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

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.

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Synthesis, Characterization and Antifungal Studies of Adducts of p- Ethylphenyldithiocarbonates of Copper(II)

Asian Journal of Chemistry ◽

10.14233/ajchem.2019.22089 ◽

2019 ◽

Vol 31 (8) ◽

pp. 1819-1824

Author(s):

Shivangi Sharma ◽

Renu Sachar ◽

G.D. Bajju ◽

Vikas Sharma

Keyword(s):

Magnetic Susceptibility ◽

Electron Spin Resonance ◽

Room Temperature ◽

Molar Conductance ◽

Octahedral Geometry ◽

Molar Ratio ◽

Spectral Studies ◽

Distorted Octahedral Geometry ◽

Distorted Octahedral ◽

Spin Resonance

A series of adducts of p-ethylphenyldithiocarbonates of copper(II) [(p-C2H5C6H4OCS2)2Cu] with ethyl pyridines and chloro pyridines have been synthesized in 1:2 molar ratio. They were characterized by elemental analysis, magnetic susceptibility and molar conductance measurements, infrared, electronic, electron spin resonance and mass spectroscopy, NMR and thermogravimetric analysis. In addition, antifungal studies of these adducts were also performed. The results revealed that the adducts have 1:2 stoichiometry, non-electrolytic and paramagnetic at room temperature. On the basis of spectral studies, a distorted octahedral geometry is proposed around copper(II) ion. ESR studies depicted elongated axial symmetry of Cu(II)adducts with nitrogen donors. Moreover, the adducts also showed potential antifungal activity against Fusarium oxysporium.

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Synthesis and Characterization of Some Transition Metal Complexes of Arylidene Salicyloyl and Benzoyl Hydrazones

Zeitschrift für Naturforschung B ◽

10.1515/znb-1984-0622 ◽

1984 ◽

Vol 39 (6) ◽

pp. 812-816 ◽

Cited By ~ 6

Author(s):

Y. M. Temerk ◽

S. A. Ibrahim ◽

M. M. Kamal

Keyword(s):

Transition Metal Complexes ◽

Metal Ion ◽

Octahedral Geometry ◽

Molar Conductivity ◽

Synthesis And Characterization ◽

Distorted Octahedral Geometry ◽

Bidentate Ligands ◽

Conductivity Measurements ◽

Distorted Octahedral

AbstractComplexes of arylidene salicyloyl- and benzoyl-hydrazones with the 3d metal ions, Cr(III), Mn(II), Fe(III), Co(II), Ni(II) and Cu(II), have been prepared using 2:1 ligand to metal ion ratio. Characterization of the isolated solids was accomplished by IR and electronic spectra, elemental analysis, and molar conductivity measurements. It is concluded that the two Schiff bases function as neutral bidentate ligands and the complexes formed assume a distorted octahedral geometry.

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

Acta Crystallographica Section E Structure Reports Online ◽

10.1107/s1600536812013050 ◽

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.

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

Zeitschrift für Naturforschung B ◽

10.1515/znb-2012-0302 ◽

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.

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Some Organotellurium(IV) Complexes of 1-Methyl-3-(p-tolylimino)indolin-2-one Schiff Base

Asian Journal of Chemistry ◽

10.14233/ajchem.2021.23159 ◽

2021 ◽

Vol 33 (6) ◽

pp. 1236-1244

Author(s):

Manish Kumar ◽

K.K. Verma ◽

Sapana Garg

Keyword(s):

Schiff Base ◽

Xanthomonas Campestris ◽

Computational Study ◽

Molar Conductance ◽

Bidentate Ligand ◽

Octahedral Geometry ◽

Azomethine Nitrogen ◽

Spectral Studies ◽

Distorted Octahedral Geometry ◽

No Donor

Six new hexa-coordinated organotellurium(IV) complexes of type RTeCl3·NMeIPT and R2TeCl2·NMeIPT (R = 4-hydroxyphenyl, 4-methoxyphenyl or 3-methy-4-hydroxyphenyl; NMeIPT(L) = Schiff base (1-methyl-3-(p-tolylimino)indolin-2-one) derived from condensation of 4-methylisatin and p-toluidine) have been synthesized and characterized by different spectral studies like elemental analyses, molar conductance, infrared, mass spectrometry, 1H NMR, 13C NMR and UV-visible spectroscopy. On the basis of spectroscopic data, it is evident that Schiff base behaves as NO donor bidentate ligand via azomethine nitrogen atom and oxygen atom from carbonyl group for all the tellurium(IV) complexes. The results showed that all the organotellurium(IV) complexes possess distorted octahedral geometry. Geometry of the all organotellurium(IV) complexes was optimized and their theoretical quantum mechanical parameters were calculated. This computational study also suggests octahedral geometry for complexes. The antimicrobial activity of NMeIPT and all the organotellurium(IV) complexes were screened against bacteria i.e. Xanthomonas campestris and Bacillus cereus and fungi i.e. Fusarium oxysporum, Candida albicans and Sclerotinia sclerotium.

