scholarly journals Synthesis and Characterization of the Adducts of Bis(O-ethyldithiocarbonato)copper(II) with Substituted Pyridines

2013 ◽  
Vol 2013 ◽  
pp. 1-4
Author(s):  
Gurpreet Kour ◽  
Inderjeet Kour ◽  
Renu Sachar
Keyword(s):  
Unpaired Electron ◽  
Room Temperature ◽  
Magnetic Moments ◽  
Electronic Spectroscopy ◽  
Synthesis And Characterization ◽  
Conductivity Measurements ◽  
Pyramidal Geometry ◽  
Substituted Pyridines ◽  
Square Pyramidal Geometry

Monomeric five coordinated adducts of bis(O-ethyldithiocarbonato)copper(II) of general formula [Cu(C2H5OCS2)2(L)], [L = 2-, 3-, 4-methylpyridines and 2-, 3-, 4-ethylpyridines] have been synthesized and characterized by elemental analysis, i.r. and electronic spectroscopy, magnetic and conductivity measurements. Analytical results show that the adducts have 1 : 1 stoichiometry. The adducts were found to be paramagnetic and their magnetic moments at room temperature lie within the 1.81–1.94 B.M. range and this indicates the presence of one unpaired electron. All the adducts have distorted square pyramidal geometry.

Coordination Compounds of Some 3d-Transition Metal Ions with N1-[4-(4-bromo-phenylsulfonyl)-benzoyl]-N4-(4-methoxyphenyl)- thiosemicarbazide

2008 ◽  
Vol 59 (7) ◽  
Author(s):  
Madalina Angelusiu ◽  
Maria Negoiu ◽  
Stefania-Felicia Barbuceanu ◽  
Tudor Rosu
Keyword(s):  
Coordination Compounds ◽  
Magnetic Moments ◽  
Thermo Gravimetric Analysis ◽  
Electronic Spectroscopy ◽  
Transition Metal Ions ◽  
Synthesis And Characterization ◽  
Gravimetric Analysis ◽  
Thermo Gravimetric ◽  
New Compounds

The paper presents the synthesis and characterization of Cu(II), Co(II), Ni(II), Cd(II), Zn(II) and Hg(II) complexes with N1-[4-(4-bromo-phenylsulfonyl)-benzoyl]-N4-(4-methoxyphenyl)-thiosemicarbazide. The new compounds were characterized by IR, EPR, electronic spectroscopy, magnetic moments, thermo-gravimetric analysis and elemental analysis.

Synthesis and characterization of durene-capped porphyrins and the crystal structure of a hemin derivative

1986 ◽  
Vol 64 (1) ◽  
pp. 208-212 ◽  
Author(s):  
Shantha David ◽  
David Dolphin ◽  
Brian R. James ◽  
John B. Paine III ◽  
Tilak P. Wijesekera ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Phenyl Group ◽  
The Other ◽  
Synthesis And Characterization ◽  
X Ray ◽  
Hydrophobic Cavity ◽  
Pyramidal Geometry ◽  
Porphyrin Core ◽  
Square Pyramidal Geometry

Sterically hindered porphyrins having a fully hydrophobic cavity have been prepared. The cavity is capped with a 2,3,5,6-tetramethylbenzene moiety containing at the 1,4-positions methylene —(CH2)n— chains (n = 4, 5, 7) bonded at trans pyrrole rings of a porphyrin that is alkylated with methyl or ethyl groups at the other β-pyrrolic positions. The iron(III) chloride derivative of the 4,4-durene-capped base has been obtained as single crystals, and subjected to X-ray structural analysis. The typical high spin, square pyramidal geometry of five-coordinate hemin chlorides is maintained; the porphyrin core is strongly distorted and there is no interaction between the phenyl group of the strap and the iron.

Synthesis and Characterization of Silver(I) and Gold(I) Complexes Bearing a Pyrido-annelated N-Heterocyclic Carbene: A Rare Example of a Cocrystal Containing Two Different Gold(I) Complexes

2014 ◽  
Vol 69 (11-12) ◽  
pp. 1188-1198 ◽  
Author(s):  
Margit Kriechbaum ◽  
Daniela Otte ◽  
Manuela List ◽  
Uwe Monkowius
Keyword(s):  
Mass Spectrometry ◽  
Nmr Spectroscopy ◽  
Aromatic Compound ◽  
Elemental Analysis ◽  
Room Temperature ◽  
Electronic Spectroscopy ◽  
Crystalline Material ◽  
Synthesis And Characterization ◽  
Aurophilic Interactions

