کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1338036 | 979657 | 2007 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Syntheses and EPR spectral studies of manganese(II) complexes derived from pyridine-2-carbaldehyde based N(4)-substituted thiosemicarbazones: Crystal structure of one complex Syntheses and EPR spectral studies of manganese(II) complexes derived from pyridine-2-carbaldehyde based N(4)-substituted thiosemicarbazones: Crystal structure of one complex](/preview/png/1338036.png)
Five manganese(II) complexes {[MnL12]·H2O·EtOH (1), [Mn(L1)(HL1)]OAc (2), [MnL22]·3H2O (3), [MnL32]·3H2O (4) and [Mn(HL3)2](SCN)2 · MeOH (5)} of three NNS donor N(4)-substituted thiosemicarbazone ligands {pyridine-2-carbaldehyde N(4)-p-methoxyphenyl thiosemicarbazone [HL1], pyridine-2-carbaldehyde N(4)-2-phenethyl thiosemicarbazone [HL2] and pyridine-2-carbaldehyde N(4)-methyl, N(4)-phenyl thiosemicarbazone [HL3]} were synthesized and physico-chemically characterized. Compound 1 crystallized as [MnL12]·H2O and its structure has been determined by X-ray diffraction studies. It is found to have a distorted octahedral geometry. EPR spectra in DMF solutions at 77 K show hyperfine sextets with low intensity forbidden lines lying between each of the two main hyperfine lines.
Five manganese(II) complexes {[MnL12]·H2O·EtOH, [Mn(L1)(HL1)]OAc, [MnL12]·3H2O, [MnL12]·3H2O and [Mn(HL3)2](SCN)2 · MeOH} of three NNS donor N(4)-substituted thiosemicarbazone ligands {pyridine-2-carbaldehyde N(4)-p-methoxyphenyl thiosemicarbazone [HL1], pyridine-2-carbaldehyde N(4)-2-phenethylthiosemicarbazone [HL2] and pyridine-2-carbaldehyde N(4)-methyl, N(4)-phenyl thiosemicarbazone [HL3]} were synthesized and physico-chemically characterized. The crystal structure of the compound [MnL12]·H2O has been determined by X-ray diffraction studies. It is found to have a distorted octahedral geometry. EPR spectra in DMF solutions at 77 K show hyperfine sextets with low intensity forbidden lines lying between each of the two main hyperfine lines.Figure optionsDownload as PowerPoint slide
Journal: Polyhedron - Volume 26, Issue 17, 30 October 2007, Pages 5088–5094