Synthesis, structure and magnetism of three cubane Cu(II) and Ni(II) complexes based on flexible Schiff-base ligands

Lü, Zhengliang; Fan, Tao; Guo, Weiwei; Lü, Jing; Fan, Chunhua

doi:10.1016/j.ica.2013.02.030

Cited by 34 publications

(9 citation statements)

References 55 publications

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“…This J parameter matches well the values determined for a Ni II cubane cluster with a similar Schiff-base ligand. 57 Overall, all the obtained parameters compare well with the range of parameters given in the literature for other Ni II cubane clusters [56][57][58][59][60][61][62][63].…”

Section: Magnetic Propertiessupporting

confidence: 81%

Formation of Tetranuclear Nickel(II) Complexes with Schiff-Bases: Crystal Structures and Magnetic Properties

et al. 2020

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The cubane-type structure is a typical representative of tetranuclear coordination compounds. In this work, two anionic Schiff-base ligands, (L1)2− and (L2)2−, each offering an O^N^O coordination pocket, ligate four NiII ions into a [Ni4O4] cubane core. The ligands are H2L1 = 2−[[(3-ethoxy-2−hydroxyphenyl) methylene]amino]benzenemethanol and H2L2 = 2−[[(5-fluoro-2−hydroxyphenyl)methylene]amino]benzenemethanol. In both compounds, [Ni4(L1)4(EtOH)4] (1) and [Ni4(L2)4(MeOH)4] (2), alkoxy oxygens of the ligands act in a bridging μ3-O binding mode. Magnetic susceptibility and magnetization data for compounds 1 and 2 are presented. The Ni–O–Ni bond angles of the cubane core determined from single crystal X-ray diffraction data play a key role for a magneto-structural correlation. Dominant intracube ferromagnetic behavior is observed, and the coupling parameters were determined for both compounds, leading to nonzero spin ground states in accordance with the broadly accepted bond angle guideline.

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Section: Magnetic Propertiessupporting

confidence: 81%

Formation of Tetranuclear Nickel(II) Complexes with Schiff-Bases: Crystal Structures and Magnetic Properties

et al. 2020

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“…Generally, the p-p interactionbetween thepyrenyl aromatic ringsin the crystal packing is beneficial to the construction of highly ordered supramolecular structures [5].A dditionally, Schiff base ligands are one of the most commonligands which can be used for the assembly of functional complexes [6]. Therefore, complexes based on Schiff base ligands bearing apyrenylgroup may show novel structures and maybemultifunctional.…”

Section: Discussionmentioning

confidence: 99%

Crystal structure of (E)-N-(2-nitrobenzylidene)pyren-1-amine, C23H14N2O2

Wei¹,

Wang²

2014

Zeitschrift Für Kristallographie - New Crystal Structures

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“…As shown in Table 2, the Cu-O(hydroxy) bond lengths in the apical position (Cu1-O22 = 2.508(2) and Cu2-O22 = 2.380(2) Å) are longer than the Cu-O(hydroxy) bond lengths in the equatorial positions (Cu1-O1 = 2.029(2) and Cu3-O32 = 2.008(2)), which is consistent with analogous systems observed in the literature. 17,22,26,32 The NH amine of the Schiff base ligand plays a significant role in the hydrogen bonding. There are intramolecular and intermolecular hydrogen bonds between the hydrogen atoms of the NH groups of the amines with the oxygen atoms of hydroxyl groups.…”

Section: Description Of the Complexmentioning

confidence: 99%

Anion Modulated Structural Variations in Copper(II) Complexes with a Flexidentate Ligand Derived from 2-((2-aminoethyl)amino)ethan-1-ol: Synthesis and Spectroscopic and X-ray Structural Characterization

Vafazadeh¹,

Kazemi-nasab²,

Willis³

2019

ACSi

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Flexidentate ligand, HL has been prepared by the condensation of aminoethylethanolamine (AEEA) with benzoylacetone (bezac). On reaction with copper(II) salts it gives complexes CuLClO 4 .H 2 O (1), CuLN 3 (2) and [Cu 3 L 3 Br]Br 2. H 2 O (3). All complexes have been characterized by X-ray crystallography. The results show that the hydroxyl group of the flexidentate ligand can coordinate to the Cu(II) center or remain as an uncoordinated group. In (1), the coordination number around the copper(II) ion is five coordinated and the ligand is tetradentate with the OH group coordinated to the copper(II) ion. Complex (2) has a square planar geometry and the L − ligand is tridentate with the hydroxyl group left uncoordinated. The X-ray diffraction analysis of the trinuclear complex (3) shows that the copper(II) centers are five-coordinate and L − is a tetradentate ligand with the hydroxyl group being both terminal and bridging. The Hirshfeld surface analysis and the 2D fingerprint plot were used to analyze all of the intermolecular contacts in the crystal structures.

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Synthesis, structure and magnetism of three cubane Cu(II) and Ni(II) complexes based on flexible Schiff-base ligands

Cited by 34 publications

References 55 publications

Formation of Tetranuclear Nickel(II) Complexes with Schiff-Bases: Crystal Structures and Magnetic Properties

Formation of Tetranuclear Nickel(II) Complexes with Schiff-Bases: Crystal Structures and Magnetic Properties

Crystal structure of (E)-N-(2-nitrobenzylidene)pyren-1-amine, C23H14N2O2

Anion Modulated Structural Variations in Copper(II) Complexes with a Flexidentate Ligand Derived from 2-((2-aminoethyl)amino)ethan-1-ol: Synthesis and Spectroscopic and X-ray Structural Characterization

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