Synthesis and Structural Studies of Some Inorganic Polymers of Succinoyl Carboxymethyl Cellulose

The inorganic polymers containing transition metals such as Mn(II), Co(II), Ni(II), Cu(II) and Zn(II) were synthesized by using succinoyl carboxymethyl cellulose (SCMC) in aqueous media. The newly synthesized polymers were characterized by elemental analysis, IR spectroscopy, TG analysis, UV reflectance spectra and magnetic moment. On the basis of these studies, the composition of the polymeric unit was found to be [M(II)L]n, [Mʼ(II)L.2H2O]n, {[Mˮ(II)L.2H2O]n H2O}, where M= Zn(II), Mʼ = Mn(II), Ni(II) and Cu(II) and Mˮ = Co(II), L = SCMC ligand. On the basis of instrumental techniques, it has been found that the [Zn(II)(SCMC)]n inorganic polymer has tetrahedral geometry, whereas {[Cu(II)(SCMC)].2H2O}n has square planar geometry and [Mn(II)(SCMC).2H2O]n, {[Co(II)(SCMC).2H2O)].H2O}n and [Ni(II) (SCMC).2H2O]n have octahedral geometry. The decomposition temperatures of the inorganic polymers have been determined by TGA. The TGA reveal that the Mn(II) polymer of SCMC is highly thermally stable than rest of the polymers and these polymers can be used as thermal resisting materials.

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Synthesis and Characterization of Metallic Gel Complexes Derived from Carboxymethyl Cellulose

Journal of Chemistry ◽

10.1155/2013/820328 ◽

2013 ◽

Vol 2013 ◽

pp. 1-6 ◽

Cited By ~ 5

Author(s):

H. D. Juneja ◽

Manisha Joshi ◽

J. P. Kanfade

Keyword(s):

Thermal Analysis ◽

Ir Spectra ◽

Carboxymethyl Cellulose ◽

Octahedral Geometry ◽

Synthesis And Characterization ◽

Planar Geometry ◽

Tetrahedral Geometry ◽

Square Planar ◽

Thermal Data

The oxaloyl carboxymethyl cellulose (OCMC) complexes of Mn(II), Co(II), Ni(II), Cu(II), and Zn(II) metal ions have been synthesized and the coordination of OCMC in these complexes has been investigated through IR spectra, reflectance spectra, and thermal analysis. On the basis of spectral and thermal data an octahedral geometry was assigned to[Mn(II)OCMC(H2O)2]nand[Co(II)OCMC(H2O)2]n, square planar geometry was assigned to[Cu(II)OCMC]n, and tetrahedral geometry was assigned to[Ni(II)OCMC]nand[Zn(II)OCMC]nMetallic Gel complexes.

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Synthesis, Characterization, and Biological Activity of Mn(II), Fe(II), Co(II), Ni(II), Cu(II), Zn(II), and Cd(II) Complexes of N-Thiophenoyl-N′-Phenylthiocarbohydrazide

Journal of Chemistry ◽

10.1155/2013/721397 ◽

2013 ◽

Vol 2013 ◽

pp. 1-8 ◽

Cited By ~ 1

Author(s):

M. Yadav ◽

Debasis Behera

Keyword(s):

Magnetic Susceptibility ◽

Biological Activity ◽

Octahedral Geometry ◽

Spectral Studies ◽

Planar Geometry ◽

Tetradentate Ligand ◽

Tetrahedral Geometry ◽

Square Planar ◽

Infrared Spectral ◽

Bacteria And Fungi

Mn(II), Fe(II), Co(II), Ni(II), Cu(II), Zn(II), and Cd(II) complex of N-thiophenoyl -N′-phenylthiocarbohydrazide (H2TPTH) have been synthesized and characterized by elemental analysis, magnetic susceptibility measurements, infrared, NMR, electronic, and ESR spectral studies. The complexes were found to have compositions [Mn(H TPTH)2], [Co(TPTH) (H2O)2], [Ni(TPTH) (H2O)2], [Cu(TPTH)], [Zn(H TPTH)], [Cd(H TPTH)2], and [Fe(H TPTH)2(EtOH)]. The magnetic and electronic spectral studies suggest square planar geometry for [Cu(TPTH)], tetrahedral geometry for [Zn(TPTH)] and [Cd(H TPTH)2], and octahedral geometry for rest of the complexes. The infrared spectral studies of the 1 : 1 deprotonated complexes suggest bonding through enolic oxygen, thiolato sulfur, and both the hydrazinic nitrogens. Thus, H2TPTH acts as a binegative tetradentate ligand. H2TPTH and its metal complexes have been screened against several bacteria and fungi.

