scholarly journals Tridentate hydrazido-hydrazones vanadium complexes. Synthesis, properties and biological activity

2019 ◽  
Vol 4 (1) ◽  
pp. 9-20 ◽  
Author(s):  
Janusz Szklarzewicz ◽  
Anna Jurowska ◽  
Maciej Hodorowicz ◽  
Dariusz Matoga ◽  
Ryszard Gryboś ◽  
...  
Keyword(s):  
Schiff Base ◽  
Schiff Base Ligand ◽  
Distorted Octahedral Geometry ◽  
Vanadium Complexes ◽  
Equatorial Position ◽  
Acceptor Center ◽  
Distorted Octahedral ◽  
Elemental Analyses ◽  
Synthesis Properties ◽  
Tridentate Schiff Base

Nine new vanadium complexes, with tridentate Schiff base ligand based on 3,5-di-tert-butyl-2-hydroxybenzaldehyde and different hydrazides, are described and characterized. The X-ray crystal structure of complex 8 shows distorted octahedral geometry of vanadium, with ONO ligand in equatorial position. The tridentate Schiff base ligand forms six membered and five-membered chelate rings at the V(V) acceptor center, with the corresponding bite angles being 82.97(9)˚ and 74.48(9)˚. The molecules are gathered by means of intermolecular O-H∙∙∙N hydrogen bond and layered by π∙∙∙π interactions involving the pyridine and phenolate rings. Such interactions expand the structure along the crystallographic a axis. The complexes were characterized by the elemental analyses, IR, UV-Vis, EPR spectroscopy, cyclic voltammetry, thermogravimetry and magnetic susceptibility measurements. The stabilization role of co-ligands is discussed. The cytotoxicity versus HepG2 hepatocytes and inhibition of human recombinant PTP1B was studied.

scholarly journals Aqua(2,2′-bipyridine-κ2N,N′){(E)-[(5-chloro-2-oxidobenzylidene)amino-κ2N,O]methanesulfonato-κO}zinc

2012 ◽  
Vol 68 (4) ◽  
pp. m517-m517
Author(s):  
Yi-Fang Deng ◽  
Xue Nie ◽  
Chun-Hua Zhang
Keyword(s):  
Hydrogen Bond ◽  
Schiff Base ◽  
Hydrogen Bonds ◽  
Water Molecule ◽  
Schiff Base Ligand ◽  
Octahedral Geometry ◽  
Distorted Octahedral Geometry ◽  
Complex Molecules ◽  
Distorted Octahedral ◽  
Tridentate Schiff Base

In the title compound, [Zn(C8H6ClNO4S)(C10H8N2)(H2O)], the ZnIIatom is six-coordinated by two O atoms and one N atom from a tridentate Schiff base ligand and two N atoms from a chelating 2,2′-bipyridine ligand and one water molecule, forming a slightly distorted octahedral geometry. In the crystal, O—H...O hydrogen bonds link pairs of complex molecules into dimers. An intramolecular O—H...O hydrogen bond is also present.

Chelates of nickel(II) and copper(II) with tridentate Schiff base formed by the condensation of S-benzyldithiocarbazate with benzoin

1978 ◽  
Vol 56 (15) ◽  
pp. 2000-2002 ◽  
Author(s):  
M. T. H. Tarafder ◽  
M. Akbar Ali
Keyword(s):  
Schiff Base ◽  
Spectral Data ◽  
General Formula ◽  
Schiff Base Ligand ◽  
Nickel Complexes ◽  
Planar Structure ◽  
Spectral Studies ◽  
Square Planar ◽  
Elemental Analyses ◽  
Tridentate Schiff Base

New complexes with the Schiff base ligand derived from S-benzyldithiocarbazate (NH2—NH—CSSCH2C6H5) have been prepared and characterized by elemental analyses, magnetic, conductometric, ir, and electronic spectral studies. The tridentate ONS Schiff base S-benzyl-β-N-(phenyl, phenylhydroxymethyl)methylenedithiocarbazate gave mono-ligand complexes with Ni(II) and Cu(II) having the general formula [MligandX] (M = Ni(II) and Cu(II); X = NO3, Cl, Br, NCS). A proposed square-planar structure for the nickel complexes is supported by magnetic and spectral data. A square-planar structure is also suggested for Cu(II) complexes. The ir results give evidence of the different bondings present in the complexes.

scholarly journals Molybdenum(VI) Complexes with Schiff Base Containing N-Hetero Atom

2020 ◽  
Vol 10 (1) ◽  
pp. 1816-1824
Keyword(s):  
Schiff Base ◽  
Octahedral Geometry ◽  
Molar Conductivity ◽  
Spectral Studies ◽  
Distorted Octahedral Geometry ◽  
Tetradentate Ligand ◽  
Molybdenum Complex ◽  
Molybdenum Complexes ◽  
Distorted Octahedral ◽  
Elemental Analyses

