A direct route to obtain manganese(III) complexes with a new class of asymmetrical Schiff base ligands

被引:56
作者
Bermejo, MR [1 ]
González, AM
Fondo, M
Garcia-Deibe, A
Maneiro, M
Sanmartín, J
Hoyos, OL
Watkinson, M
机构
[1] Univ Santiago de Compostela, Fac Quim, Dept Quim Inorgan, E-15706 Santiago, Spain
[2] Univ Cauca, Dept Quim, Popayan, Colombia
[3] Queen Mary Univ London, Dept Chem, London E1 4NS, England
关键词
D O I
10.1039/b000235f
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A new class of asymmetrically substituted Schiff base ligands has been synthesised incorporating hard amido donor atoms. The single crystal X-ray structure of one of these ligands, H-3-amsal, has been determined [H-3-amsal = 3-aza-4-(2-hydroxyphenyl)-N-(2-hydroxyphenyl)but-3-enamide]. The structure reveals the ligand to be suitable for use as an equatorially co-ordinating ligand in octahedral complexes. A new route to obtaining manganese(III) complexes of these ligands, with high yield and purity, has been designed. Complexes of the form Mn-III(amsal-R) (H2O)(n) (n = 1-4) have been prepared by the electrochemical oxidation of a manganese anode in an acetonitrile solution of the ligands. The compounds have been characterised by elemental analyses, IR and H-1 NMR spectroscopies, FAB mass spectrometry, magnetic measurements, Lambda(M) and cyclic voltammetry.
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页码:235 / 241
页数:7
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