期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 75, 期 1, 页码 235-242出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2009.10.018
关键词
Manganese (III) complexes; Tetradentate Schiff base ligand; Spectroscopy; Thermal behaviour
类别
The Schiff base tetradentate ligands N,N-bis-(3,5-dimethyl-1-p-tolyl-1H-pyrazol-4-ylmethylene)-ethane-1,2-diamine (H2L1), N,N-bis-(3,5-dimethyl-1-p-sulfonyl-1H-pyrazol-4-ylmethylene)-ethane-1,2-diamine (H2L2), N,N-bis-(3,5-dimethyl-1-p-tolyl-1H-pyrazol-4-ylmethylene)-benzene-1,2-diamine (H2L3) and N,N-bis-(3,5-dimethyl-1-p-sulfonyl-1H-pyrazol-4-ylmethylene)-benzene-1,2-diamine (H2L4) were prepared from the reaction between 5-oxo-3-methyl-1-p-tolyl-1H-pyrazole-4-carbaldehyde or 4-(4-formyl-5-oxo-3-methhyl-pyrazol-1-yl)-benzenesulfonic acid and o-phenylenediamine or ethylenediamine. And these are characterized by elemental analysis, FT-IR. H-1 NMR and GC-MS. The corresponding Schiff base complexes of Mn(Ill) Were prepared by condensation of [Mn-3(mu(3)-O)(OAc)(6)(H2O)(3)]center dot 3H(2)O with ligands H2L1, H2L2, H2L3 and H2L4. All these complexes have been characterized by elemental analysis, magnetic susceptibility, X-ray crystallography, conductometry measurement, FT-IR, electronic spectra and mass (FAB) spectrometry. Thermal behaviour of the complexes has been studied by TGA, DTA and DSC. Electronic spectra and magnetic susceptibility measurements indicate octahedral stereochemistry of manganese (III) complexes, while non-electrolytic bahaviour complexes indicate the absence Of counter ion. (C) 2009 Published by Elsevier B.V.
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