Chloro-bridged complexes of copper(II) and manganese(II) derived from unsymmetric bidentate ligands: synthesis, crystal structure and characterization

Song, Yenan; Xu, Zhanwei; Sun, Qingjin; Su, Biyun; Gao, Qingqing; Liu, Huaqiang; Zhao, Jianshe

doi:10.1080/00958970701266484

Cited by 11 publications

(6 citation statements)

References 36 publications

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“…Syntheses of L 1 and L 2 were performed according to already described procedures. 15,16 Synthesis of [(L 1 ) 4 Cu 4 (OH) 4 ](ClO 4 ) 4 •H 2 O (1). The ligand L 1 (4.70 mmol, 0.922 g) was dissolved in 5 mL of ethanol and then added dropwise to 1 equiv of Cu(ClO 4 ) 2 •6H 2 O (4.70 mmol, 1.740 g) dissolved in 12 mL of 96% ethanol under reflux.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

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Structural and Magnetic Characterization of a Tetranuclear Copper(II) Cubane Stabilized by Intramolecular Metal Cation−π Interactions

et al. 2013

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A novel tetranuclear copper(II) complex (1) was synthesized from the self-assembly of copper(II) perchlorate and the ligand N-benzyl-1-(2-pyridyl)methaneimine (L(1)). Single-crystal X-ray diffraction studies revealed that complex 1 consists of a Cu4(OH)4 cubane core, where the four copper(II) centers are linked by μ3-hydroxo bridges. Each copper(II) ion is in a distorted square-pyramidal geometry. X-ray analysis also evidenced an unusual metal cation-π interaction between the copper ions and phenyl substituents of the ligand. Calculations based on the density functional theory method were used to quantify the strength of this metal-π interaction, which appears as an important stabilizing parameter of the cubane core, possibly acting as a driving parameter in the self-aggregation process. In contrast, using the ligand N-phenethyl-1-(2-pyridyl)methaneimine (L(2)), which only differs from L(1) by one methylene group, the same synthetic procedure led to a binuclear bis(μ-hydroxo)copper(II) complex (2) displaying intermolecular π-π interactions or, by a slight variation of the experimental conditions, to a mononuclear complex (3). These complexes were studied by X-ray diffraction techniques. The magnetic properties of complexes 1 and 2 are reported and discussed.

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Section: ■ Experimental Sectionmentioning

confidence: 99%

“…Here we report on the synthesis and magnetic characterization of a cubane core hydroxo-bridged copper(II) complex obtained with the ligand N -benzyl-1-(2-pyridyl)methaneimine (L 1 ), as presented in Scheme . The copper(II) ions are found to interact in an unusual cation−π interaction with the benzyl substituents of the ligand.…”

Section: Introductionmentioning

confidence: 99%

Structural and Magnetic Characterization of a Tetranuclear Copper(II) Cubane Stabilized by Intramolecular Metal Cation−π Interactions

et al. 2013

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“…12 1 H NMR spectra of the ligands, the signal for the imine proton appeared as singlet peaks between 8.12 and 8.44 ppm [50,51]. The other singlet peaks observed upfield at 4.89 and 4.87 ppm were attributed to the CH 2 linker protons in L1 and L3, respectively [50].…”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 96%

“…The other singlet peaks observed upfield at 4.89 and 4.87 ppm were attributed to the CH 2 linker protons in L1 and L3, respectively [50]. In the 13 C NMR analysis of the ligands, the signals for the imine carbons appeared at around 159.0 ppm [50,51].…”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 98%

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Thiophene based imino-pyridyl palladium(II) complexes: Synthesis, molecular structures and Heck coupling reactions

Elantabli

Radebe

Motswainyana

et al. 2017

Journal of Organometallic Chemistry

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Iminopyridine Copper Complex‐Based Catalysts for 1,3‐Dienes Stereospecific Polymerization

Ricci¹,

Leone²,

Zanchin³

et al. 2023

Macro Chemistry & Physics

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Some novel copper complexes are synthesized by reacting copper(II) dichloride and copper(II) dibromide with a series of pyridyl-imine ligands differing in the nature of the substituents at the iminic carbon and at the imino nitrogen atom. All the complexes are characterized by analytical and infrared data: for some of them single crystals are obtained, and their molecular structure is determined by X-ray diffraction. The complexes are combined with methylaluminoxane (MAO) for the polymerization of 1,3-dienes (i.e., 1,3-butadiene and isoprene) obtaining active and selective catalysts and, in case of isoprene, polymers with quite unusual structures, i.e., predominantly alternating cis-1,4-alt-3,4 structures containing cis-1,4 units sequences within the polymer chain.

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Chloro-bridged complexes of copper(II) and manganese(II) derived from unsymmetric bidentate ligands: synthesis, crystal structure and characterization

Cited by 11 publications

References 36 publications

Structural and Magnetic Characterization of a Tetranuclear Copper(II) Cubane Stabilized by Intramolecular Metal Cation−π Interactions

Structural and Magnetic Characterization of a Tetranuclear Copper(II) Cubane Stabilized by Intramolecular Metal Cation−π Interactions

Thiophene based imino-pyridyl palladium(II) complexes: Synthesis, molecular structures and Heck coupling reactions

Iminopyridine Copper Complex‐Based Catalysts for 1,3‐Dienes Stereospecific Polymerization

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