Parent dioxomolybdenum(VI) complex formation by the reaction of MoO2(acac)2 with Schiff base tetradentate ligand, described in this paper. Schiff base tetradentate ligand [H2NCH2CH2 N=CC4H3S-CC4H3S=NCH2CH2NH2] obtained from the condensation of di-2-thienylethanedione with 1,2-diaminoethane. Macrocyclic molybdenum complexes were obtained from the cyclization of a synthesized complex with different 1,3 – diketones. The general formula of parent molybdenum complex is given as [MoO2( H2NCH2CH2 N=CC4H3S – CC4H3S=N CH2CH2NH2)](acac)2 and for macrocyclic molybdenum complex is [MoO2{(CH2CH2 N=CC4H3S – CC4H3S=N CH2CH2) N=C(R)CH2C(R’)=N}](acac)2. Ligand and all molybdenum complexes were characterized by elemental analyses(EA), molar conductivity(ΛM), ultraviolet(UV-Vis), and infrared (IR) spectral studies. The distorted octahedral geometry of element Mo in the parent as well as in macrocyclic molybdenum complexes is completed by two oxo O-atoms, four N-atoms from derived Schiff ligand.

XAFS study of tridentate Schiff base Ni(II) complexes having distorted octahedral geometry

2020 ◽  
Vol 175 ◽  
pp. 108066
Author(s):  
A. Gaur ◽  
S.K. Joshi ◽  
N. Nitin Nair ◽  
B.D. Shrivastava ◽  
R.N. Patel ◽  
...  
Keyword(s):  
Schiff Base ◽  
Octahedral Geometry ◽  
Distorted Octahedral Geometry ◽  
Distorted Octahedral ◽  
Tridentate Schiff Base

Crystal structure and photoluminescence properties of a new CdIIcoordination polymercatena-poly[bis[4-bromo-2-({[2-(pyrrolidin-1-yl)ethyl]imino}methyl)phenolato-κ3N,N′,O]di-μ3-chlorido-di-μ2-chlorido-bis(methanol-κO)tricadmium(II)]

2016 ◽  
Vol 72 (5) ◽  
pp. 426-431 ◽  
Author(s):  
Yasemin Yahsi ◽  
Hatice Ozbek ◽  
Muhittin Aygun ◽  
Hulya Kara
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Schiff Base Complex ◽  
Photoluminescence Properties ◽  
X Ray Diffraction ◽  
One Dimensional ◽  
Distorted Octahedral ◽  
Elemental Analyses ◽  
Schiff Base Metal Complexes ◽  
Tridentate Schiff Base

Schiff base–metal complexes have been used widely as catalysts for many organic reactions, such as ring-opening polymerization and oxidation. In view of the importance of CdIIcoordination polymers and in an effort to enlarge the library of such complexes, the title novel polymeric CdIItridentate Schiff base complex, [Cd3(C13H16BrN2O)2Cl4(CH4O)2]n, has been synthesized and characterized by elemental analyses, UV and IR spectroscopies, and single-crystal X-ray diffraction. The complex crystallizes in the triclinicP\overline{1} space group with two symmetry-independent CdIIatoms, one of which lies on an inversion centre, and analysis of the crystal structure shows that both CdIIatoms are six-coordinated; the environment around one CdIIatom can be described as distorted octahedral, while that around the second CdIIatom is octahedral. The CdIIatoms are linked by chloride ligands to form a one-dimensional coordination polymer. The nonbonding intermolecular Cd...Cd distances are 3.7009 (4) and 4.3563 (5) Å. Furthermore, the photoluminescence properties of the complex have been investigated and it displays a strong red emission in the solid state at room temperature.

The one-dimensional chain compound n-butyldichloro[2-oxido-1-naphthaldehyde (4-pyridylcarbonyl)hydrazonato]tin(IV) methanol disolvate

2006 ◽  
Vol 62 (4) ◽  
pp. m925-m927
Author(s):  
Shao-Wen Chen ◽  
Han-Dong Yin
Keyword(s):  
Schiff Base ◽  
Octahedral Geometry ◽  
Title Complex ◽  
Distorted Octahedral Geometry ◽  
Dimensional Chain ◽  
One Dimensional ◽  
Distorted Octahedral ◽  
The One ◽  
Tridentate Schiff Base ◽  
Chain Compound

In the title complex, [Sn(C4H9)(C17H11N3O2)Cl2]·2CH4O, the Sn atom is in a distorted octahedral geometry, with Sn—O distances of 2.093 (3) and 2.125 (3) Å. The tridentate Schiff base coordinates to the Sn via the azomethine N atom, the hydroxyl O atom and the carbonyl O atom. The complex is stabilized by intramolecular O—H...O hydrogen bonds, forming a one-dimensional chain.

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