Infrared spectra of N-aryl salicylaldimine complexes substituted in both aryl rings

Percy, Gordon C.; Thornton, David A.

doi:10.1016/0022-1902(73)80296-9

Cited by 94 publications

(25 citation statements)

References 8 publications

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“…These peaks were observed to be absent in the spectra of free ligands and are in concordance with the values reported by [13]. The peaks of metal-oxygen and metalnitrogen stretching frequencies, in some cases, can be very difficult to observe [14,15].…”

Section: Infrared Spectroscopysupporting

confidence: 78%

Tetradentate Palladium(II) Salophen Complexes: Synthesis, Characterization and Catalytic Activities in Copper-Free Sonogashira Coupling Reaction

Ahmad

Bahron

Tajuddin

2018

IJET

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This paper reports the synthesis and characterization of three salophen ligands; 2,2'- and 2,2'-((1E,1'E)-(1,2-phenylenebis(azanylylidene))bis(methanylylidene))bis(4-methoxylphenol)[L1OME]. The compounds were prepared from condensation reaction between salicylaldehyde, and its derivatives, with orthophenylenediamine. Their palladium(II) complexes, namely PdL1H, PdL1C and PdL1OME were synthesized through insertion reaction between the ligands with palladium(II) acetate. All compounds were characterized through melting point, elemental analysis, i nfrared spectroscopy, 1 H and 13 C NMR spectroscopy. Palladium(II) complexes were tested as homogenous catalysts in copper-free Sonogashira coupling reaction between iodobenzene and phenylacetylene in DMSO using triethylamine as base with 1.0 mmol% catalyst loading. The most performing catalyst was PdL1OME with 91% conversion followed by PdL1H (83%) and PdL1C (27%).

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Section: Infrared Spectroscopysupporting

confidence: 78%

Tetradentate Palladium(II) Salophen Complexes: Synthesis, Characterization and Catalytic Activities in Copper-Free Sonogashira Coupling Reaction

Ahmad

Bahron

Tajuddin

2018

IJET

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“…The C=N stretching frequency at 1,634 cm -1 is in the region 1,590-1,640 cm -1 reported for similar ligands [28,29]. The C-N stretching frequency is reported in the region 1,350-1,410 cm -1 [30]. For the free ligand, this band was observed as a medium band at 1,390 cm -1 .…”

Section: Homogeneous Catalyst Characterizationmentioning

confidence: 68%

Chiral vanadyl salen catalyst immobilized on mesoporous silica as support for asymmetric oxidation of sulfides to sulfoxides

Zid

Khedher

Ghorbel

2010

Reac Kinet Mech Cat

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cThe chiral vanadyl salen complex was immobilized into mesoporous silica by a covalent grafting method using 3-aminopropyltriethoxysilane as a reactive surface modifier. The formation and integrity of the complex have been confirmed by FT-IR, UV-vis and BET measurements and the complex was tested in the asymmetric oxidation of sulfide to sulfoxide using H 2 O 2 as oxidant. The immobilized complex showed better catalytic activity than the neat complex, while the neat complex has deactivated in the reaction. The combination of the heterogenized catalyst, H 2 O 2 and CH 2 Cl 2 as solvent offers a selective catalytic system for oxidation of sulfide to sulfoxide with a low but significant enantioselectivity in the range of 8-10% ee. In addition, the heterogenized catalyst could be easily separated from the products and reused.

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“…The O-H stretching frequency of H 4 L appears at 3373 cm −1 , whereas the Co(II) coordination compound shows a stretching band at 3421 cm −1 , which is attributed to vibrations of the coordinated methanol molecules. For the Co(II) coordination compound, the ν (Co-O) and ν (Co-N) frequencies are observed at 463 and 519 cm −1 , respectively [74,81]. …”

Section: Ir Spectroscopymentioning

confidence: 99%

Unprecedented Hexanuclear Cobalt(II) Nonsymmetrical Salamo-Based Coordination Compound: Synthesis, Crystal Structure, and Photophysical Properties

et al. 2018

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Abstract:A novel hexanuclear Co(II) coordination compound with a nonsymmetrical Salamo-type bisoxime ligandH 4 L, namely [{Co 3 (HL)(MeO)(MeOH) 2 (OAc) 2 } 2 ]·2MeOH, was prepared and characterized by elemental analyses, UV-vis, IR and fluorescence spectra, and X-ray single-crystal diffraction analysis. Each Co(II) is hexacoordinated, and possesses a distorted CoO 6 or CoO 4 N 2 octahedrons. The Co(II) coordination compound possesses a self-assembled infinite 2D supramolecular structure with the help of the intermolecular C-H···O interactions. Meanwhile, the photophysical properties of the Co(II) coordination compound were studied.

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Infrared spectra of N-aryl salicylaldimine complexes substituted in both aryl rings

Cited by 94 publications

References 8 publications

Tetradentate Palladium(II) Salophen Complexes: Synthesis, Characterization and Catalytic Activities in Copper-Free Sonogashira Coupling Reaction

Tetradentate Palladium(II) Salophen Complexes: Synthesis, Characterization and Catalytic Activities in Copper-Free Sonogashira Coupling Reaction

Chiral vanadyl salen catalyst immobilized on mesoporous silica as support for asymmetric oxidation of sulfides to sulfoxides

Unprecedented Hexanuclear Cobalt(II) Nonsymmetrical Salamo-Based Coordination Compound: Synthesis, Crystal Structure, and Photophysical Properties

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