Abstract The cyclohexyl-substituted imidazo[1,5-a]pyridin-2-ium hexafluorophosphate, 2a, has been prepared as precursor for the respective pyrido-annelated N-heterocyclic carbene. [(NHC)2Ag]PF6, 3, has been synthesized by the reaction of 2a with AgCl=KOH in dichloromethane (DCM). Unexpectedly, the reaction of 3 with (tht)AuBr yielded both (NHC)AuBr and [(NHC)Au(tht)]PF6 which formed a 1 : 1 cocrystal (4a,b). The complexes are aggregated to infinite chains, which are governed by both π-π stacking and weak aurophilic interactions. Subsequent oxidation of the co-crystalline material with CsBr3 gave (NHC)AuBr3, 5. All compounds were characterized by NMR spectroscopy, mass spectrometry and elemental analysis. Additionally, compounds 2a and 5 were investigated by electronic spectroscopy: 2a behaves like a typical aromatic compound exhibiting absorption and fluorescence bands attributable to π-π* transitions. The Au(III) complex 5 exhibits ligand-centered fluorescence at room temperature and both ligand-centered fluorescence and a weak phosphorescence at 77 K.

scholarly journals Synthesis and Characterization of Pyridino(1,4-Η-cyclohexa-1,3-diene)Derivatives of Iron Tricarbonyl Complexes

2011 ◽  
Vol 8 (3) ◽  
pp. 960-965
Author(s):  
T. I. Odiaka ◽  
O. F. Akinyele ◽  
I. A. Adejoro
Keyword(s):  
Room Temperature ◽  
Synthesis And Characterization ◽  
Substituted Pyridines ◽  
Iron Tricarbonyl ◽  
Derivatives Of

In this synthesis, we have been able to show that, the addition of x- substituted pyridines, (X = H, 2- Me, 3- Me 4- Me, 4-NH2and 4-N(CH3)2to the dienyl ring of the organometallic cation, [(Fe(CO)3(1-5-η-2-Me0C3H6)]BF4and [(Fe(CO)3(1-5-η-C6H7)]BF4gives ionic substituted diene products, (X C5H4-C6H6Y (Fe(CO)3] BF4,Y=H or 2-MeO. The reaction takes place at ordinary room temperature. The resulting products were isolated and characterized.

scholarly journals Synthesis and Characterization of [2-(carboxy methylene-amino)-phenyl imino] acetic acid (L) and its some metal complexes

2013 ◽  
Vol 10 (3) ◽  
pp. 547-560
Author(s):  
Baghdad Science Journal
Keyword(s):  
Acetic Acid ◽  
Metal Complexes ◽  
Metal Content ◽  
Magnetic Moments ◽  
Synthesis And Characterization ◽  
Spectroscopic Methods ◽  
Conductivity Measurements ◽  
Geometrical Structures ◽  
Square Planar

New Schiff base, namely [2-(carboxy methylene-amino)-phenyl imino] acetic acid (L) and its some metal complexes [LCo.2H2O], [LNi.2H2O], [LCu].3H2O, [LCd.2H2O], [LHg.2H2O] and [LPb.2H2O], were reported and characterized by elemental analysis, metal content, spectroscopic methods, magnetic moments and conductivity measurements, it is found that the geometrical structures of these complexes are octahedral [Co(II), Ni(II), Cd(II), Hg(II), Pb(II) and square planar Cu(II).The complexes have been found to posses 1:1 (M:L) stoichiometry

scholarly journals Synthesis and characterization of a new ZIF-67@MgAl2O4 nanocomposite and its adsorption behaviour

RSC Advances ◽  
2021 ◽  
Vol 11 (22) ◽  
pp. 13245-13255
Author(s):  
Mehdi Davoodi ◽  
Fatemeh Davar ◽  
Mohammad R. Rezayat ◽  
Mohammad T. Jafari ◽  
Mehdi Bazarganipour ◽  
...  
Keyword(s):  
Room Temperature ◽  
Magnesium Aluminate ◽  
Synthesis And Characterization ◽  
Magnesium Aluminate Spinel ◽  
Adsorption Behaviour ◽  
Zeolitic Imidazolate Framework ◽  
Simple Method

New nanocomposite of zeolitic imidazolate framework-67@magnesium aluminate spinel (ZIF-67@MgAl2O4) has been fabricated by a simple method at room temperature with different weight ratios.

