کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1338556 | 979671 | 2011 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: An antiferromagnetically coupled dimeric Ni(II) complex anion and its counter cationic monomeric Ni(II) complex, and some other mononuclear transition metal compounds using some neutral ligands An antiferromagnetically coupled dimeric Ni(II) complex anion and its counter cationic monomeric Ni(II) complex, and some other mononuclear transition metal compounds using some neutral ligands](/preview/png/1338556.png)
Synthesis and single crystal X-ray diffraction studies of four transition metal complexes [Mn(L1)](ClO4)2 (1), [Cu(L1)](ClO4)2 (2), [Ni2(L2)(NCS)6][Ni(L1)] (3) and [Mn(bzpy)(NCS)2] (4) with neutral ligands [L1 = N-(1-pyridin-2-yl-phenylidene)-N′-[2-({2-[(1-pyridin-2-yl phenylidene)amino]ethyl}amino)ethyl]ethane-1,2diamine, L2 = N-(1-pyridin-2-yl-phenylidene)-N′-[2-({2-[(1-pyridin-2-ylphenylidene)amino]ethyl}piperazine-1yl)ethyl]amine, bzpy = 2-benzoylpyridine] are reported. The trinuclear nickel(II) complex 3 is made of a dinuclear anion and a mononuclear cation. Variable-temperature magnetic susceptibility and variable-field magnetisation studies performed on 3 suggest weak antiferromagnetic coupling (J = −0.7 cm−1) between the two metals of the dinuclear entity, but no magnetic interaction between the anionic and cationic counterparts.
Synthesis and single crystal X-ray diffraction studies of four transition metal complexes [Mn(L1)](ClO4)2 (1), [Cu(L1)](ClO4)2 (2), [Ni2(L2)(NCS)6][Ni(L1)] (3) and [Mn(bzpy)(NCS)2] (4) with neutral ligands [L1 = N-(1-pyridin-2-yl-phenylidene)-N′-[2-({2-[(1-pyridin-2-yl phenylidene)amino]ethyl}amino)ethyl]ethane-1,2diamine, L2 = N-(1-pyridin-2-yl-phenylidene)-N′-[2-({2-[(1-pyridin-2-ylphenylidene)amino]ethyl}piperazine-1yl)ethyl]amine, bzpy = 2-benzoylpyridine] are reported. The trinuclear nickel(II) complex 3 is made of a dinuclear anion and a mononuclear cation. Variable-temperature magnetic susceptibility and variable-field magnetization studies performed on 3 suggest weak antiferromagnetic coupling (J = −0.7 cm−1) between the two metals of the dinuclear entity, but no magnetic interaction between the anionic and cationic counterparts.Figure optionsDownload as PowerPoint slideHighlights
► Synthetic coordination chemistry.
► Chemistry of Schiff bases as ligands.
► Molecular magnetism.
Journal: Polyhedron - Volume 30, Issue 12, 2 August 2011, Pages 2032–2037