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首页> 外文期刊>Spectrochimica acta, Part A. Molecular and biomolecular spectroscopy >Spectral and thermal study on the adduct formation between square planar nickel(II) chelates and some bidentate ligands
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Spectral and thermal study on the adduct formation between square planar nickel(II) chelates and some bidentate ligands

机译:方形平面镍(II)螯合物与一些双齿配体之间加合物形成的光谱和热学研究

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摘要

Adducts of Ni(II)-square planar complexes [Ni(beta-dik)(Me(4)en)](+), with a series of bidentate ligands (L), where beta-dik = acetylacetonate (acac) and benzoylacetonate (bzac), Me(4)en = N,N,N',N'-tetramethylethylenediamine and L = Me(4)en, 2,2'-bipyridine (bipy), ethylenediamine (en) and oxalate (C2O42-) have been synthesized and characterized by spectral, thermal and magnetic measurements. Formation constants of the adducts formed from a series of ternary mixed Ni(II) complexes with the general formula [Ni(beta-dik)(diam)](+) with 1,10-phenanthroline (phen), 2,2'-bipyridine (bipy) and pyridine were spectrophotometrically determined. Thermodynamic parameters of the adduct formation between nickel(II) square-planar chelates and pyridine (py), 2,2'-bipyridine (bipy) and acetylacetone (acac) were also spectrophotometrically determined in 1,2-dichloroethane. The thermal stability of the isolated adducts was studied using thermogravimetry and the decomposition schemes of the adducts were given. (c) 2005 Elsevier B.V. All rights reserved.
机译:Ni(II)-正方形平面络合物[Ni(β-dik)(Me(4)en)](+)与一系列双齿配体(L)的加合物,其中β-dik=乙酰丙酮酸酯(acac)和苯甲酰丙酮酸酯(bzac),Me(4)en = N,N,N',N'-四甲基乙二胺和L = Me(4)en,2,2'-联吡啶(bipy),乙二胺(en)和草酸酯(C2O42-)已通过光谱,热和磁测量进行了合成和表征。由一系列通式为[Ni(β-dik)(diam)](+)与1,10-菲咯啉(phen),2,2'-的三元混合Ni(II)配合物形成的加合物的形成常数分光光度法测定联吡啶(联吡啶)和吡啶。也在1,2-二氯乙烷中用分光光度法测定了镍(II)方平面螯合物与吡啶(py),2,2'-联吡啶(bipy)和乙酰丙酮(acac)之间形成加合物的热力学参数。使用热重分析法研究了分离的加合物的热稳定性,并给出了加合物的分解方案。 (c)2005 Elsevier B.V.保留所有权利。

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