14057-91-1Relevant articles and documents
Solvent dependent ligand transformation in a dinuclear copper(ii) complex of a compartmental Mannich-base ligand: Synthesis, characterization, bio-relevant catalytic promiscuity and magnetic study
Majumder, Ishani,Chakraborty, Prateeti,Das, Sudhanshu,Kara, Hulya,Chattopadhyay, Shymal Kumar,Zangrando, Ennio,Das, Debasis
, p. 51290 - 51301 (2015)
An "end-off" pentadentate compartmental ligand HL has been synthesized by Mannich base condensation using p-cresol and 2-benzyl amino ethanol and structurally characterized. A dinuclear copper(ii) complex, namely [Cu2(L)(μ-OH)(H2O)(C
Formation of a Cu(II)-phenoxyl radical complex from a Cu(II)-phenolate complex: A new model for galactose oxidase
Debnath, Rajib Kumar,Kalita, Apurba,Kumar, Pankaj,Mondal, Biplab,Ganguli, Jatindra Nath
, p. 222 - 227 (2013/04/23)
A new N3O type tetradentate ligand (HL) [2,4-di-tert-butyl-6- ((4-(2-(6,8-di-tert-butyl-2H-benzo[e][1,3]oxazin-3(4H)-yl)ethyl)piperazin-1-yl) methyl)phenol] and its complex [CuL(CH3OH)]ClO4(CH 3OH) have been synthesised. The complex has been crystallographically and spectroscopically characterised. It has been noticed that in the presence of acetonitrile the Cu(II) centers in the complex undergo reduction with a concomitant oxidation of the ligand. EPR and UV-Vis spectroscopic studies of the complex in acetonitrile indicate that this disproportionation proceeds via the formation of a Cu(II)-phenoxyl intermediate. The Cu(II)-phenoxyl complex is found to be stable in methanol in the presence of base. The oxidised products of the ligand are isolated and characterized. The paramagnetic centers in the Cu(II)-phenoxyl complexes were found to be weakly ferromagnetically coupled.
Nitric oxide reduction of copper(II) complex with tetradentate amine ligand followed by ligand transformation
Sarma, Moushumi,Singh, Amardeep,Gupta G., Subrahmanyam,Das, Gopal,Mondal, Biplab
, p. 63 - 70 (2010/04/01)
Copper(II) complex 1 with a tetradentate ligand L [L = tris(2-aminoethyl)amine, tren] has been prepared as its perchlorate salt. Single crystal X-ray structure of 1 indicates its trigonal bipyramidal shape in the solid state. The complex, in dry and degassed acetonitrile solvent, was made to react with nitric oxide gas and the copper(II) center has been observed to reduce to Cu(I) with simultaneous nitrosation followed by diazotization at the terminal primary amine positions of the ligand to result into cyclization product, 1-(2-aminoethyl)piperzine, L′ along with tris(2-aminoethyl)ammonium perchlorate, L′′-perchlorate. However, when an acetonitrile:water (10:1, v/v) mixture has been used as the solvent, the reduction of Cu(II) to Cu(I) is observed and the ligand is found to be precipitated out only as L′′-perchlorate. The reduction of Cu(II) to Cu(I) has been studied by UV-visible, 1H NMR and EPR spectroscopic techniques and by X-ray single crystal structure determination. Both the L′ and L′′-perchlorate have been isolated from the reaction mixture and characterized by using microanalytical studies, various spectroscopic techniques and X-ray single crystal structure determination.
