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

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.

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.

Two New Copper (II) Complexes with the Same NNO Donor Schiff Base Ligand: A Monomer and a Dimer

2012 ◽  
Vol 67 (3) ◽  
pp. 192-196
Author(s):  
Bao Lin Liu ◽  
Yan Xia Wang ◽  
Ruo Jie Tao
Keyword(s):  
Experimental Data ◽  
Thermal Analysis ◽  
Schiff Base ◽  
Magnetic Measurements ◽  
Octahedral Geometry ◽  
Distorted Octahedral Geometry ◽  
Antiferromagnetic Exchange ◽  
X Ray ◽  
Distorted Octahedral ◽  
Best Fit

Two new copper(II) complexes, [(CuL)2(μ1,1-N3)2]・2H2O (1) and [Cu(HL)(2,2ʹ-bipy)- (CH3COO)]・ClO4・H2O (2), have been synthesized using the tridentate NNO Schiffbase ligand 2- [(2-aminoethylimino)methyl]-6-methoxyphenol (HL). They have been characterized by elemental analysis, IR spectroscopy, thermal analysis, and single-crystal X-ray analysis. The copper environment is distorted square pyramidal in complex 1: two nitrogen atoms and one oxygen atom from the ligands and two nitrogen atoms from two azido ligands build the coordination polyhedron around the copper atom. The Cu-Nazide-Cu angle in complex 1 is 85.6°. This is unusually small in comparison with the same angle in other end-on doubly azido-bridged dimers. Complex 2 is mononuclear with the Cu atom having a slightly distorted octahedral geometry. Magnetic measurements of 1 have been performed in the temperature range from 2 to 300 K. The experimental data indicate an antiferromagnetic exchange interaction between copper(II) ions bridged by the azido ligand. The best-fit parameters for complex 1 are g = 2.18 and J = −1.31 cm−1.

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.

Bis{4-bromo-2-[3-(dimethylamino)propyliminomethyl]phenolato}nickel(II)

2007 ◽  
Vol 63 (3) ◽  
pp. m749-m750 ◽  
Author(s):  
Li-Zhong Li ◽  
Li-Hua Wang
Keyword(s):  
Schiff Base ◽  
Title Compound ◽  
Octahedral Geometry ◽  
Distorted Octahedral Geometry ◽  
Asymmetric Unit ◽  
Schiff Base Ligands ◽  
Distorted Octahedral

The title compound, [Ni(C12H16BrN2O)2], crystallizes with two half-molecules per asymmetric unit; each mononuclear molecule is centrosymmetric. The NiII atom in each molecule, lying on an inversion centre, is six-coordinated in a slightly distorted octahedral geometry by two phenolate O atoms, two imine N atoms and two amine N atoms from two Schiff base ligands.

{2-[2-(Ethylamino)ethyliminomethyl]phenol}{2-[2-(ethylamino)ethyliminomethyl]phenolato}nickel(II) perchlorate

2006 ◽  
Vol 62 (7) ◽  
pp. m1498-m1500 ◽  
Author(s):  
Zhong-Lu You ◽  
Jing-Yun Chi
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Ion Pairs ◽  
Octahedral Geometry ◽  
Distorted Octahedral Geometry ◽  
Asymmetric Unit ◽  
Schiff Base Ligands ◽  
One Dimensional ◽  
Distorted Octahedral ◽  
Anions And Cations

In the title structure, [Ni(C11H15N2O)(C11H16N2O)]ClO4, there are two independent ion pairs in the asymmetric unit. In each cation, the NiII atom is six-coordinated in a slightly distorted octahedral geometry by two phenolate O atoms, two imine N atoms and two amine N atoms from two Schiff base ligands, in one of which the phenolate O atom is protonated. In the crystal structure, anions and cations are linked through intermolecular O—H...O, N—H...O and weak C—H...O hydrogen bonds, forming one-dimensional chains containing hydrogen-bonded cation dimers.