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Synthesis, Characterization and Antifungal Activity of Novel Quinazolin-4-one Derivatives Containing 8-Hydroxyquinazoline Ligand and its Various Metal Complexes

E-Journal of Chemistry ◽

10.1155/2009/624150 ◽

2009 ◽

Vol 6 (s1) ◽

pp. S445-S451

Author(s):

R. T. Vashi ◽

S. B. Patel

Keyword(s):

Antifungal Activity ◽

Elemental Analysis ◽

Octahedral Geometry ◽

Spectral Studies ◽

Distorted Octahedral Geometry ◽

Hydroxyl Groups ◽

Tetrahedral Geometry ◽

Distorted Octahedral ◽

Metal Ligand ◽

Methyl Phenyl

Novel ligands containing quinazoline-4-one-8-hydroxyquinoline (QQ) merged moieties were prepared and characterized. For this anthranilic acid and 5-bromoanthranilic acid were converted respectively into 2-chloromethyl–3-(4-methyl phenyl)-3(H)-quinazoline-4-one and 2-chloromethyl–3-(methyl phenyl)-6-bromo-3(H)-quinazoline-4-one. Both these compounds were condensed with 5-amino-8-hydroxyquinoline. The so called resulted compounds were named respectively as 2-[(8-hydroxy-quinolinyl) –5- amino methyl] -3-(4-methylphenyl)- 3(H)- quinazoline -4- one and 2-[(8-hydroxyquinolinyl)-5-aminomethyl] -3(methyl phenyl)-6-bromo-3(H)-quinazoline-4-one. Both the compounds were designated respectively as HL1and HL2ligands. The transition metal (Cu2+, Ni2+, Zn2+, Mn2+and Co2+) complexes of both these ligands were prepared. The ligands and their complexes as case may be were characterized by elemental analysis, spectral studies and number of hydroxyl groups. The stoichiometry of the complexes has been found to be 1:2 (metal: ligand). An octahedral geometry around Co2+, Ni2+and Mn2+, distorted octahedral geometry around Cu2+and tetrahedral geometry of around Zn2+have been proposed. These complexes also been tested for their antifungal activities.

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

Acta Crystallographica Section E Structure Reports Online ◽

10.1107/s1600536807006575 ◽

2007 ◽

Vol 63 (3) ◽

pp. m749-m750 ◽

Cited By ~ 4

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.

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

Acta Crystallographica Section E Structure Reports Online ◽

10.1107/s1600536806017302 ◽

2006 ◽

Vol 62 (7) ◽

pp. m1498-m1500 ◽

Cited By ~ 1

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.

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Syntheses, crystal structures, and characterization of two Mn(II) coordination polymers with bis(4-(1H-imidazol-1-yl)phenyl)methanone ligands

Zeitschrift für Naturforschung B ◽

10.1515/znb-2016-0050 ◽

2016 ◽

Vol 71 (8) ◽

pp. 869-874 ◽

Cited By ~ 15

Author(s):

Gao-Feng Wang ◽

Xiao Zhang ◽

Shu-Wen Sun ◽

Hong Sun ◽

Xia Yang ◽

...

Keyword(s):

Ir Spectroscopy ◽

Single Crystal ◽

Coordination Polymers ◽

Octahedral Geometry ◽

Distorted Octahedral Geometry ◽

X Ray Diffraction ◽

X Ray ◽

Distorted Octahedral ◽

Elemental Analyses

AbstractTwo Mn(II) complexes, {[Mn(BIPMO)2Cl2] · 2(H2O)}n (1) and {[Mn(BIPMO)2(SCN)2] · 2(CH3OH)}n (2) (BIPMO = bis(4-(1H-imidazol-1-yl)phenyl)methanone) with V-shaped BIPMO ligands, were synthesized and characterized by IR spectroscopy and elemental analyses along with their single-crystal X-ray diffraction analyses. The Mn(II) ions in 1 and 2 are both six-coordinated to four nitrogen atoms of four BIPMO ligands and two anions (Cl− for 1, and SCN− for 2) to form a distorted octahedral geometry.

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