Crystal structure of and solvent effect on tautomeric equilibrium in Schiff base derived from 2-hydroxy-1-naphthaldehyde and methylamine studied by X-ray diffraction, DFT, NMR and IR methods

2009 ◽  
Vol 929 (1-3) ◽  
pp. 32-42 ◽  
Author(s):  
T. Dziembowska ◽  
M. Szafran ◽  
A. Katrusiak ◽  
Z. Rozwadowski
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Solvent Effect ◽  
Tautomeric Equilibrium ◽  
X Ray Diffraction ◽  
X Ray

Synthesis of an Unprecedented H-stitched Binuclear Crystal Structure Based on Selective Fluorescence Recognition of Zn2+ in Newly Synthesized Schiff Base Ligand with DFT and Imaging Application in Living Cells

2021 ◽  
Author(s):  
SOUMYA SUNDAR MATI ◽  
Dr. SAUGATA KONAR ◽  
BOBY SAMAI
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Elemental Analysis ◽  
Schiff Base Ligand ◽  
Binuclear Complex ◽  
Living Cells ◽  
X Ray Diffraction ◽  
Schiff Base Ligands ◽  
X Ray ◽  
Imaging Application

A zinc coordinated rare binuclear complex was synthesised and characterized by elemental analysis and single-crystal X-ray diffraction. Two mononuclear units formed by two Schiff base ligands 2-((2-(pyrimidin-2-yl)hydrazono)methyl)phenol (PHP) coordinated with...

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.

scholarly journals Synthesis, characterization and crystal structure of [Cu2(LH)2]•(ClO4)2. Influence of the weak Cu•••O(perchlorate) interaction on the structure of Cu2N2O2 metallocycle

2014 ◽  
Vol 79 (5) ◽  
pp. 545-556
Author(s):  
Marija Mirkovic ◽  
Nadezda Nikolic ◽  
Dusan Mijin ◽  
Milka Avramov-Ivic ◽  
Agnes Kapor ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Cyclic Voltammetry ◽  
Schiff Base ◽  
Ir Spectroscopy ◽  
Metal Complex ◽  
Aprotic Solvent ◽  
Metal Salt ◽  
Protic Solvent ◽  
X Ray Diffraction ◽  
X Ray

The diimine-dioxime ligand, 4,9-diaza-3,10-diethyl-3,9-dodecadiene-2,11-dione bisoxime (LH2), containing a N4 donor set was prepared by Schiff base condensation of 2-hydroxyimino-3-pentanone and 1,4-diaminobutane in two ways: in protic and in aprotic solvent. Higher yield of (LH2) imine was obtained when the synthesis was carried out using protic solvent (C2H5OH) instead of aprotic benzene (78% and 30%, respectively). Cu(II) metal complex of diimine-dioxime was synthesized in CH3OH from metal salt and LH2 in mole ratio 1:1. The isolated complex was characterized by the elemental analysis, IR spectroscopy and cyclic voltammetry. The structure of [Cu2(LH)2]?(ClO4)2 was determined by the single-crystal X-ray diffraction analysis. Comparison with the structurally related diimine-dioxime Cu(II) complexes revealed the influence of the weak Cu???O(perchlorate) interaction on the geometry of the metallocycle.

Synthesis, Crystal Structure and Electrochemical Property of New Ferrocenyl Schiffbase

2013 ◽  
Vol 448-453 ◽  
pp. 2925-2928
Author(s):  
Yan Lin ◽  
Han Feng Cui ◽  
Hao Fan
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Electrochemical Property ◽  
Redox Process ◽  
Electrochemical Measurements ◽  
X Ray Diffraction ◽  
X Ray ◽  
Schiff Base Compound ◽  
Base Compound

s: A novel Schiff-base compound based on ferrocene I has been synthesized and characterized by X-ray diffraction. Electrochemical measurements exhibit that this new ferrocenyl schiffbase undergoes a reversible one-electron redox process.

Crystal Structure of a Binuclear Copper(II) Complex with μ-Alkoxo and μ-Pyridonato Bridges. Effect of the Dihedral Angle on the Superexchange Interaction

1989 ◽  
Vol 44 (3) ◽  
pp. 307-311 ◽  
Author(s):  
Yuzo Nishida ◽  
Miyuki Masumoto ◽  
Yutaka Mori
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Dihedral Angle ◽  
Schiff Base Ligand ◽  
Superexchange Interaction ◽  
X Ray Diffraction ◽  
Binuclear Copper ◽  
Ferromagnetic Interaction ◽  
X Ray

The crystal structure of the binuclear copper(II) complex. [Cu2(L)(2-pyridonato)] was determined by X-ray diffraction, where H3(L) represents the Schiff base ligand derived from 1,3-diaminopropane-2-ol and acetylacetone. Two copper(II) ions are bridged by alkoxide and 2-pyridonate groups with a Cu-Cu separation of 3.249(2) Å . Ferromagnetic interaction is found to be operating in this complex, which is attributed to the small dihedral angle (121°) between the two planes containing the copper(II) ion.

scholarly journals The synthesis of a Cu(ii) Schiff base complex using a bidentate N2O2 donor ligand: crystal structure, photophysical properties, and antibacterial activities

