Different structures of two Cu(I) complexes constructed by bridging 2,2-(1,4-butanediyl)bis-1,3-benzoxazole ligand: Syntheses, structures and properties

Xu, Yuling; Mao, Shanshan; Shen, Kesheng; Shi, Xinkui; Wu, Huilu; Tang, Xia

doi:10.1016/j.ica.2017.10.023

Cited by 23 publications

(9 citation statements)

References 62 publications

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“…The reaction also afforded excellent results in the case of amino alcohol derivatives (Table 2, entry [16][17]. It is worth noting that allylic amine can be transformed to the corresponding product in good yield (Table 2, entry 18).…”

Section: Resultsmentioning

confidence: 84%

“…Under solvent-free conditions only 30 % of desired 2-substituted benzoxazole was detected (Table 1, entry 14). Using the CHCl 3 , EtOAC, and Et 2 O as solvent, the reaction gave the desired product in only moderate yields (Table 1, entries [15][16][17]. Changing the solvent to CH 3 CN slightly increased the yield (Table 1, entry 18), whereas using MeOH, DCE, and DCM highly increased the yield (Table 1, entries [19][20][21].…”

Section: Resultsmentioning

confidence: 99%

“…They have also exhibited excellent coordination ability through a strong σ-donation and poor π-back donation from the metal to form NHC complexes with almost every transition metals. [16] Furthermore, there is a remarkable interest to develop new strategies for the efficient and more applicable synthesis of tion. The procedure is widely applicable to diverse amines, and can provide the heterocyclic products in a scalable fashion, as well.…”

Section: Introductionmentioning

confidence: 99%

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Consecutive Oxidation/Condensation/Cyclization/Aromatization Sequences Catalyzed by Nanostructured Iron(III)‐Porphyrin Complex towards Benzoxazole Derivatives

et al. 2020

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A facile, efficient, and eco‐friendly strategy to access benzoxazole heterocyclic products has been accomplished through oxidation of catechols followed by condensation/cyclization/aromatization sequences. This process is catalyzed by nanostructured iron(III)‐porphyrin complex to form desired benzoxazole derivatives at room temperature under air condition. The procedure is widely applicable to diverse amines, and can provide the heterocyclic products in a scalable fashion, as well. One of the most significant types of oxidizing agents in nature is the iron‐porphyrin complexes (0.1 mol‐%), existing in the structure of hemoglobin. They have benefits such as low toxicity and high oxidation potential for many substrates.

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Section: Resultsmentioning

confidence: 84%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Consecutive Oxidation/Condensation/Cyclization/Aromatization Sequences Catalyzed by Nanostructured Iron(III)‐Porphyrin Complex towards Benzoxazole Derivatives

et al. 2020

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“…Figure 8. As illustrated in Figure 9, the space skeleton of complex 2 adopts a 3D supra-molecular structure by the hydrogen bonding and π•••π stacking interactions [71][72][73]. Note: Cg1 = C12-C13-C13 i -C12 i -C14 i -C14; Cg2 = C14-C15-C16-C16 i -C15 i -C14 i ; DCC = distance between ring centroids; CgI-perp = perpendicular distance of Cg(I) from ring J; CgJ-perp = perpendicular distance of Cg(J) from Ring 1.…”

Section: Crystal Structure Description Of Complexmentioning

confidence: 99%

“…In the structure of complex 2, there is one pairs of intra-molecular C9-H9A•••O6 hydrogen bonding and one significant intermolecular C10-H10B•••O9 hydrogen bonding interactions inFigure 8. As illustrated inFigure 9, the space skeleton of complex 2 adopts a 3D supra-molecular structure by the hydrogen bonding and π•••π stacking interactions[71][72][73].…”

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confidence: 99%

Self-Assembly of 3d-4f ZnII-LnIII (Ln = Ho and Er) Bis(salamo)-Based Complexes: Controlled Syntheses, Structures and Fluorescence Properties

et al. 2018

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Two new hetero-trinuclear 3d-4f complexes [Zn 2 (L)Ho(µ 2-OAc) 2 (OAc)(MeOH)]•CH 2 Cl 2 (1) and [Zn 2 (L)Er(µ 2-OAc) 2 ]OAc (2), derived from a bis(salamo)-based ligand H 4 L, were synthesized and characterized via elemental analyses, IR, UV-Vis, fluorescence spectra and X-ray crystallography. The X-ray crystal structure analyses demonstrated that two µ 2-acetateanions bridge the Zn II and Ln III (Ln = Ho (1) and Er (2)) atoms in a µ 2-fashion forming similar hetero-trinuclear structures, respectively. In complex 1, one methanol molecule as coordinating solvent participates in the coordination, the two Zn II atoms are six-and five-coordinated and have geometries of slightly distorted tetragonal pyramid and octahedron, and the Ho III atom is nine-coordinated and has the geometry of a mono-capped square antiprism. In complex 2, the two Zn II atoms both possess five-coordinated tetragonal pyramid geometries, and the Er III atom is eight-coordinated with a square antiprism geometry. Furthermore, the fluorescence properties of complexes 1 and 2 were determined.

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Two zinc (II) coordination polymers based on aliphatic ether Schiff base: Synthesis, crystal structure, antioxidation and fluorescence

Han

Shi

Huang

et al. 2018

Applied Organom Chemis

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The synthesis of two 1D coordination polymers [Zn2L12]n 1 and [Zn2L22]n 2, based on the H2L1 (bis (salicylidene)‐3‐oxapentane‐1,5‐diamine) and the H2L2 (bis (5‐methylsalicylaldehyde)‐3‐oxapentane‐1,5‐diamine) ligands, have been described and characterized by IR, elemental analysis and X‐ray single crystal analyses. In coordination polymer 1, each Zn2+ ion is five‐coordinated by three oxygen atoms and two nitrogen atoms from deprotonated ligand forming a square pyramidal configuration. It is worth noting that phenolic oxygens of the deprotonated H2L1 adapt monodentate and monoatomic bridging coordinated modes resulting in one‐dimensional linear chain structure in which macro rings alternately connect small rings. The coordination polymer 2 is a four‐coordinated one‐dimensional zigzag chain in which geometric structure around the Zn (II) atom can be described as distorted tetrahedron. The antioxidant activity of the coordination polymers 1–2 and the ligands were determined by superoxide and hydroxyl radical scavenging method in vitro. The results demonstrated that the coordination polymers exhibit more effective antioxidant activity than the ligands. Moreover, compared with emissive bands of the free ligands in the solid state and DMF solvent, the photoluminescent transition of the Zn (II) coordination polymer 1–2 may be attributed to ligand‐to‐ligand charge‐transfer regulated by Zn (II) ion.

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Different structures of two Cu(I) complexes constructed by bridging 2,2-(1,4-butanediyl)bis-1,3-benzoxazole ligand: Syntheses, structures and properties

Cited by 23 publications

References 62 publications

Consecutive Oxidation/Condensation/Cyclization/Aromatization Sequences Catalyzed by Nanostructured Iron(III)‐Porphyrin Complex towards Benzoxazole Derivatives

Consecutive Oxidation/Condensation/Cyclization/Aromatization Sequences Catalyzed by Nanostructured Iron(III)‐Porphyrin Complex towards Benzoxazole Derivatives

Self-Assembly of 3d-4f ZnII-LnIII (Ln = Ho and Er) Bis(salamo)-Based Complexes: Controlled Syntheses, Structures and Fluorescence Properties

Two zinc (II) coordination polymers based on aliphatic ether Schiff base: Synthesis, crystal structure, antioxidation and fluorescence

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