781642-03-3Relevant articles and documents
The copper(II) complex with two didentate schiff base ligands. The unique rearrangment that proceeds under alcohol vapor in the solid state to construct noninclusion structure
Shibuya, Yuhki,Nabari, Keiko,Kondo, Mitsuru,Yasue, Sachie,Maeda, Kenji,Uchida, Fumio,Kawaguchi, Hiroyuki
, p. 78 - 79 (2008)
The complexation reaction of copper(II) ion and N-(m-hydroxyphenylene) salicylideneaminate (mhsa) in EtOH yields EtOH-inclusion and noninclusion crystalline samples, [Cu(mhsa)2]·2EtOH (1) and [Cu(mhsa) 2] (2), respectively. The amorp
Efficient catalytic reduction of 4-nitrophenol using copper(Ii) complexes with n,o-chelating schiff base ligands
Abdullahi, Muhammad Sabiu,Endot, Nor Azam,Garba, Hassan Wafi,Jamil, Mohamad Shazwan Shah
, (2021/10/05)
The reduction of 4-nitrophenol to 4-aminophenol by sodium borohydride was used as a model to test the catalytic activity of copper(II) complexes containing N,O-chelating Schiff base ligands. In this study, a series of copper(II) complexes containing respective Schiff base ligands, N′-salicylidene-2-aminophenol (1), N′-salicylidene-2-aminothiazole (2), and N,N′-bis(salicylidene)-o-phenylenediamine (3), were synthesized and characterized by elemental analysis, Fourier transform infrared (FT-IR), and UV-Visible (UV-Vis) and electron paramagnetic resonance (EPR) spectroscopies. The results from the 4-nitrophenol reduction showed that 3 has the highest catalytic activities with 97.5% conversion, followed by 2 and 1 with 95.2% and 90.8% conversions, respectively. The optimiza-tion of the catalyst amount revealed that 1.0 mol% of the catalyst was the most optimized amount with the highest conversion compared to the other doses, 0.5 mol% and 1.5 mol%. Recyclability and reproducibility tests confirmed that all three complexes were active, efficient, and possess excellent reproducibility with consistent catalytic performances and could be used again without a major decrease in the catalytic activity.
Synthesis, reactivity and physico-chemical studies of some novel mixed ligand complexes of copper(II)
Dubey,Mishra,Mishra
, p. 1159 - 1164 (2007/10/03)
Some copper(II) complexes having general formula, [(μ-Cl) 2Cu2{η2-(sb)}2] 1,2 and [Cu{η2-(sb)}2] 3, 4, [where sbH = Schiff base, {salicylidene-2-aminophenol (saphH) for 1, 3 and salicylidene-3-nitro-1- aminobenzene (snabH) for 2, 4 have been synthesized by the interactions of anhydrous CuCl2 with sodium salt of corresponding Schiff bases in different molar ratio(s) using THF and benzene as reaction medium. The complexes 1, 2 have been further treated with various sodium salts of phenol, hydroxobenzaldehyde and aluminiumtetraisopropoxide to produce some novel mixed ligand complexes of the types, [(μ-OAr)2Cu2{η 2-(sb)}2] 5, 6, [(η2-OBa) Cu{η2-(sb)}] 7, 8 and [(μ-OPri) 2Al(OPri)2}Cu{η2-(sb)}] 9, 10. All these derivatives have been characterised by elemental analysis, spectral (IR, UV-visible and ESR), magnetic susceptibility measurements and FAB-mass studies. On the basis of these results, a dimeric square planar geometry around copper(II) for the complexes 1, 2, 5 and 6 has been suggested.