Copper(ii) induced oxidative modification and complexation of a schiff base ligand: synthesis, crystal structure, catalytic oxidation of aromatic hydrocarbons and DFT calculation

RSC Advances ◽  
2014 ◽  
Vol 4 (65) ◽  
pp. 34248-34256 ◽  
Author(s):  
Surajit Biswas ◽  
Arpan Dutta ◽  
Malay Dolai ◽  
Mainak Debnath ◽  
Atish Dipankar Jana ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Catalytic Oxidation ◽  
Schiff Base Ligand ◽  
Aromatic Hydrocarbons ◽  
Dft Calculation ◽  
Oxidative Modification ◽  
Oh Groups ◽  
Planar Complex ◽  
Square Planar

A mononuclear square planar complex [CuII(L2f)], formed from a Schiff baseH2Laand Cu2+with the concomitant oxidation of two –CH2OH groups to aldehyde, displayed catalytic oxidation of aromatic hydrocarbons.

scholarly journals New Platinum(II) Complex Containing Asymmetric Tetra Dentate Schiff Base Ligand Synthesis, Characterization and DFT Calculation

2012 ◽  
Vol 9 (4) ◽  
pp. 2114-2118 ◽  
Author(s):  
Alireza Akbari ◽  
Iran Sheikhshoaie ◽  
Lotfali Saghatforoush ◽  
S. Yousof Ebrahimipour ◽  
Zohreh Amiri
Keyword(s):  
Schiff Base ◽  
Schiff Base Ligand ◽  
Dft Calculation ◽  
Structural Parameters ◽  
Platinum Complex ◽  
Molar Conductivity ◽  
Cationic Complex ◽  
Square Planar ◽  
Optimized Geometries ◽  
Good Agreement

The tetra dentate neutral (E)-4-nitro-2-((2-(2-(pyridin-2-yl) ethylthio) ethylimino) methyl) phenol, (pytaO2NSalH), Schiff-base ligand was synthesized using 1-(2-pyridyl)-3-thia-s-aminopentane (pyta) and 5-NO2salicylaldehyde. Then the related square planar Pt (II) cationic complex, [Pt (NSNO)] Cl, was synthesized using PtCl2(SMe2)2as precursor complex. The nature of the pytaO2NSalH and its platinum complex were determined by the elemental analysis, molar conductivity and spectrochemical (IR, UV–vis,1HNMR) techniques. In addition, the fully optimized geometries and vibration frequencies of them together were calculated using the ADF 2009.01 package. Structural parameters are in good agreement with the experimental data. The calculated and experimental results confirmed the suggested structures for the ligand and complex.

Platinum(II) complex with 4-nitro-N-(pyridin-2-ylmethylidene)aniline: synthesis, characterization, crystal structure and antioxidant activity

2020 ◽  
Vol 76 (11) ◽  
pp. 1005-1009
Author(s):  
Mehdi Khalaj ◽  
Abolfazl Olyaei ◽  
Mahdieh Sadeghpour ◽  
Arash Lalegani ◽  
Janusz Lipkowski ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Antioxidant Activity ◽  
Schiff Base ◽  
Schiff Base Ligand ◽  
Chain Structure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Square Planar ◽  
Dpph Method ◽  
Bidentate Schiff Base Ligand

A novel complex has been prepared using the (E)-4-nitro-N-(pyridin-2-ylmethylidene)aniline bidentate Schiff base ligand and PtCl2, namely, dichlorido[(E)-4-nitro-N-(pyridin-2-ylmethylidene)aniline-κ2 N,N′]platinum(II) acetonitrile hemisolvate, [PtCl2(C12H9N3O2)]·0.5CH3CN, 1. According to the X-ray measurements of the crystal structure, the PtII ion adopts a PtCl2N2 square-planar coordination. The coordination of the Schiff base ligand to the PtII ion occurs in a cyclic bidentate fashion, as a result of which a five-membered metallacycle is formed. Furthermore, in the structure of 1, the neutral molecules form a one-dimensional chain structure through C—H...Cl and C—H...O hydrogen bonds. The characterization of the complex was performed via single-crystal X-ray diffraction, IR spectroscopy and elemental analysis, and the antioxidant activity of the complex was evaluated using spectrophotometry by the 1,1-diphenyl-2-picrylhydrazyl (DPPH) method.

Azido{4-bromo-2-[(2-diethylaminoethylimino)methyl]phenolato}nickel(II)

2006 ◽  
Vol 62 (4) ◽  
pp. m851-m853 ◽  
Author(s):  
Zhong-Lu You ◽  
Xiao Han ◽  
Jia Wang ◽  
Shu-Yun Niu
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Schiff Base Ligand ◽  
Asymmetric Unit ◽  
Azide Anion ◽  
Square Planar

The title mononuclear nickel(II) complex, [Ni(C13H18BrN2O)N3], contains two molecules in the asymmetric unit. Each NiII atom is four-coordinated by one phenolate O atom, one imine N atom and one amine N atom from a Schiff base ligand, and by one terminal N atom of an azide anion, forming a square-planar coordination. In the crystal structure, adjacent molecules are linked through C—H...N interactions, forming chains along the a axis.

scholarly journals Synthesis and characterization of mixed nickel thiosemicarbazone complexes

2014 ◽  
Vol 8 (3) ◽  
Author(s):  
Hana Bashir Shawish ◽  
Mohd Jamil Maah ◽  
Siti Nadia Abdul Halim
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Ir Spectroscopy ◽  
Schiff Base Ligand ◽  
Synthesis And Characterization ◽  
Planar Geometry ◽  
Mixed Ligands ◽  
Square Planar ◽  
Thiosemicarbazone Complexes

