A Schiff base ligand 4-[indol-3-yl]-but-3-en-2-one benzoyl hydrazone (HL), and its four transition metal complexes (ML2,M=Cu(, Ni(, Zn( and Co() have been prepared and characterized by means of elemental analysis, EI-...A Schiff base ligand 4-[indol-3-yl]-but-3-en-2-one benzoyl hydrazone (HL), and its four transition metal complexes (ML2,M=Cu(, Ni(, Zn( and Co() have been prepared and characterized by means of elemental analysis, EI-MS, molar conductivity, IR, UV-Vis and 1H NMR. The results showed that HL as a bidentate ligand coordinated with transition metal ions to form four-coordination complexes. The antibacterial activity was studied by using the filter scraps diffusion method, and the results indicated that the ligand and the complexes had a low bacteriostatic activity against S. Aureu, P. Aeruginosa and E. Coli. The low in vitro antitumor activity of the title complexes was also observed by using MTT method against KB, A2780, Bel7402 and HELF.展开更多
The electronic structures of N,N′ bis[(1 phenyl 3 methyl 5 oxo 4 pyrazolinyl) α furylmethylidyne]ethylendii mine (and o phenylendiimine), and their complexes of transition metals M (M=Ni, Cu, Co, Pd, Pt) have been c...The electronic structures of N,N′ bis[(1 phenyl 3 methyl 5 oxo 4 pyrazolinyl) α furylmethylidyne]ethylendii mine (and o phenylendiimine), and their complexes of transition metals M (M=Ni, Cu, Co, Pd, Pt) have been calculated by B3LYP method of DFT. Their geometries and bonding characters are discussed, and the relationship between their bioactivities and electronic structures are also discussed from the calculated results of electronic populations and frontier orbital energies.展开更多
A Zinc complex [ZnCl2(HL)2] with Schiff base HL derived from rimantadine and salicylaldehyde was synthesized and characterized by elemental analysis, infrared spectra, 1H NMR spectra,molar conductance, ultraviolet and...A Zinc complex [ZnCl2(HL)2] with Schiff base HL derived from rimantadine and salicylaldehyde was synthesized and characterized by elemental analysis, infrared spectra, 1H NMR spectra,molar conductance, ultraviolet and visible spectra, thermal analysis. Its structure was determined by single crystal X-ray diffraction method. The complex, C38H50Cl2N2O2Zn, crystallizes in the orthorhombic system, space group Aba2 with a=1.381 7(3), b=2.275 0(5), c=1.145 0(2) nm, V=3.599(1) nm3, Z=4, Mr=653.79, F(000)=1 496, Dc=1.301 kg·m-3, μ(Mo Kα)=0.866 mm-1. The kinetic parameters were obtained from the analysis of TG curve by integral methods. The functions of thermal decomposition reaction mechanism are: F(α)=[1-(1-α)1/3]2, and kinetic compensation effect equation lnA=0.019 1E-0.142 7. CCDC: 253297.展开更多
Four Schiff bases derived from o vanillin and amino acids have been synthesized and characterized by elemental analysis and IR. The conformations of four Schiff bases have been studied using molecular dynamics and qua...Four Schiff bases derived from o vanillin and amino acids have been synthesized and characterized by elemental analysis and IR. The conformations of four Schiff bases have been studied using molecular dynamics and quantum chemistry analysis approaches. The results revealed that the trans CN with R configuration of the title compounds are more stable than their S configuration and there was a negative charge hole in the Schiff base, which shows the high possibility of forming stable complexe because metal ion is easy to enter this negative charge hole.展开更多
A new ligand N,N′ bis[(1 phenyl 3 methyl 5 oxo 4 pyrazolinyl) 2 thenoylmethylidyne]ethyl enediimine (HPMTHP)\-2en and its five complexes have been sythesized. These complexes have the general formula [M(PMTHP)\-2en],...A new ligand N,N′ bis[(1 phenyl 3 methyl 5 oxo 4 pyrazolinyl) 2 thenoylmethylidyne]ethyl enediimine (HPMTHP)\-2en and its five complexes have been sythesized. These complexes have the general formula [M(PMTHP)\-2en], where M=Cu(Ⅱ), Ni(Ⅱ), Co(Ⅱ), Pd(Ⅱ), Pt(Ⅱ). They were characterized by elemental analysis, IR, UV vis, magnetic moments and molar conductance. The results showed that the complexes are all of quadricoordinate square planar geometry. The antibacterial experiment indicated that they have high antibacterial activities against S. aureus, B. subtillis, E. coli, E. carotovora, C. flaccumfaciens.展开更多
