scholarly journals New 5-bromo-2-hydroxybenzaldehyde S-ethylisothiosemicarbazone and its mixed-ligand Cu(II) complex with imidazole: synthesis, characterization and DFT calculation

2013 ◽  
Vol 11 (11) ◽  
pp. 1844-1851 ◽  
Author(s):  
Reza Takjoo ◽  
Alireza Akbari ◽  
Mehdi Ahmadi ◽  
Hadi Rudbari ◽  
Giuseppe Bruno
Keyword(s):  
Schiff Base ◽  
Analytical Data ◽  
Geometry Optimization ◽  
Schiff Base Complex ◽  
Mixed Ligand ◽  
Planar Geometry ◽  
Base Complex ◽  
Physico Chemical ◽  
Square Planar ◽  
Ft Ir

AbstractA new Schiff base ligand of 5-bromo-2-hydroxybenzaldehyde S-ethyl-isothiosemicarbazone (H2L) was synthesized and its mixed-ligand Cu(II) complex was also prepared by reaction of Cu(NO3)2·3H2O with H2L and imidazole. Their structures were fully characterized by elemental analysis, FT-IR, molar conductivity and UV-Vis methods. The analytical data suggest that the metal, H2L and imidazole ratios in the Schiff base complex are 1:1:1. Single crystal diffraction was also used to better understand the molecular structure of the Cu(II) complex. The results of physico-chemical analyses of the Schiff base complex reveal the coordination geometry around the central atom is square planar. The H2L ligand (NNO donor) is coordinated to the metal center as a tridentate bionegatively agent. Another position of the square planar geometry is occupied by the imidazole ligand. Furthermore, computational studies of the new complex were performed by carrying out DFT calculations. Geometry optimization and natural band analysis of the complex is discussed in further detail.

scholarly journals Unsymmetrical Schiff Base Functionalized as Monobasic Tridentate Ligand on Complexation with Some Transition Metal Ions

2012 ◽  
Vol 9 (2) ◽  
pp. 532-544
Author(s):  
Bibhesh K. Singh ◽  
Narendar Bhojak ◽  
Anant Prakash
Keyword(s):  
Schiff Base ◽  
Transition Metal Ions ◽  
Tridentate Ligand ◽  
Planar Geometry ◽  
Physico Chemical ◽  
Square Planar ◽  
Unsymmetrical Schiff Base ◽  
Mm2 Calculations ◽  
Microbial Potential

Cu(II), Co(II), Ni(II) and Mn(II) complexes of Schiff base derived from 2-aminophenol and pyrrole-2- carbaldehyde have been prepared. The complexes are formed by coordination of N and O atoms of the ligand. Their structures were characterized by physico-chemical and spectroscopic methods. Molecular structure of the complexes has been optimized by MM2 calculations and suggests a tetrahedral/ square planar geometry. The bio-efficacy of the ligand and their complexes has been examined against the growth of bacteriain vitroto evaluate their anti-microbial potential.

Observation of an anion⋯anion interaction in a square planar copper(II) Schiff base complex: DFT study and CSD analysis

2019 ◽  
Vol 487 ◽  
pp. 465-472 ◽  
Author(s):  
Samim Khan ◽  
Sumit Roy ◽  
Klaus Harms ◽  
Antonio Bauzá ◽  
Antonio Frontera ◽  
...  
Keyword(s):  
Schiff Base ◽  
Schiff Base Complex ◽  
Dft Study ◽  
Base Complex ◽  
Square Planar ◽  
Anion Interaction

scholarly journals {4,4′-Dichloro-2,2′-[2,2-dimethylpropane-1,3-diylbis(nitrilomethanylylidene)]diphenolato}copper(II)

2012 ◽  
Vol 68 (8) ◽  
pp. m1135-m1135 ◽  
Author(s):  
Hadi Kargar ◽  
Reza Kia ◽  
Fatemeh Ganji ◽  
Valiollah Mirkhani
Keyword(s):  
Schiff Base ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Schiff Base Complex ◽  
Tetradentate Ligand ◽  
Base Complex ◽  
Π Interactions ◽  
Centroid Distance ◽  
Square Planar ◽  
Benzene Rings

In the title Schiff base complex, [Cu(C19H18Cl2N2O2)], the CuIIion is coordinated in a distorted square-planar environment by two N atoms and two O atoms of the tetradentate ligand. The dihedral angle between the benzene rings is 36.86 (14)°. In the crystal, molecules are linked into inversion dimers by pairs of weak C—H...O hydrogen bonds. In addition, π–π [centroid–centroid distance = 3.7279 (16) Å] and weak C—H...π interactions are observed.