Three nickel thiosemicarbazone mixed ligands complexes have been synthesized. Complexes with the formula [NiL(PPh3)]Cl, [Ni2L2(Phen)],[Ni2L2(Bpy)] (where L= 2,3,4-trihydroxybenzaldehydethiosemicarbazone, PPh3=Triphenylphosphine, Phen=1,10-phenanthroline, Bpy= 2,2 –Bipyridine)have been characterized by IR spectroscopy, as well as elemental analysis. The structure of [NiL (PPh3)]Cl has been determined by X-raycrystallography. The crystal structure of this complex shows that the Schiff base ligand functions as an N,O,S chelating anion to the phosphine –coordinated nickel(II) atom, which exists as a distorted square – planar geometry.

scholarly journals {4,4′,6,6′-Tetrabromo-2,2′-[(2,2-dimethylpropane-1,3-diyl)bis(nitrilomethanylylidene)]diphenolato}copper(II)

2012 ◽  
Vol 68 (4) ◽  
pp. m392-m392
Author(s):  
Hadi Kargar ◽  
Reza Kia ◽  
Mahbubeh Haghshenas ◽  
Muhammad Nawaz Tahir
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Dihedral Angle ◽  
Schiff Base Ligand ◽  
Title Compound ◽  
Rotation Axis ◽  
Centroid Distance ◽  
Square Planar ◽  
Benzene Rings

In the title compound, [Cu(C19H16Br4N2O2)], the CuIIion and the substituted C atom of the diamine fragment lie on a crystallographic twofold rotation axis. The geometry around the CuIIion is distorted square-planar, which is defined by the N2O2donor atoms of the coordinated Schiff base ligand. The dihedral angle between the symmetry-related substituted benzene rings is 25.33 (14)°. The crystal structure is stabilized by an intermolecular π–π interaction [centroid–centroid distance = 3.8891 (18) Å].

{2,2′-[o-Phenylenebis(nitrilomethylidyne)]diphenolato}manganese(II)

2007 ◽  
Vol 63 (11) ◽  
pp. m2854-m2854 ◽  
Author(s):  
Yin-Qiu Liu ◽  
Xi-Rui Zeng ◽  
Qiu-Yan Luo ◽  
Ya-Ping Xu
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Hydrogen Bonds ◽  
Schiff Base Ligand ◽  
Title Complex ◽  
Planar Geometry ◽  
Square Planar

The title complex, [Mn(C20H14N2O2)], is a mononuclear manganese(II) compound. The manganese(II) ion is four-coordinated in a square-planar geometry by two imine N and two phenolate O atoms from one 2,2′-[o-phenylenebis(nitrilomethylidyne)]diphenolate Schiff base ligand. No strong hydrogen bonds were found in the crystal structure.

scholarly journals Crystal structure and Hirshfeld surfaces analysis of the nickel(II) complex of the Shiff base ligand 6,6′-{(1E,1′E)-[ethane-1,2-diylbis(azanylylidene)]bis(methanylylidene)}bis[2-(trifluoromethoxy)phenol]

2019 ◽  
Vol 75 (3) ◽  
pp. 328-331
Author(s):  
Sibel Demir Kanmazalp ◽  
Seher Meral ◽  
Necmi Dege ◽  
Aysen Alaman Agar ◽  
Igor O. Fritsky
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Schiff Base Ligand ◽  
Hirshfeld Surface ◽  
Title Complex ◽  
Two Dimensional ◽  
Hirshfeld Surfaces ◽  
Square Planar ◽  
Shiff Base ◽  
Hirshfeld Surfaces Analysis

In the title complex, (6,6′-{(1E,1′E)-[ethane-1,2-diylbis(azanylylidene)]bis(methanylylidene)}bis[2-(trifluoromethoxy)phenol]-κ4 O,N,N′,O′)nickel(II), [Ni(C18H12F6N2O4)], the nickel(II) ion has a square-planar coordination sphere, being ligated by two N and two O atoms of the Schiff base ligand 6,6′-{(1E,1′E)-[ethane-1,2-diylbis(azanylylidene)]bis(methanylylidene)}bis[2-(trifluoromethoxy)phenol] (L). Inversion-related molecules are linked by a short Ni...Ni interaction of 3.2945 (6) Å forming a dimer. In the crystal, the dimers stack up the a axis, with a closest Ni...Ni separation of ca 3.791 Å. There are no other significant intermolecular interactions present. However, the Hirshfeld surface analysis and the two-dimensional fingerprint plots indicate that the packing is dominated by H...F/F...H, H...H, O...H/H...O and C...H/H...C contacts.

Hexaaquanickel(II) bis{[N-(2-hydroxybenzylidene)alanylglycinato]cuprate(II)} dodecahydrate

2006 ◽  
Vol 62 (7) ◽  
pp. m1508-m1509
Author(s):  
Bin Xu ◽  
Yan-Yan Zhang ◽  
Wen-Long Liu ◽  
Xiao-Ya Hu
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Schiff Base Ligand ◽  
Title Compound ◽  
Octahedral Geometry ◽  
Water Molecules ◽  
Inversion Center ◽  
Solvent Water ◽  
Square Planar ◽  
Complex Anions

The crystal structure of the title compound, [Ni(H2O)6][Cu(C12H11N2O4)]2·12H2O, consists of CuII complex anions, NiII complex cations and solvent water molecules. The CuII ion is located on a general position and coordinated by a Schiff base ligand with a square-planar CuN2O2 geometry. The NiII ion is located on an inversion center and coordinated by six water molecules in an octahedral geometry.

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