Eight novel binuclear tetradentate Schiff base complexes (M=Cu?,Ni?,Zn?) are synthesized. The structure of complexes is two discrete Schiff base unit bridged. The complexes were condensed from series substituent Keton...Eight novel binuclear tetradentate Schiff base complexes (M=Cu?,Ni?,Zn?) are synthesized. The structure of complexes is two discrete Schiff base unit bridged. The complexes were condensed from series substituent Ketones (5 chloro 2 hydroxybenzophenone, 5 methyl 2 hydroxy benzophenone, 5 Bromo 2 hydroxybenzop henone) and dialdehydes (5,5′ methylene disalicylaldehyde) with the amino group of 1,2 diaminobenzene, and by Metal ion as template. The compounds were characterized by elemental analyses, FT infrared spectra, Raman, 1H NMR, UV vis electronic spectra, EPR spectra. The FT infrared spectra and Raman spectra of complexes were compared and discussed. The UV vis election spectra, 1H NMR and EPR spectra of complexes have also been attributed and minutely analyzed.展开更多
文摘A Schiff base ligand 4-[indol-3-yl]-but-3-en-2-one benzoyl hydrazone (HL), and its four transition metal complexes (ML2,M=Cu(, Ni(, Zn( and Co() have been prepared and characterized by means of elemental analysis, EI-MS, molar conductivity, IR, UV-Vis and 1H NMR. The results showed that HL as a bidentate ligand coordinated with transition metal ions to form four-coordination complexes. The antibacterial activity was studied by using the filter scraps diffusion method, and the results indicated that the ligand and the complexes had a low bacteriostatic activity against S. Aureu, P. Aeruginosa and E. Coli. The low in vitro antitumor activity of the title complexes was also observed by using MTT method against KB, A2780, Bel7402 and HELF.
文摘The electronic structures of N,N′ bis[(1 phenyl 3 methyl 5 oxo 4 pyrazolinyl) α furylmethylidyne]ethylendii mine (and o phenylendiimine), and their complexes of transition metals M (M=Ni, Cu, Co, Pd, Pt) have been calculated by B3LYP method of DFT. Their geometries and bonding characters are discussed, and the relationship between their bioactivities and electronic structures are also discussed from the calculated results of electronic populations and frontier orbital energies.
文摘A Zinc complex [ZnCl2(HL)2] with Schiff base HL derived from rimantadine and salicylaldehyde was synthesized and characterized by elemental analysis, infrared spectra, 1H NMR spectra,molar conductance, ultraviolet and visible spectra, thermal analysis. Its structure was determined by single crystal X-ray diffraction method. The complex, C38H50Cl2N2O2Zn, crystallizes in the orthorhombic system, space group Aba2 with a=1.381 7(3), b=2.275 0(5), c=1.145 0(2) nm, V=3.599(1) nm3, Z=4, Mr=653.79, F(000)=1 496, Dc=1.301 kg·m-3, μ(Mo Kα)=0.866 mm-1. The kinetic parameters were obtained from the analysis of TG curve by integral methods. The functions of thermal decomposition reaction mechanism are: F(α)=[1-(1-α)1/3]2, and kinetic compensation effect equation lnA=0.019 1E-0.142 7. CCDC: 253297.
文摘Four Schiff bases derived from o vanillin and amino acids have been synthesized and characterized by elemental analysis and IR. The conformations of four Schiff bases have been studied using molecular dynamics and quantum chemistry analysis approaches. The results revealed that the trans CN with R configuration of the title compounds are more stable than their S configuration and there was a negative charge hole in the Schiff base, which shows the high possibility of forming stable complexe because metal ion is easy to enter this negative charge hole.
文摘A new ligand N,N′ bis[(1 phenyl 3 methyl 5 oxo 4 pyrazolinyl) 2 thenoylmethylidyne]ethyl enediimine (HPMTHP)\-2en and its five complexes have been sythesized. These complexes have the general formula [M(PMTHP)\-2en], where M=Cu(Ⅱ), Ni(Ⅱ), Co(Ⅱ), Pd(Ⅱ), Pt(Ⅱ). They were characterized by elemental analysis, IR, UV vis, magnetic moments and molar conductance. The results showed that the complexes are all of quadricoordinate square planar geometry. The antibacterial experiment indicated that they have high antibacterial activities against S. aureus, B. subtillis, E. coli, E. carotovora, C. flaccumfaciens.
文摘Eight novel binuclear tetradentate Schiff base complexes (M=Cu?,Ni?,Zn?) are synthesized. The structure of complexes is two discrete Schiff base unit bridged. The complexes were condensed from series substituent Ketones (5 chloro 2 hydroxybenzophenone, 5 methyl 2 hydroxy benzophenone, 5 Bromo 2 hydroxybenzop henone) and dialdehydes (5,5′ methylene disalicylaldehyde) with the amino group of 1,2 diaminobenzene, and by Metal ion as template. The compounds were characterized by elemental analyses, FT infrared spectra, Raman, 1H NMR, UV vis electronic spectra, EPR spectra. The FT infrared spectra and Raman spectra of complexes were compared and discussed. The UV vis election spectra, 1H NMR and EPR spectra of complexes have also been attributed and minutely analyzed.
