Dinuclear Manganese(III) Complex with a Schiff-base Having a Di-μ-acetato-μ-alkoxido-bridged Core

Mikuriya, Masahiro; Koyama, Yasushi; Yoshioka, Daisuke; Mitsuhashi, Ryoji

doi:10.2116/xraystruct.36.7

Cited by 4 publications

(3 citation statements)

References 11 publications

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“…And the IR results are consistent with the single crystal X-ray structure determination of the Ca(II) complex. a racted much interest because of their coordination diversity [22][23][24]. Calcium (Ca) is the fifth most common element on the earth, and has the advantages of being lightweight, low cost, environmentally friendly, and having a relatively low production cost.…”

Section: Infrared Spectrummentioning

confidence: 99%

“…However, the above studies of complex materials have focused on transition metal and rare earth complexes. The bis-Schiff base metal complexes derived from 1,3-diamino-2-hydroxypropane have attracted much interest because of their coordination diversity [ 22 , 23 , 24 ]. Calcium (Ca) is the fifth most common element on the earth, and has the advantages of being lightweight, low cost, environmentally friendly, and having a relatively low production cost.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis, Structural Characterization, Hirschfeld Surface Analysis, Density Functional Theory, and Photocatalytic CO2 Reduction Activity of a New Ca(II) Complex with a Bis-Schiff Base Ligand

Tai,

Yan,

Wang

2024

Molecules

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A new bis-Schiff base (L) Ca(II) complex, CaL, was synthesized by the reaction of calcium perchlorate tetrahydrate, 1,3-diamino-2-hydroxypropane, and 2-formyl phenoxyacetic acid in an ethanol–water (v:v = 2:1) solution and characterized by IR, UV-vis, TG-DTA, and X-ray single crystal diffraction analysis. The structural analysis indicates that the Ca(II) complex crystallizes in the monoclinic system, space group P121/n1, and the Ca(II) ions are six-coordinated with four O atoms (O8, O9, O11, O12, or O1, O2, O4, O6) and two N atoms (N1, N2, or N3, N4) of one bis-Schiff base ligand. The Ca(II) complex forms a tetramer by intermolecular O-H…O hydrogen bonds. The tetramer units further form a three-dimensional network structure by π–π stacking interactions of benzene rings. The Hirschfeld surface of the Ca(II) complex shows that the H…H contacts represent the largest contribution (41.6%) to the Hirschfeld surface, followed by O…H/H…O and C…H/H…C contacts with contributions of 35.1% and 18.1%, respectively. To understand the electronic structure of the Ca(II) complex, the DFT calculations were carried out. The photocatalytic CO2 reduction test of the Ca(II) complex exhibited a yield of 47.9 μmol/g (CO) and a CO selectivity of 99.3% after six hours.

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Section: Infrared Spectrummentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis, Structural Characterization, Hirschfeld Surface Analysis, Density Functional Theory, and Photocatalytic CO2 Reduction Activity of a New Ca(II) Complex with a Bis-Schiff Base Ligand

Tai,

Yan,

Wang

2024

Molecules

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“…In the crystals, the Schiff bases take a "bent" [11][12][13][14][15]34] or "folded" [16] structure with the salicylideneaminomethyl moieties being close to planar. When the Schiff-base ligands are coordinated to two metal atoms with two phenolic-oxygen, two imino-nitrogen, and one bridging alkoxido-oxygen donor atom with a pair of tridentate O, N, O-chelates, Mn III 2 , Fe III 2 , Co III 2 , Ni II 2 , and Cu II 2 complexes were reported as this type of dinuclear species [17][18][19][20][21][22][23][24][25][26][27][28][29]. On the other hand, these Schiff-base ligands form mononuclear metal species with a tetradentate O, N, N, O-chelate as shown in the case for 1,3-bis(5chlorosalicylideneamino)-2-propanol in Figure 1b, where the central alcohol group remains protonated and does not participate in coordination to the metal center.…”

Section: Introductionmentioning

confidence: 99%

Mixed-Valent Trinuclear CoIII-CoII-CoIII Complex with 1,3-Bis(5-chlorosalicylideneamino)-2-propanol

