction and oxidation at E1/2=0.827 V in acetonitrile.

Crystal Structure and Characterization of a New Mixed‐valence Manganese(III/IV) Complex: [Mn2(cyclen)2(μ‐O)2](ClO4)3·4H2O

The mixed‐valence manganese(III/IV) complex Mn₂(cyclen)₂(μ‐O)₂](ClO₄)₃·4H₂O( 1 ) (cyclen=1,4,7,10‐tetra‐azacyclododecan) with chemical formula C₁₆H₄₈Cl₃Mn₂N₈O₁₈ has been synthesized and characterized by single crystal X‐ray diffraction analysis, elemental analysis, IR and electronic spectra. The results showed that the manganese(III/IV) ions were six‐coordinated by four nitrogen atoms from cyclen and two oxygen atoms from the oxygen bridge, forming a distorted octahedron geometry. There were two very strong peaks in the range of 400–700 nm in electronic spectrum, which was similar to Mn catalase and Mn ribonucleotide reductase extracted from organisms. Electrochemical study indicated that the complex underwent a quasi‐reversible one‐electron reduction and oxidation at E_1/2=0.827 V in acetonitrile.