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Synthesis, characterization and antimicrobial Studies of complexes of some metal ions with 5(2-hydroxy benzylidine) -2-thio ether -1, 3, 4-thiadiazole

Baghdad Science Journal ◽

10.21123/bsj.7.1.585-592 ◽

2010 ◽

Vol 7 (1) ◽

pp. 585-592

Author(s):

Baghdad Science Journal

Keyword(s):

Iron Complex ◽

Octahedral Geometry ◽

Planar Geometry ◽

In Vitro Tests ◽

Conductivity Measurements ◽

Antimicrobial Studies ◽

Square Planar ◽

Escherchia Coli ◽

Complex Display

A new series of Fe (III) , Co (II) , Ni (II) and Cu (II) complexes of the Schiff base, 5 (2-hydroxy benzylidine) -2-thio ether -1, 3, 4-thiadiazole were prepared and characterized .The imine behaves as a bidentate. The nature of bonding and the stereochemistry of the complexes were deduced from metal analyses, infrared, electronic spectra,magnetic susceptibility and conductivity measurements, an octahedral geometry was suggested for all complexes except the copper complex has a square planar geometry .preliminary in vitro tests for antimicrobial activity show that all the prepared compounds except iron complex display good activity to gram positive Staphelococcus aures and gram negative Escherchia coli.

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Syntheses, Characterization and Biological Activity of Coordination Compounds of Propanedioic Acid and its Mixed Ligand Complexes with N,N'-Dihydroxy-2,3-butanediimine

Asian Journal of Chemistry ◽

10.14233/ajchem.2021.23309 ◽

2021 ◽

Vol 33 (8) ◽

pp. 1911-1918

Author(s):

T.O. Aiyelabola ◽

E.O. Akinkunmi ◽

O Osungunna

Keyword(s):

Antimicrobial Activity ◽

Metal Ions ◽

Coordination Compounds ◽

Mixed Ligand Complex ◽

Octahedral Geometry ◽

Mixed Ligand ◽

Mixed Ligand Complexes ◽

Planar Geometry ◽

Acid Complex ◽

Square Planar

The coordination compounds of propanedioic acid with cobalt(II), nickel(II) and copper(II) ions were synthesized using metal:ligand 1:2. In addition to this, mixed ligand complexes using the same metal ions with propanedioic acid as the primary ligand and N,N'-dihydroxy-2,3-butanediimine as the secondary ligand were also synthesized using M:L1:L2 (1:1:1) where L1 = propanedioic acid, L2 = N,N'-dihydroxy-2,3-butanediimine and M = Cu(II), Ni(II) and Cu(II). The synthesized compounds were characterized using FTIR, UV-vis, magnetic susceptibility measurement and percentage metal composition. The ligand and its metal complexes were tested for their cytotoxic and antibacterial activities. Results indicated that a dimeric square planar geometry was assumed by the cobalt(II) and nickel(II) propanedioic acid complexes. Octahedral geometry was proposed for both cobalt(II) and copper(II) mixed ligand complexes. A dinuclear square pyramidal geometry was suggested for the copper(II) propanedioic acid complex and square planar/octahedral geometry for the nickel(II) mixed ligand complex. The copper(II) propanedioic acid complex elicited the best cytotoxic activity. On the other hand, the nickel(II) propanedioic acid complex showed the remarkable antimicrobial activity. The compounds exhibited good antimicrobial activity in most of the cases with the exception of the cobalt(II) propanedioic acid complex. It was concluded that coordination of the ligands to the metal ions lowered the toxicity of the ligands. It was further concluded that the antimicrobial activity of the compounds was partly dependent on the synergism/additive effect of the intrinsic therapeutic properties of the metal ion and the ligands within the coordination sphere of the complexes synthesized. And this is also in part a function of the geometry assumed by the complexes.

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Structures of Pt(0)P3, Pt(0)P4 and Pt(II)P4 – Distortion isomers

Main Group Metal Chemistry ◽

10.1515/mgmc-2020-0013 ◽

2020 ◽

Vol 43 (1) ◽

pp. 111-116

Author(s):

Milan Melník ◽

Peter Mikuš

Keyword(s):

Structural Parameters ◽

Donor Ligands ◽

Planar Geometry ◽

Bidentate Ligands ◽

Tetrahedral Geometry ◽

Cooperative Effects ◽

Square Planar ◽

Crystal Class ◽

Planar Geometries

AbstractIn this review are analyzed and classified crystallographic and structural parameters of P(0)P3, Pt(0) P4 and Pt(II)P4 derivatives – distortion isomers. Some of the isomers are differing not only by degree of distortion but also by crystal class. There are three types of organo-phosphines which build up the respective geometry about the platinum atoms. In Pt(0)P3 a distorted trigonal planar geometry is build up by three monodentate PPh3 ligands. In Pt(0)P4 a tetrahedral geometry with various degree of distortion is build up by a pair of homo-bidentate ligands. In Pt(II)P4 isomers a square-planar geometries with various degree of distortion are build up by bidentate-P,P’donor ligands, (except one example of isomers, where a tetradentate is involved). The bidentate-P,P’-donor ligands form: four-(PNP,PCP), five-(PC2P) and six-(PC3P) metallocyclic rings. The tetradentate forms five-(PC2P). There are some cooperative effects between Pt–P bond distances and the metallocyclic rings, and at the same time a distortion of the respective geometry increases.

