کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1340135 | 979722 | 2009 | 10 صفحه PDF | دانلود رایگان |
Some new tetradentate ligands with a NNOS coordination sphere were prepared and their corresponding nickel(II) complexes were synthesized and characterized by elemental analysis, IR, 1H NMR, UV–Vis and mass spectrophotometry. The thermodynamic formation constants of the complexes were measured spectrophotometrically, at a constant ionic strength of 0.1 M (NaClO4) at 25 °C in DMF solvent. The trend of the complex formation for nickel is as follows:[Ni(cdMesalen)] > [Ni(cdsalen)] > [Ni(cdPhsalen)][Ni(cdMesalMeen)] > [Ni(cdsalMeen)] > [Ni(cdPhsalMeen)[Ni(cd5OMesalen)] > [Ni(cd3OMesalen)] > [Ni(cd4OMesalen)][Ni(cd5OMesalen)] > [Ni(cdsalen)] > [Ni(cd5Brsalen)] > [Ni(cd5Clsalen)] > [Ni(cd5SO3Nsalen)] > [Ni(cd5SO3Nasalen)][Ni(cd5OMesalMeen)] > [Ni(cdsalMeen)] > [Ni(cd5BrsalMeen)] > [Ni(cd5ClsalMeen)] > [Ni(cd5SO3NasalMeen)] > [Ni(cd5NO2salMeen)]and[Ni(cdXsalMeen)] > [Ni(cdXsalen)].The structure of {methyl-2-[N-[2-(5-chloro-2-phenolate)methylidynenitrilo]ethyl}aminato(-1)-1-cyclopentenedithiocarboxylate nickel(II), [Ni(cd5Clsalen)], has been determined by X-ray crystallography. The coordination around nickel is essentially square-planar with a small tetrahedral distortion.
Some new tetradentate ligands with a N2OS coordination sphere were prepared and their corresponding nickel(II) and copper(II) complexes were synthesized. The thermodynamic formation constants of the complexes were measured spectrophotometrically at 25 °C in DMF solvent. The structure of {methyl-2-[N-[2-(5-chloro-2-phenolate)methylidynenitrilo]ethyl}aminato(-1)-1-cyclopentenedithiocarboxyla-te nickel(II), [Ni(cd5Clsalen)], has been determined by X-ray crystallography. The coordination around nickel is essentially square-planar, with a small tetrahedral distortion.Figure optionsDownload as PowerPoint slide
Journal: Polyhedron - Volume 28, Issue 8, 10 June 2009, Pages 1409–1418