Carbonyl compound dependent hydrolysis of mono-condensed Schiff bases: A trinuclear Schiff base complex and a mononuclear mixed-ligand ternary complex of copper(II)

2010 ◽  
Vol 363 (11) ◽  
pp. 2488-2495 ◽  
Author(s):  
Subrata Naiya ◽  
Biswarup Sarkar ◽  
You Song ◽  
Sandra Ianelli ◽  
Michael G.B. Drew ◽  
...  
Keyword(s):  
Schiff Base ◽  
Carbonyl Compound ◽  
Schiff Bases ◽  
Ternary Complex ◽  
Schiff Base Complex ◽  
Mixed Ligand ◽  
Base Complex ◽  
Hydrolysis Of

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

2012 ◽  
Vol 68 (6) ◽  
pp. m753-m753 ◽  
Author(s):  
Hadi Kargar ◽  
Reza Kia ◽  
Muhammad Nawaz Tahir
Keyword(s):  
Schiff Base ◽  
Dihedral Angle ◽  
Title Compound ◽  
Rotation Axis ◽  
Schiff Base Complex ◽  
Asymmetric Unit ◽  
Base Complex ◽  
Square Planar ◽  
Benzene Rings

The asymmetric unit of the title compound, [Ni(C19H16Br4N2O2)], comprises half of a Schiff base complex. The geometry around the NiII atom, located on a twofold rotation axis, is distorted square-planar, which is supported by the N2O2 donor atoms of the coordinated ligand. The dihedral angle between the substituted benzene rings is 23.19 (17)°. In the crystal, a short intermolecular Br...Br [3.6475 (7) Å] interaction is present.

Mononuclear Copper(I) Schiff Base Complex Cu((Cl-NO2-ba)2en)I(CH3CN): Synthesis and Crystal Structure

2021 ◽  
Vol 43 (1) ◽  
pp. 88-88
Author(s):  
Aliakbar Dehno Khalaji Aliakbar Dehno Khalaji ◽  
Michal Dusek Michal Dusek ◽  
Vaclav Eigner and Seyyed Javad Peyghoun Vaclav Eigner and Seyyed Javad Peyghoun
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Title Compound ◽  
Schiff Base Complex ◽  
Acetonitrile Solution ◽  
Orthorhombic Space Group ◽  
Base Complex ◽  
Vis Spectroscopy ◽  
Elemental Analyses ◽  
Ft Ir

New mononuclear copper(I) Schiff base complex Cu((Cl-NO2-ba)2en)I(CH3CN) (1) containing a bidentate Schiff base ligand (Cl-NO2-ba)2en = 2,4-dichloro-5-nitro-benzylidene-1,2-diaminopropane, was prepared in an acetonitrile solution and characterized by elemental analyses (CHN), FT-IR and UV-Vis spectroscopy. Suitable dark-orange single crystals were obtained by slow evaporation of solvent at 5 and#186;C for several days. Crystal structure of the title compound 1 was determined by single-crystal X-ray diffraction. The complex 1 crystallizes in orthorhombic space group Pna21, a = 16.8634 (5) and#197;, b = 8.4460 (5) and#197;, c = 17.4786 (2) and#197;, V = 2489.45 (17) and#197;3 and Z = 4. In addition, the title compound 1 was used as new precursor for the synthesis of copper(II) oxide nanoparticles via solid state thermal decomposition. The as prepared CuO product was characterized by FT-IR, XRD and SEM.

Mononuclear Copper(I) Schiff Base Complex Cu((Cl-NO2-ba)2en)I(CH3CN): Synthesis and Crystal Structure

2021 ◽  
Vol 43 (1) ◽  
pp. 88-88
Author(s):  
Aliakbar Dehno Khalaji Aliakbar Dehno Khalaji ◽  
Michal Dusek Michal Dusek ◽  
Vaclav Eigner and Seyyed Javad Peyghoun Vaclav Eigner and Seyyed Javad Peyghoun
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Title Compound ◽  
Schiff Base Complex ◽  
Acetonitrile Solution ◽  
Orthorhombic Space Group ◽  
Base Complex ◽  
Vis Spectroscopy ◽  
Elemental Analyses ◽  
Ft Ir