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Synthesis and Optical Studies of the 3,4-dimethoxy Benzaldehyde [5-(2-hydroxyphenyl)-1,3,4-oxadiazol-2-yl]Hydrazone Metal Complexes

10.32792/utq/utjsci/vol7/2/22 ◽

2020 ◽

pp. 95-100

Keyword(s):

Optical Absorption ◽

Absorption Coefficient ◽

Metal Complexes ◽

Mass Spectra ◽

Energy Gap ◽

Planar Geometry ◽

Optical Absorption Spectra ◽

Optical Studies ◽

Tetrahedral Geometry ◽

Square Planar

The aim of the present study is to synthesize and optical studies of 3,4-dimethoxy benzaldehyde [5-(2-hydroxyphenyl)-1,3,4-oxadiazol-2-yl]hydrazone metal complexes. Firstly, the 3,4-dimethoxybenzaldehyde [5-(2-hydroxyphenyl)-1,3,4-oxadiazol-2-yl] hydra zone was synthesized by the reaction of the 2-(5-hydrazino-1,3,4-oxadiazol-2-yl)phenol with 2,3-dimethoxybenzaldehyde in the ethanol as a solvent . Scondly, its complexes of Cr(III), Fe(III), Co(II) and Ni (II) have been synthesized. The synthesized coumpounds and its metal complexes were characterized by the FTIR, Mass spectra and UV-vis absorption. The results confirmed the suggested square planar geometry of the Ni (II) complex and tetrahedral geometry of the Co(II) complex, while Cr (III), Fe(III) complexes were assigned octahedral geometrics. The optical absorption spectra of those complexes in the wavelength range from 200-900 nm were studied.The results showed that the optical absorption is due to indirect allowed transitions of the compound and its complexes, the energy gap (Eg) of these compounds decreases in the order L> Ni (II)> Fe(III)> Co(II) and > Cr(III), the absorption coefficient (α), real and imaginary parts (ɛr,ɛi), and optical conductivity (σopt)were estimated.

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Synthesis, Characterization, and Magnetic and Thermal Studies on Some Metal(II) Thiophenyl Schiff Base Complexes

International Journal of Inorganic Chemistry ◽

10.1155/2011/650186 ◽

2011 ◽

Vol 2011 ◽

pp. 1-7 ◽

Cited By ~ 9

Author(s):

Aderoju Amoke Osowole

Keyword(s):

Schiff Base ◽

Elemental Analysis ◽

Thermal Studies ◽

Schiff Base Complexes ◽

Magnetic Data ◽

Planar Geometry ◽

Tetrahedral Geometry ◽

H Nmr ◽

Square Planar

4-(Thiophen-3-yl)-aniline undergoes condensation with o-vanillin to form an ONS donor Schiff base, 2-methoxy-6-[(4-thiophene-3-yl-phenylimino)-methyl]-phenol, which forms complexes of the type [ML2]xH2O (where M = Mn, Co, Ni, Cu, Zn, Pd). These complexes are characterized by elemental analysis, 1H nmr, electronic, mass, and IR spectroscopies and conductance measurements. The electronic, IR and CHN data are supportive of a 4-coordinate tetrahedral geometry for Mn(II), Co(II), Ni(II), and Zn(II) complexes and square-planar geometry for Cu(II) and Pd(II) complexes, with the chromophores N2O2. The magnetic data reveals that the complexes are magnetically dilute and mononuclear with exception of the Cu(II) complex, which exhibits some anti-ferromagnetisms. The complexes are air-stable solids, and none is an electrolyte in nitro methane.