RSC Advances ◽  
2019 ◽  
Vol 9 (71) ◽  
pp. 41737-41744 ◽  
Author(s):  
Yaning Guo ◽  
Xiaobing Hu ◽  
Xinli Zhang ◽  
Xiaohua Pu ◽  
Yue Wang
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Single Crystal ◽  
Schiff Base Ligand ◽  
Photophysical Properties ◽  
Schiff Base Complex ◽  
Antibacterial Activities ◽  
X Ray Diffraction ◽  
Donor Ligand ◽  
X Ray

Reaction of a symmetric compartmental Schiff base ligand (HL) with copper(ii) salt in 2 : 1 M ratio in methanol gave rise to a mononuclear copper(ii) complex, which was characterized by single crystal X-ray diffraction studies.

Synthesis, Characterisation and Crystal Structure of a Copper(II) Dichromate Complex with the N,N’-Bis(2-pyridylmethylene)butane- 1,4-diamine Schiff Base Ligand

2007 ◽  
Vol 62 (4) ◽  
pp. 495-500 ◽  
Author(s):  
Brajagopal Samanta ◽  
Joy Chakraborty ◽  
Shyamapada Shit ◽  
Stuart R. Batten ◽  
Paul Jensen ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Schiff Base Ligand ◽  
Electrochemical Studies ◽  
X Ray Diffraction ◽  
Monoclinic System ◽  
X Ray ◽  
Cell Parameters ◽  
Oxygen Donor ◽  
Elemental Analyses

The new complex Cu[L1]Cr2O7has been synthesised with the N,N′-bis(2-pyridylmethylene) butane-1,4-diamine Schiff base L1, [NC5H4CH=N(CH2)4N=CHC5H4N], and characterised with elemental analyses and different spectroscopic and electrochemical studies. The structure of the new complex has been established by single crystal X-ray diffraction. The complex crystallises in the monoclinic system with space group P21/c having cell parameters a = 14.7(5), b = 9.22(2), c = 16.2(5) Å , β = 116.9(1)°, and Z = 4. The Cr2O72− unit is bonded through one terminal oxygen donor end to the central Cu(II) chelated by the Schiff base ligand.

Complexes of Zn, Cd and Hg Halides with S and N Polydentate Schiff-Base. Metal Template Effect in the Synthesis of Analogous Oxygenated Base. Crystal Structure of [Zn(btsc)2Cl2] and [Cd(btsc)2Br2]

1991 ◽  
Vol 46 (6) ◽  
pp. 767-774 ◽  
Author(s):  
Pilar Souza ◽  
Luisa Sanz ◽  
Vicente Fernández ◽  
Agueda Arquero ◽  
Enrique Gutierrez ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
X Ray Diffraction ◽  
Template Effect ◽  
Intermolecular Hydrogen Bonds ◽  
X Ray ◽  
H Nmr ◽  
Tetrahedral Environment ◽  
Elemental Analyses ◽  
Chlorine Derivative

Zinc, cadmiun and mercury dihalide react with 4-acetylpyridinthiosemicarbazone (4-aptsc) to give complexes with 1:1 and 2:1 ligand/metal stoichiometric ratios. These metals are effective templates for the Schiff-base condensation of 4-acetylpyridine with semicarbazide to give the complexes [M(4-apsc)X2] and [M(4-apsc)2X2] where M = Zn, Cd or Hg and X = Cl, Br or I. These compounds were characterized by elemental analyses, conductivities measurements, IR and 13C, 1H NMR spectra.The zinc chloride and bromide complexes of benzalthiosemicarbazone (btsc) have been prepared and characterized by X-ray measurements.The compounds Zn(btsc)2Cl2 and Cd(btsc)2Br2 are isostructural and crystallize in the space group P21/n. The crystal structure of the chlorine derivative has been resolved by single-crystal X-ray diffraction. The zinc centre is in a slightly distorted tetrahedral environment. There are intra and intermolecular hydrogen bonds.

Crystal Structure, Antimicrobial Activity and Oxidation Resistance of N,N′-Bis(4-hydroxybenzyidene)azine

2013 ◽  
Vol 634-638 ◽  
pp. 918-921
Author(s):  
Dong Qing Li ◽  
Xu Jian Luo ◽  
Mian Jia Tan
Keyword(s):  
Crystal Structure ◽  
Antimicrobial Activity ◽  
Schiff Base ◽  
Oxidation Resistance ◽  
Rice Blast ◽  
Raw Materials ◽  
Inhibitory Effect ◽  
Damping Off ◽  
X Ray Diffraction ◽  
X Ray

In the paper, N,N′-bis(4-hydroxybenzyidene)azine (BHBYA) has been synthesized by p-hydroxybenzaldehyde and hydrazine as raw materials. The structure was determined by X-ray diffraction. The Schiff base crystallizes is in the monoclinic P21/c space group. The results of antimicrobial activity showed that it has a good inhibition on Cucumber Damping-Off and Rice Blast. The findings of oxidation resistance experiment indicated that it has an excellent inhibitory effect on peroxidation of olein.

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