scholarly journals Synthesis and Characterization of Polyphosphazenes Modified with Hydroxyethyl Methacrylate and Lactic Acid

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Evelyn Carolina Martínez Ceballos ◽  
Ricardo Vera Graziano ◽  
Gonzalo Martínez Barrera ◽  
Oscar Olea Mejía
Keyword(s):  
Lactic Acid ◽  
Ring Opening ◽  
Room Temperature ◽  
Block Structure ◽  
Ring Opening Polymerization ◽  
Synthesis And Characterization ◽  
Poly Lactic Acid ◽  
Hydroxyethyl Methacrylate ◽  
H Nmr

Poly(dichlorophosphazene) was prepared by melt ring-opening polymerization of the hexachlorocyclotriphosphazene. Poly[bis(2-hydroxyethyl-methacrylate)-phosphazene] and poly[(2-hydroxyethyl-methacrylate)-graft-poly(lactic-acid)-phosphazene] were obtained by nucleophilic condensation reactions at different concentrations of the substituents. The properties of the synthesized copolymers were assessed by FTIR,1H-NMR and31P-NMR, thermal analysis (DSC-TGA), and electron microscopy (SEM). The copolymers have a block structure and show twoTg's below room temperature. They are stable up to a temperature of 100°C. The type of the substituents attached to the PZ backbone determines the morphology of the polymers.

Room temperature chemical synthesis and characterization of interconnected polyaniline quantum dots

2012 ◽  
Vol 68 ◽  
pp. 364-366 ◽  
Author(s):  
D.S. Dhawale ◽  
C.D. Lokhande
Keyword(s):  
Quantum Dots ◽  
Chemical Synthesis ◽  
Room Temperature ◽  
Synthesis And Characterization

Physico-chemical characterization of Cu2+-exchanged sepiolite

Clay Minerals ◽  
1985 ◽  
Vol 20 (4) ◽  
pp. 467-475 ◽  
Author(s):  
A. Corma ◽  
J. Pérez-Pariente ◽  
J. Soria
Keyword(s):  
Chemical Characterization ◽  
Tetrahedral Symmetry ◽  
Pyramidal Geometry ◽  
Physico Chemical ◽  
One Step ◽  
Lower Temperature ◽  
Coordinated Water ◽  
Square Pyramidal Geometry ◽  
Different Levels

AbstractCopper-sepiolites exchanged at different levels have been studied by ESR, IR, and TG. The results indicate that in the unheated samples the Cu2+ ions are located in octahedral edge positions. After dehydration, the Cu2+ ions occur in two positions with different environments. Some of the Cu2+ ions lose the two molecules of coordinated water in one step, at low dehydration temperatures, and adopt a square pyramidal geometry. Other Cu2+ ions lose the coordination water in two steps, at lower temperature than the natural sepiolite, and adopt a tetrahedral symmetry.

scholarly journals Synthesis and characterization of Ni(II), Cu(II) and Co(III) complexes with polyamine-containing macrocycles bearing an aminoethyl pendant arm

2004 ◽  
Vol 69 (8-9) ◽  
pp. 641-649 ◽  
Author(s):  
Fouzia Rafat ◽  
M.Y. Siddiqi ◽  
K.S. Siddiqi
Keyword(s):  
Metal Ion ◽  
Magnetic Moments ◽  
Carbon Chain ◽  
Macrocyclic Complex ◽  
Synthesis And Characterization ◽  
Epr Spectrum ◽  
Pendant Arm ◽  
Octahedral Environment ◽  
Electrical Conductivities

Reaction of [M(ppn)2]X2 (where M = Cu(II), Ni(II), Co(II) and ppn = 1,3-diaminopropane) with formaldehyde and ethylenediamine in methanol results in the ready formation of a 16-membered macrocyclic complex. The complexes were characterized by elemental analysis, IR, EPR, electronic spectral data magnetic moments and conductance measurements. The Cu(II), Ni(II) and Co(III) complexes are coordinated axially with both pendant groups of the hexadentate macrocycle. These pendant donors are attached to the macrocycle by a carbon chain. The electrical conductivities of the Cu(II) and Ni(II) chelates indicated them to be 1:2 electrolytes whilst those of Co(III) is a 1:3 electrolyte in DMSO. The EPR spectrum of the copper complex exhibited G at 3.66, which indicates a considerable exchange interaction in the complex. Spectroscopic evidence suggests that in all of the complexes the metal ion is in an octahedral environment.

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