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Crystal structure of a heterometallic coordination polymer: poly[diaquabis(μ7-benzene-1,3,5-tricarboxylato)dicalcium(II)copper(II)]

Acta Crystallographica Section E Crystallographic Communications ◽

10.1107/s205698901700665x ◽

2017 ◽

Vol 73 (6) ◽

pp. 835-837

Author(s):

Feng Zhang ◽

Bing-Guang Zhang

Keyword(s):

Coordination Polymer ◽

Octahedral Geometry ◽

Title Complex ◽

Distorted Octahedral Geometry ◽

Planar Geometry ◽

Water Molecules ◽

Centroid Distance ◽

Square Planar ◽

Distorted Octahedral ◽

Benzene Rings

In the title complex, [Ca2Cu(C9H3O6)2(H2O)2]n, the CaIIand CuIIcations are bridged by the benzene-1,3,5-tricarboxylate anions (BTC3−) to form the coordination polymer, in which each BTC3−anion bridges two CuIIand five CaIIcations with a μ7coordination mode. The CuIIcation, located at an inversion centre, is in a nearly square-planar geometry defined by four O atoms from four bridging BTC3−anions, while the CaIIcation is in a distorted octahedral geometry defined by five O atoms from bridging BTC3−anions and one water molecule. O—H...O hydrogen bonds between coordinating water molecules and carboxyl groups further stabilize the structure; π–π stacking is also observed between parallel benzene rings, the centroid-to-centroid distance being 3.357 (2) Å.

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Ni(II), Pd(II) and Pt(II) complexes with ligand containing thiosemicarbazone and semicarbazone moiety: Synthesis, characterization and biological investigation

Journal of the Serbian Chemical Society ◽

10.2298/jsc0807727c ◽

2008 ◽

Vol 73 (7) ◽

pp. 727-734 ◽

Cited By ~ 18

Author(s):

Sulekh Chandra ◽

Monika Tyagi

Keyword(s):

Chelating Agents ◽

Fungal Species ◽

Molar Conductance ◽

Octahedral Geometry ◽

Spectral Studies ◽

Planar Geometry ◽

Biological Investigation ◽

Square Planar ◽

New Compounds

The synthesis of nickel(II), palladium(II) and platinum(II) complexes with thiosemicarbazone and semicarbazone of p-tolualdehyde are reported. All the new compounds were characterized by elemental analysis, molar conductance measurements, magnetic susceptibility measurements, mass, 1H-NMR, IR and electronic spectral studies. Based on the molar conductance measurements in DMSO, the complexes may be formulated as [Ni(L)2Cl2] and [M(L)2]Cl2 (where M = Pd(II) and Pt(II)) due to their non-electrolytic and 1:2 electrolytic nature, respectively. The spectral data are consistent with an octahedral geometry around Ni(II) and a square planar geometry for Pd(II) and Pt(II), in which the ligands act as bidentate chelating agents, coordinated through the nitrogen and sulphur/oxygen atoms. The ligands and their metal complexes were screened in vitro against fungal species Alternaria alternata, Aspergillus niger and Fusarium odum, using the food poison technique. .

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Structural investigation of mMNi(II) complex isomers using transmission XAFS: the significance of model development

Journal of Synchrotron Radiation ◽

10.1107/s1600577515014976 ◽

2015 ◽

Vol 22 (6) ◽

pp. 1475-1491 ◽

Cited By ~ 5

Author(s):

M. Tauhidul Islam ◽

Christopher T. Chantler ◽

Mun Hon Cheah ◽

Lachlan J. Tantau ◽

Chanh Q. Tran ◽

...

Keyword(s):

Structural Investigation ◽

Structural Information ◽

Model Development ◽

Planar Geometry ◽

Hybrid Technique ◽

Structural Refinement ◽

Tetrahedral Geometry ◽

Data Set ◽

Propagation Of Uncertainty ◽

Square Planar

High-accuracy transmission XAFS determined using the hybrid technique has been used to refine the geometries of bis(N-n-propyl-salicylaldiminato) nickel(II) (n-pr Ni) and bis(N-i-propyl-salicylaldiminato) nickel(II) (i-pr Ni) complexes which have approximately square planar and tetrahedral metal coordination. Multiple-scattering formalisms embedded inFEFFwere used for XAFS modelling of the complexes. Here it is shown that anIFEFFIT-like package using weighting from experimental uncertainty converges to a well defined XAFS model. Structural refinement of (i-pr Ni) was found to yield a distorted tetrahedral geometry providing an excellent fit, χr2= 2.94. The structure of (n-pr Ni) is best modelled with a distorted square planar geometry, χr2= 3.27. This study demonstrates the insight that can be obtained from the propagation of uncertainty in XAFS analysis and the consequent confidence which can be obtained in hypothesis testing and in analysis of alternate structuresab initio. It also demonstrates the limitations of this (or any other) data set by defining the point at which signal becomes embedded in noise or amplified uncertainty, and hence can justify the use of a particulark-range for one data set or a different range for another. It is demonstrated that, with careful attention to data collection, including the correction of systematic errors with statistical analysis of uncertainty (the hybrid method), it is possible to obtain reliable structural information from dilute solutions using transmission XAFS data.

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