Mixed-valent tetranuclear manganese complexes with pentadentate Schiff-base ligand having a Y-shaped core |
| |
| Authors: | Masahiro Mikuriya Sayuri Kudo Chisa Matsumoto Satoshi Kurahashi Seiki Tomohara Yoshiki Koyama Daisuke Yoshioka Ryoji Mitsuhashi |
| |
| Affiliation: | 1.Department of Applied Chemistry for Environment and Research Center for Coordination Molecule-based Devices, School of Science and Technology,Kwansei Gakuin University,Sanda,Japan |
| |
| Abstract: | Reaction of pentadentate Schiff-base ligands, 1,3-bis(3-methoxysalicylideneamino)-2-propanol (H3msap) with manganese(II) salts afforded tetranuclear mixed-valent manganese complexes, [Mn4(msap)2(CH3CO2)3(CH3O)(H2O)]·H2O (1) and [Mn4(msap)2(C6H5CO2)3(CH3O)] (2), which were characterized by elemental analysis, infrared and diffused reflectance spectra and temperature dependence of magnetic susceptibilities (4.5–300 K). Single-crystal X-ray crystallography of these complexes showed that four manganese atoms are chelated by two Schiff-base ligands and further coordinated by syn–syn bridging, syn–anti bridging, and monodentate or bidentate-carboxylato groups, forming a Y-shaped cluster made up of two MnII and two MnIII atoms. Diffused reflectance spectra are featureless, showing broad bands around at near-UV and visible regions. Magnetic moments decrease with lowering of temperature, showing an antiferromagnetic behavior of these complexes. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
