title: Manganese clusters of aromatic oximes: synthesis, structure and magnetic properties.
abstract: With the aim of tuning the structures by using oxime ligands with different non-coordinating groups, three aromatic oxime ligands were designed by fusing oxime groups ([double bond, length as m-dash]N-OH) onto different non-coordinating groups. Their reactions with the corresponding Mn(ii) salts gave five manganese clusters [Mn(μ3-O)(L1)3(DMF)(H2O)3Cl]·2DMF·CH3OH (1), [Mn(μ3-O)(L2)3(OAc)(CH3OH)2] (2), [Mn(μ3-O)2(L2)6(H2O)(py)7](ClO4)2·py·0.5CH3OH·2H2O (3), [MnO4(L2)8(DMF)4]·DMF·6CH3CN (4), and [MnMnO4(L3)12]·3DMF·6H2O (5), in which H2L1, H2L2and HL3represent indane-1,2,3-trione-1,2-dioxime, acenaphthenequinone dioxime, and 9,10-phenanthrenedione-9-oxime, respectively. Their structures were determined and studied in detail. 1 and 2 show planar triangular trinuclear Mn structures. 3 has a hexanuclear Mn skeleton formed from two Mn triangular units through inter-trinuclear mutual coordination. 4 and 5 present octanuclear skeletons constructed from planar triangular Mn3O and tetrahedral Mn4O secondary building units, respectively, with different symmetries and different oxidation states of the manganese ions. Their structural studies reveal a significant contribution of the parent rings for fusing oxime groups, different non-coordinating groups and anions to the formation of different cluster skeletons. Their magnetic properties were investigated and simulated, which revealed the presence of dominant antiferromagnetic interactions between the metal ions in these compounds.
authors.affiliation: State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, P. R. China. zlchen@mailbox.gxnu.edu.cn.
authors.forename: Zilu
authors.initials: Z
authors.lastname: Chen
authors.affiliation: State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, P. R. China. zlchen@mailbox.gxnu.edu.cn.
authors.forename: Zhaobo
authors.initials: Z
authors.lastname: Hu
authors.affiliation: State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, P. R. China. zlchen@mailbox.gxnu.edu.cn.
authors.forename: Yisheng
authors.initials: Y
authors.lastname: Li
authors.affiliation: State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, P. R. China. zlchen@mailbox.gxnu.edu.cn.
authors.forename: Yuning
authors.initials: Y
authors.lastname: Liang
authors.affiliation: State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, P. R. China. zlchen@mailbox.gxnu.edu.cn.
authors.forename: Xinyu
authors.initials: X
authors.lastname: Wang
authors.affiliation: State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, P. R. China. zlchen@mailbox.gxnu.edu.cn.
authors.forename: Li
authors.initials: L
authors.lastname: Ouyang
authors.affiliation: State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, P. R. China. zlchen@mailbox.gxnu.edu.cn.
authors.forename: Qin
authors.initials: Q
authors.lastname: Zhao
authors.affiliation: State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, P. R. China. zlchen@mailbox.gxnu.edu.cn.
authors.forename: Haiyan
authors.initials: H
authors.lastname: Cheng
authors.affiliation: State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, P. R. China. zlchen@mailbox.gxnu.edu.cn and Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, P. R. China. fliangoffice@yahoo.com.
authors.forename: Fupei
authors.initials: F
authors.lastname: Liang