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首页> 外文期刊>Polyhedron: The International Journal for Inorganic and Organometallic Chemistry >Synthesis, structural and magnetic characterizations of new complexes of di-2,6-(2-pyridylcarbonyl)pyridine (pyCOpyCOpy) ligand We wish to dedicate this paper to Professor George Christou on the occasion of his 60th birthday in appreciation of his work on coordination chemistry and molecular magnetism.
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Synthesis, structural and magnetic characterizations of new complexes of di-2,6-(2-pyridylcarbonyl)pyridine (pyCOpyCOpy) ligand We wish to dedicate this paper to Professor George Christou on the occasion of his 60th birthday in appreciation of his work on coordination chemistry and molecular magnetism.

机译：二-2,6-（2-吡啶基羰基）吡啶（pyCOpyCOpy）配体的新配合物的合成，结构和磁性表征我们希望在乔治·克里斯图教授60岁生日之际将本文献给他，以感谢他在协调方面的工作化学和分子磁性。

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Using the di-2,6-(2-pyridylcarbonyl)pyridine ligand (L1) as starting framework, five new mononuclear complexes were obtained: [Cu(L1)(MeCN)(ClO _4)_2] (1) [Co(L1)(MeCN)(Br)_2]·MeCN (2), [Fe(L1)_2](BF_4)_2·MeOH·H _2O (3), [Cr(L2a)Cl_2]·2MeOH (where HL2a is (6-(hydroxyl(methoxy)(pyridin-2-yl)methyl)pyridin-2-yl)(pyridin-2-yl)methanone) (4) and one trinuclear [Ni~(II) _3] complex, [Ni _3(L_2b)_2(Bz)_2(EtOH)_2](ClO _4)_2·2EtOH (where HL2b is (6-(hydroxyl(ethoxy) (pyridin-2-yl)methyl)pyridin-2-yl)(pyridin-2-yl)methanone; Bz = benzoato) (5). Their structural and magnetic characterizations are herein reported. All the metal ions show octahedral coordination geometry, which is slightly unusual for the L1-based Cu(II) complex 1. Formation of complexes 4 and 5 is accompanied by the metal-assisted solvent addition to one carbonyl group of the L1 ligand with methanol or ethanol leading to the deprotonated mono-hemiacetals L2a and L2b ligands respectively. The trinuclear [Ni~(II) _3] compound 5 shows two different bridging units: two L2b units and two benzoato (Bz) ligands. 5 represents the smallest polynuclear compound in the known {Ni ~(II)(L1-based)}_n (n = 5, 6) series. The magnetic properties of the five complexes have been investigated. While compounds 1-4 show the expected magnetic behavior for mononuclear species, 5 exhibits intramolecular ferromagnetic interactions between the Ni~(II) (S = 1) ions stabilizing an S_T = 3 ground state.
机译：使用二-2,6-（2-吡啶基羰基）吡啶配体（L1）作为起始框架，获得了五个新的单核络合物：[Cu（L1）（MeCN）（ClO _4）_2]（1）[Co（L1 ）（MeCN）（Br）_2]·MeCN（2），[Fe（L1）_2]（BF_4）_2·MeOH·H _2O（3），[Cr（L2a）Cl_2]·2MeOH（其中HL2a为（6） -（羟基（甲氧基）（吡啶-2-基）甲基）吡啶-2-基）（吡啶-2-基）甲酮）（4）和一种三核[Ni〜（II）_3]配合物[Ni _3（ L_2b）_2（Bz）_2（EtOH）_2]（ClO _4）_2·2EtOH（其中HL2b为（6-（羟基（乙氧基）（吡啶-2-基）甲基）吡啶-2-基）（吡啶-2 -基）甲酮; Bz =苯并（5）。本文报道了它们的结构和磁性特征。所有金属离子均显示八面体配位几何形状，这对于基于L1的Cu（II）配合物1来说是略微不同寻常的。配合物4和5的形成伴随着金属辅助溶剂的加入，其中甲醇通过甲醇添加到L1配体的一个羰基上或乙醇分别导致去质子化的单半缩醛L2a和L2b配体。三核[Ni〜（II）_3]化合物5显示两个不同的桥连单元：两个L2b单元和两个苯并（Bz）配体。 5表示已知的{Ni〜（II）（L1基）} _ n（n = 5，6）系列中最小的多核化合物。已经研究了五种配合物的磁性。化合物1-4显示了单核物种的预期磁行为，而化合物5显示了稳定S_T = 3基态的Ni〜（II）（S = 1）离子之间的分子内铁磁相互作用。

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