In methanol, the reaction of Cu(ClO(4))(2).6H(2)O and the hexadentate amine phenol ligand (H(2)bahped) in the presence of triethylamine affords a tetranuclear copper(II) complex having the formula [Cu(4)(mu(4)-O)(bahped)(2)](ClO(4))(2). The X-ray structure of this complex shows a tetrahedral central [Cu(II)(4)(mu(4)-O)]unit coordinated to two hexadentate bridging (via the central ethylenediamine part) ligands. The compound is the first example of a mu(4)-oxo tetranuclear copper(II) complex without any bridging ligand along the six tetrahedral edges. Variable-temperature magnetic data clearly show an S(t) = 0 spin ground state for antiferromagnetic interactions between four (2)B(2) copper(II) ions in a dimer of dimers.
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
Abstract A carboxyamine functionalized tridentate ligand in combination with three different carboxylate bridging groups (RCO 2 − ; R=CH 3 , C 2 H 5 and CF 3 ) has been utilized to prepare tetra‐ and pentanuclear nickel(II) complexes, [Ni 4 (L) 2 ( μ 3 ‐OCH 3 ) 2 ( μ 1,1 ‐O 2 CCH 3 ) 2 ( μ 1,3 ‐O 2 CCH 3 ) 2 (CH 3 OH) 2 ] ( 1 ), [Ni 4 (L) 2 ( μ 3 ‐OCH 3 ) 2 ( μ 1,1 ‐O 2 CC 2 H 5 ) 2 ( μ 1,3 ‐O 2 CC 2 H 5 ) 2 (CH 3 OH) 2 ] ( 2 ) and [Ni 5 (L) 4 ( μ 3 ‐OH) 2 ( μ 1,3 ‐O 2 CCF 3 ) 2 ]Br 2 ⋅ 3H 2 O ( 3 ) (HL=3‐[(2‐pyridylmethyl)‐amino]‐propionic acid). The complexes have been characterized using several techniques such as elemental analysis, solution electrical conductivity, FTIR and UV‐Vis spectroscopy, and low temperature magnetic measurements. While complex 1 and 3 were further characterized using single crystal X‐ray diffraction, molecular structure of complex 2 has been optimized using DFT calculation. Whereas the acetate/propionate groups deliver Ni 4 cluster, the trifluoroacetate group provides Ni 5 assembly. Molecular structures of complexes 1 and 2 comprise a central [Ni 4 O 6 ] core that could be described as a distorted face‐shared dicubane with two missing vertices. On the other hand, the [Ni 5 ( μ 3 ‐OH) 2 ( μ 1,3 ‐O 2 CCF 3 ) 2 ] 6+ structural core of complex 3 contains five coplanar nickel(II) ions in a rectangular organization. Variable‐temperature magnetic susceptibility studies reveal the interesting magnetic properties of complexes 1 and 3 . While complex 1 shows both ferro‐ and antiferromagnetic interactions with J 1 =−1.10 cm −1 , J 2 =+2.40 cm −1 and J 3 =−0.65 cm −1 , complex 3 exhibits only ferromagnetic interactions with J 1 =+2.0 cm −1 and J 2 =+1.0 cm −1 .
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
A family of biologically active novel zinc(II) compounds, namely [Zn(ahpa)(Cl)(H2O)] (1), [Zn(ahpa)(NO3)(H2O)] (2) and [Zn(ahpa)(H2O)2](ClO4) (3) of anthracene-appended multifunctional organic scaffold, Hahpa (Hahpa = 3-((anthracene-10-ylmethyl)(2-hydroxyethyl)amino)propanoic acid) were synthesized and characterized....
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
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