188713-26-0Relevant academic research and scientific papers
An asymmetric dinuclear copper(II) complex with phenoxo and acetate bridges: Synthesis, structure and magnetic studies
Dutta, Gorachand,Debnath, Rajib Kumar,Kalita, Apurba,Kumar, Pankaj,Sarma, Moushumi,Shankar, R. Boomi,Mondal, Biplab
, p. 293 - 298 (2011)
The dinuclear (μ2-acetate)bis(μ2-phenoxide)di- copper(II) complex, 1 with a tetradentate ligand, L (L = 2,4-di-tert-butyl-6- {[(2-dimethylaminoethyl)-(2-hydroxybenzyl)-amino]-methyl}-phenol) has been synthesized and characterized. The single crystal X-ray structure of the dinuclear complex was determined. Variable temperature magnetic susceptibility measurement showed that the two copper(II) centres are strongly anti-ferromagnetically coupled. The structural study revealed that the Cu-Cu distance (2.911 ) is very close to the distance observed in dinuclear copper(II) acetate. The average Cu-O-Cu angles (～87°) are found to be the lowest amongst the examples reported so far.
Solvent dependent disproportionation of Cu(II) complexes of N2O2-type ligands: Direct evidence of formation of phenoxyl radical: An experimental and computational study
Debnath, Rajib Kumar,Kalita, Apurba,Sinha, Sourab,Bhattacharyya, Pradip Kr.,Mondal, Biplab,Ganguli, Jatindra Nath
, p. 4490 - 4500 (2015)
Four Cu(II) complexes (1, 2, 3 and 4) with N2O2-type ligand, H2L1, H2L2, H2L3 and H2L4, respectively have been synthesized as the functional model for galactose oxidase. In presence of acetonitrile the Cu(II) centres in the complexes, undergo reduction with simultaneous oxidation of the ligands. The ligand oxidized products are isolated and characterized. Spectroscopic studies indicate that this disproportionation goes through the formation of a Cu(II)-phenoxyl intermediate. The complexes also undergoes the same reaction with pyridine, which indicates the involvement of the exergonic N-donor ligand for the formation of Cu(II)-phenoxyl complex. The Cu(II)-phenoxyl complexes are found to be stable in methanol in presence of a strong base. The paramagnetic centers in the Cu(II)-phenoxyl complexes were found to be weakly ferromagnetically coupled. The complexes, in acetonitrile solvent, have been found to oxidize primary alcohols to corresponding aldehydes. In absence of single crystal structures of the complexes, we optimized the structures using density functional theory (DFT). The UV-visible peaks of complexes as found from time dependent density functional theory (TDDFT) calculations match well with the observed experimental results.
Mononuclear and Mixed-Valence Trinuclear Manganese Complexes Containing Tripodal Tetradentate Ligands. Phenolato, Carboxylato, and Alkoxo Bridges
Hirotsu, Masakazu,Kojima, Masaaki,Yoshikawa, Yuzo
, p. 649 - 657 (2007/10/03)
Manganese complexes containing tripodal tetradentate ligands with an N2O2 donor set (H2L1: N,N-bis(2-hydroxybenzyl)-N′,N′-dimethylethylenediamine, H2L2: N-(3,5-di-t-butyl-2-hydroxybenzyl)-N