Mikuriya

Naka²,

Inaoka³

et al. 2022

Molecules

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A mixed-valent trinuclear complex with 1,3-bis(5-chlorosalicylideneamino)-2-propanol (H3clsalpr) was synthesized, and the crystal structure was determined by the single-crystal X-ray diffraction method at 90 K. The molecule is a trinuclear CoIII-CoII-CoIII complex with octahedral geometries, having a tetradentate chelate of the Schiff-base ligand, bridging acetate, monodentate acetate coordination to each terminal Co3+ ion and four bridging phenoxido-oxygen of two Schiff-base ligands, and two bridging acetate-oxygen atoms for the central Co2+ ion. The electronic spectral feature is consistent with the mixed valent CoIII-CoII-CoIII. Variable-temperature magnetic susceptibility data could be analyzed by consideration of the axial distortion of the central Co2+ ion with the parameters Δ = –254 cm−1, λ = –58 cm−1, κ = 0.93, tip = 0.00436 cm3 mol−1, θ = –0.469 K, gz = 6.90, and gx = 2.64, in accordance with a large anisotropy. The cyclic voltammogram showed an irreversible reduction wave at approximately −1.2 V·vs. Fc/Fc+, assignable to the reduction of the terminal Co3+ ions.

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Mixed-valent Manganese Complex with a Schiff-base Having a Di-μ4-oxido-di-μ3-oxido-di-μ3-carboxylato-hexa-μ-carboxylato-bridged MnII2MnIII6 Core

Mikuriya

Koyama

KAMIOKA

et al. 2022

X-ray Structure Analysis Online

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Di-μ4-oxido-di-μ3-oxido-bis(μ3-4-chlorobenzoato)-hexakis(μ-4-chlorobenzoato)-bridged octanuclear manganese(II,III) complex with 1,3-bis(3-methoxy-5-nitrosalicylideneamino)-2-propanol (H3mnsap), [Mn8(μ-mnasp)2(μ4-O)2(μ3-O)2(μ3-ClC6H4COO)2(μ-ClC6H4COO)6(CH3OH)2(H2O)2]•2CH3OH•C2H5OC2H5, was prepared, and the crystal structure was determined by the single-crystal X-ray diffraction method at 90 K. The complex crystallizes in in the triclinic space group P1 with a = 13.6900(16)Å, b = 14.8751(17)Å, c = 16.1495(18)Å, α = 90.665(2)°, β = 105.392(2)°, γ = 115.948(2)°, V = 2820.0(6)Å 3 , Dx = 1.694 g/cm 3 , and Z = 1. The R1 [I > 2σ(I)] and wR2 (all data) values are 0.0672 and 0.1864, respectively, for all 12624 independent reflections. A crystal-structure analysis revealed a crystallographic centrosymmetric mixed-valent octanuclear Mn II 2Mn III 6 complex, where two Mn II Mn III dinuclear moieties bridged by alcoholato-oxygen of mnasp 3are connected by two μ3-oxido and two μ4-oxido oxygen atoms and six syn-syn-bridging and two monoatomic bridging plus syn-syn-bridging of 4-chlorobenzoate ligands to a defective double-cubane Mn III 4 moiety.

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Dinuclear Manganese(III) Complex with a Schiff-base Having a Di-μ-acetato-μ-alkoxido-bridged Core

Cited by 4 publications

References 11 publications

Synthesis, Structural Characterization, Hirschfeld Surface Analysis, Density Functional Theory, and Photocatalytic CO2 Reduction Activity of a New Ca(II) Complex with a Bis-Schiff Base Ligand

Synthesis, Structural Characterization, Hirschfeld Surface Analysis, Density Functional Theory, and Photocatalytic CO2 Reduction Activity of a New Ca(II) Complex with a Bis-Schiff Base Ligand

Mixed-Valent Trinuclear CoIII-CoII-CoIII Complex with 1,3-Bis(5-chlorosalicylideneamino)-2-propanol

Mixed-valent Manganese Complex with a Schiff-base Having a Di-μ<sub>4</sub>-oxido-di-μ<sub>3</sub>-oxido-di-μ<sub>3</sub>-carboxylato-hexa-μ-carboxylato-bridged Mn<sup>II</sup><sub>2</sub>Mn<sup>III</sup><sub>6</sub> Core

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