New mononuclear copper(I) Schiff base complex Cu((Cl-NO2-ba)2en)I(CH3CN) (1) containing a bidentate Schiff base ligand (Cl-NO2-ba)2en = 2,4-dichloro-5-nitro-benzylidene-1,2-diaminopropane, was prepared in an acetonitrile solution and characterized by elemental analyses (CHN), FT-IR and UV-Vis spectroscopy. Suitable dark-orange single crystals were obtained by slow evaporation of solvent at 5 and#186;C for several days. Crystal structure of the title compound 1 was determined by single-crystal X-ray diffraction. The complex 1 crystallizes in orthorhombic space group Pna21, a = 16.8634 (5) and#197;, b = 8.4460 (5) and#197;, c = 17.4786 (2) and#197;, V = 2489.45 (17) and#197;3 and Z = 4. In addition, the title compound 1 was used as new precursor for the synthesis of copper(II) oxide nanoparticles via solid state thermal decomposition. The as prepared CuO product was characterized by FT-IR, XRD and SEM.

Mononuclear Copper(I) Schiff Base Complex Cu((Cl-NO2-ba)2en)I(CH3CN): Synthesis and Crystal Structure

2021 ◽  
Vol 43 (1) ◽  
pp. 88-88
Author(s):  
Aliakbar Dehno Khalaji Aliakbar Dehno Khalaji ◽  
Michal Dusek Michal Dusek ◽  
Vaclav Eigner and Seyyed Javad Peyghoun Vaclav Eigner and Seyyed Javad Peyghoun
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Title Compound ◽  
Schiff Base Complex ◽  
Acetonitrile Solution ◽  
Orthorhombic Space Group ◽  
Base Complex ◽  
Vis Spectroscopy ◽  
Elemental Analyses ◽  
Ft Ir

New mononuclear copper(I) Schiff base complex Cu((Cl-NO2-ba)2en)I(CH3CN) (1) containing a bidentate Schiff base ligand (Cl-NO2-ba)2en = 2,4-dichloro-5-nitro-benzylidene-1,2-diaminopropane, was prepared in an acetonitrile solution and characterized by elemental analyses (CHN), FT-IR and UV-Vis spectroscopy. Suitable dark-orange single crystals were obtained by slow evaporation of solvent at 5 and#186;C for several days. Crystal structure of the title compound 1 was determined by single-crystal X-ray diffraction. The complex 1 crystallizes in orthorhombic space group Pna21, a = 16.8634 (5) and#197;, b = 8.4460 (5) and#197;, c = 17.4786 (2) and#197;, V = 2489.45 (17) and#197;3 and Z = 4. In addition, the title compound 1 was used as new precursor for the synthesis of copper(II) oxide nanoparticles via solid state thermal decomposition. The as prepared CuO product was characterized by FT-IR, XRD and SEM.

scholarly journals A Ternary Nickel(II) Schiff Base Complex Containing Di-anionic and Neutral Forms of a Dithiocarbazate Schiff Base

Molbank ◽  
10.3390/m1057 ◽  
2019 ◽  
Vol 2019 (2) ◽  
pp. M1057 ◽  
Author(s):  
Yusof ◽  
Nasri ◽  
Ravoof ◽  
Tiekink
Keyword(s):  
Hydrogen Bond ◽  
Schiff Base ◽  
Three Dimensional ◽  
Schiff Base Complex ◽  
Planar Geometry ◽  
Neutral Form ◽  
X Ray ◽  
Niii Complex ◽  
Square Planar ◽  
Supramolecular Chains

The title NiII complex, Ni(L)(LH2) (1), where LH2 is S-2-methybenzyl-β-N-(2-hydroxy-3-methoxybenzylmethylene) dithiocarbazate, was isolated from the reaction of Ni(acetate)2·4H2O and two molar equivalents of LH2. The complex was characterized by elemental analysis, spectroscopy (IR and UV) as well as by a single-crystal X-ray structure determination. The nickel(II) center is coordinated within a cis-NOS2 donor set that defines a square planar geometry. Three donor atoms, i.e., N, O, and S, are provided by a doubly deprotonated S-2-methybenzyl-β-N-(2-hydroxy-3-methoxybenzylmethylene) dithiocarbazate ligand while the fourth donor, i.e., a thione-S, comes from the neutral form of the dithiocarbazate ligand. In the LH2 ligand, an intramolecular hydroxy-O-H…N(imine) hydrogen bond is found. There is also an intra-ligand, charge assisted amine-N-H…O(phenoxide) hydrogen bond. A notable feature of the molecular packing is the formation of supramolecular chains sustained by π…π stacking interactions whereby the interacting rings are the five- and six-membered chelate and methoxybenzene rings. The chains are connected into a three-dimensional architecture by methyl-C-H…O(methoxy), methoxy-C-H…S(ester), and tolyl-C-H…π(tolyl) interactions.

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