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首页> 外文期刊>Crystal growth & design >Palladium(II)-Copper(II) Assembling with Bis(2-pyridylcarbonyl)amidate and Bis(oxamate) Type Ligands
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Palladium(II)-Copper(II) Assembling with Bis(2-pyridylcarbonyl)amidate and Bis(oxamate) Type Ligands

机译:双(2-吡啶基羰基羰基)酰胺酸酯和双(草酸酯)型配体组装的钯(II)-铜(II)

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摘要

Five new complexes of formula K-4[Pd-2(mpba)(2)] . 4H(2)O (1), {[K-4(H2O)(dmso)][Pd-2(mpba)(2)]} (2), {[Cu(bpca)](4)[Pd-2(mpba)(2)]} . 6H(2)O (3), {[Cu(bpca)](2)[Pd(opba)]} . 1.75dmso . 0.25H(2)O (4), {[Cu(bpca)](2)[Pd(opba)]}(n) . ndmso (5) [H(4)mpba =1,3-phenylenebis(oxamic acid), H(4)opba = 1,2-phenylenebis(oxamic acid), Hbpca = bis(2-pyridylcarbonyl)amide, and dmso = dimethyl sulfoxide] have been prepared and investigated by infrared spectroscopy, thermal analysis, single crystal X-ray diffraction, and magnetic susceptibility techniques. The structure of 2 consists of a [Pd-2(mpba)(2)](4) anionic entity in which the palladium(II) cations are coordinated by two mpba ligands resulting in a dipalladium(II) unit that acts as a ligand toward potassium(I) cations leading to a neutral three-dimensional network. Compound 3 is a neutral hexanuclear complex where the dinuclear [Pd-2(mpba)(2)](4) unit adopts a tetrakis(bidentate) coordination mode toward four [Cu(bpca)](+) end-cap entities. This compound can be viewed as a dimer of trimers in which two Cu-II-Pd-II-Cu-II trinuclear units are connected by two mpba ligands. Compounds 4 and 5 have in common the presence of a [Pd(opba)](2) unit, which acts as a bis(bidentate) ligand toward two [Cu(bpca)](+) entities to afford neutral heterotrinuclear Cu-II-Pd-II-Cu-II motifs that are interlinked through weak double (4) and single (5) out-of-plane copper(II) to carbonyl(bpca)-oxygen atoms leading to uniform linear (4) and zigzag (5) chains of heterobimetallic trinuclear units. The investigation of the magnetic properties of 3-5 in the 1.9300 K temperature range reveals the presence of very weak antiferromagnetic interactions between the copper(II) ions. The nature and magnitude of these magnetic interactions are discussed in terms of orbital symmetry considerations.
机译:五个新的式K-4 [Pd-2(mpba)(2)]的配合物。 4H(2)O(1),{[K-4(H2O)(dmso)] [Pd-2(mpba)(2)]}(2),{[Cu(bpca)](4)[Pd- 2(mpba)(2)]}。 6H(2)O(3),{[Cu(bpca)](2)[Pd(opba)]}。 1.75dmso。 0.25H(2)O(4),{[Cu(bpca)](2)[Pd(opba)]}(n)。 ndmso(5)[H(4)mpba = 1,3-亚苯基双(草酰胺酸),H(4)opba = 1,2-亚苯基双(草酰胺酸),Hbpca =双(2-吡啶基羰基)酰胺和dmso =二甲基亚砜]已经制备并通过红外光谱,热分析,单晶X射线衍射和磁化率技术进行了研究。 2的结构由[Pd-2(mpba)(2)](4)阴离子实体组成,其中钯(II)阳离子由两个mpba配体配位,形成了作为配体的二钯(II)单元朝向钾(I)阳离子,从而形成中性的三维网络。化合物3是中性的六核络合物,其中双核[Pd-2(mpba)(2)](4)单元对四个[Cu(bpca)](+)端帽实体采用四(双齿)配位模式。该化合物可视为三聚体的二聚体,其中两个Cu-II-Pd-II-Cu-II三核单元通过两个mpba配体连接。化合物4和5共有一个[Pd(opba)](2)单元,该单元可作为朝向两个[Cu(bpca)](+)实体的双(双齿)配体,提供中性异三核Cu-II -Pd-II-Cu-II基序通过弱双(4)和单(5)平面外铜(II)相互连接成羰基(bpca)-氧原子,从而产生均匀的线性(4)和锯齿形( 5)异双金属三核单元链。在1.9300 K温度范围内对3-5的磁性进行的研究表明,铜(II)离子之间存在非常弱的反铁磁相互作用。这些磁性相互作用的性质和大小是根据轨道对称性考虑进行讨论的。

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