Crystal Structures of Heteronuclear Nickel(II)/Zinc(II) Doubly Oxygen Bridged Schiff-Base Complexes

2003 ◽  
Vol 58 (6) ◽  
pp. 539-542 ◽  
Author(s):  
Ayhan Elmali ◽  
Yalçın Elerman
Keyword(s):  
Schiff Base ◽  
Crystal Structures ◽  
Octahedral Geometry ◽  
Schiff Base Complexes ◽  
Distorted Octahedral Geometry ◽  
Schiff Base Ligands ◽  
Distorted Octahedral ◽  
Oxygen Atoms

{[μ-Bis(5-chlorosalicylidene)-1,3-propanediaminato]nickel(II)}dichlorozinc(II) ·2 dmf (dmf = dimethylformamide) 1 and {[μ-bis(5-bromosalicylidene)-1,3- propanediaminato]nickel(II)}- dichlorozinc(II) ·2 dmf (dmf) 2 were synthesized and their crystal structures determined. In both structures, the Ni(II) ions have a distorted octahedral geometry involving the N2O2 atoms of the Schiff-base ligands and two oxygen atoms of dimethylformamide (dmf) molecules. The coordination around the Zn(II) ions is distorted tetrahedral. The Ni···Zn distances are 3.132(1) Å for 1 and 3.122(1) Å for 2.

Synthesis and Crystal Structure of an Oxovanadium(IV) Complex Containing L-Phenylalanine Schiff Base and 1,10-Phenanthroline

2014 ◽  
Vol 1033-1034 ◽  
pp. 588-591
Author(s):  
Jian Fang Dong ◽  
Bu Qin Jing ◽  
Lian Zhi Li
Keyword(s):  
Schiff Base ◽  
Octahedral Geometry ◽  
Distorted Octahedral Geometry ◽  
Stacking Interactions ◽  
X Ray Diffraction ◽  
Synthesis And Crystal Structure ◽  
Triclinic Crystal System ◽  
X Ray ◽  
Distorted Octahedral ◽  
Group A

A new oxovanadium (IV) complex, [VO(o-van-phe)(phen)] (1) (o-van-phe = Schiff base derived from o-vanillin and L-phenylalanine, phen =1,10-phenanthroline), has been synthesized and characterized by elemental analysis, IR spectra and single crystal X-ray diffraction. The results show that complex 1 belongs to triclinic crystal system, with P-1 space group, a=10.646(2) Å, b=11.089(3) Å, c=14.143(4) Å, α=67.374(4)°, β=79.685(4)°, γ=89.711(4)°, Z=2, V=1512.5(7) Å3, Dc =1.195 mg·m–3, μ=0.366 mm–1, F(000)=562. In the molecular structure, the V(IV) ion is six coordinated to form a distorted octahedral geometry. In the crystal, a dimer is formed by intermolecular hydrogen bonding and π–π stacking interactions.

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 2-Amino-5-chloropyridinium cis-diaquadioxalatochromate(III) sesquihydrate

2012 ◽  
Vol 68 (6) ◽  
pp. m824-m825 ◽  
Author(s):  
Ichraf Chérif ◽  
Jawher Abdelhak ◽  
Mohamed Faouzi Zid ◽  
Ahmed Driss
Keyword(s):  
Rotation Axis ◽  
Three Dimensional ◽  
Octahedral Geometry ◽  
Distorted Octahedral Geometry ◽  
Water Molecules ◽  
Lattice Water ◽  
Compound C ◽  
Hydrogen Bonding Interactions ◽  
Distorted Octahedral ◽  
Independent Lattice

In the crystal structure of the title compound, (C5H6ClN2)[Cr(C2O4)2(H2O)2]·1.5H2O, the CrIII atom adopts a distorted octahedral geometry being coordinated by two O atoms of two cis water molecules and four O atoms from two chelating oxalate dianions. The cis-diaquadioxalatochromate(III) anions, 2-amino-5-chloropyridinium cations and uncoordinated water molecules are linked into a three-dimensional supramolecular array by O—H...O and N—H...O hydrogen-bonding interactions. One of the two independent lattice water molecules is situated on a twofold rotation axis.

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