scholarly journals Spectral, thermal and magnetic characterization of 2, 3-dimethoxybenzoates of Co(II), Ni(II) and Cu(II)

2005 ◽  
Vol 70 (6) ◽  
pp. 833-842 ◽  
Author(s):  
Wieslawa Ferenc ◽  
Agnieszka Walkow-Dziewulska ◽  
Pawel Sadowsk ◽  
Janusz Chrusciel
Keyword(s):  
Magnetic Moments ◽  
Electronic Spectroscopy ◽  
X Ray Diffraction ◽  
Magnetic Studies ◽  
Thermal Stabilities ◽  
Bridging Ligands ◽  
X Ray ◽  
Carboxylate Groups ◽  
Polycrystalline Solids

Complexes of 2,3-dimethoxybenzoates of Co(II), Ni(II) and Cu(II) have been synthesized as hydrated or anhydrous polycrystalline solids and characterized by elemental analysis, IR, FIR and electronic spectroscopy, magnetic studies and X-ray diffraction measurements. The carboxylate groups bind as monodentate or symmetrical, bidentate chelating and bridging ligands. The thermal stabilities were determined in air. When heated they dehydrate to form anhydrous salts which are decomposed to the oxides of the respective metals. The magnetic susceptibilities of the complexes were measured over the range 77?300 K and the magnetic moments were calculated. The results show that the complexes of Ni(II) and Co(II) are high-spin complexes and that of Cu(II) forms a dimer.

scholarly journals Complexes of 4-chlorophenoxyacetates of Nd(III), Gd(III) and Ho(III)

2018 ◽  
Vol 35 (1) ◽  
pp. 67
Author(s):  
W. Ferenc ◽  
M. Bernat ◽  
J. Sarzyński ◽  
H. Głuchowska
Keyword(s):  
Thermal Decomposition ◽  
Magnetic Moments ◽  
X Ray Diffraction ◽  
Magnetic Studies ◽  
Bridging Ligands ◽  
X Ray ◽  
Gaseous Products ◽  
Carboxylate Groups ◽  
One Step ◽  
Ligand Fields

The complexes of 4-chlorophenoxyacetates of Nd(III), Gd(III) and Ho(III) have been synthesized as polycrystalline hydrated solids, and characterized by  elemental analysis, spectroscopy, magnetic studies and also by X-ray diffraction and thermogravimetric measurements. The analysed complexes have the following colours: violet for Nd(III), white for Gd(III) and cream for Ho(III) compounds. The carboxylate groups bind as bidentate chelating (Ho) or bridging ligands (Nd, Gd). On heating to 1173K in air the complexes decompose in  several steps. At first, they dehydrate in one step to form anhydrous salts, that next decompose to the oxides of respective metals. The gaseous products of their thermal decomposition in nitrogen were also determined and the magnetic susceptibilites were measured over the temperature range of 76-303K and the magnetic moments were calculated. The results show that 4-chlorophenoxyacetates of Nd(III), Gd(III) and Ho(III) are high-spin complexes with weak ligand fields. The solubility value in water at 293K for analysed  4-chlorophenoxyacetates is in the order of 10-4mol/dm3.

scholarly journals Magnetic, thermal and spectral characterization of 2,6-dimethoxybenzoates of Co(II), Ni(II) and Cu(II)

2006 ◽  
Vol 31 (2) ◽  
pp. 17-24 ◽  
Author(s):  
W. Ferenc ◽  
A. Walków-Dziewulska ◽  
J. Sarzynski
Keyword(s):  
Elemental Analysis ◽  
Magnetic Moments ◽  
Chelating Ligands ◽  
Carboxylate Group ◽  
X Ray Diffraction ◽  
Acid Anion ◽  
Magnetic Studies ◽  
X Ray ◽  
Polycrystalline Solids

The complexes of 2,6-dimethoxybenzoic acid anion with ions of Co(II), Ni(II), and Cu(II) have been synthesized as polycrystalline solids, and characterized by elemental analysis, spectroscopy, magnetic studies, and also by X-ray diffraction and thermogravimetric measurements. The analysed complexes have following colours: pink for Co(II), green for Ni(II), and blue for Cu(II) compounds. The carboxylate group binds as monodentate, and bidentate bridging and chelating ligands. On heating in air to 1173 K the complexes decompose in four, three or two steps. At first, they dehydrate in one or two steps to anhydrous salts, that next decompose to oxides of the respective metals. The solubility of the investigated dimethoxybenzoates in water at 293 K is of the order of 10-2 mol/dm3. Their magnetic moments were determined in the temperature range of 76-303 K. The results reveal the compounds of Co(II) and Ni(II) to be high-spin complexes and that of Cu(II) to form dimer.

scholarly journals Physicochemical properties of 3, 4, 5–trimethoxybenzoates of Mn(II), Co(II), Ni(II), Cu(II) and Zn(II)

2005 ◽  
Vol 70 (8-9) ◽  
pp. 1075-1088 ◽  
Author(s):  
Wieslawa Ferenc ◽  
Agnieszka Walków-Dziewulska ◽  
Jan Sarzynski
Keyword(s):  
Ir Spectroscopy ◽  
Magnetic Moments ◽  
X Ray Diffraction ◽  
Acid Anion ◽  
Magnetic Studies ◽  
Bridging Ligands ◽  
Magnetic Susceptibilities ◽  
X Ray ◽  
Carboxylate Groups ◽  
One Step

The complexes of Mn(II), Co(II), Ni(II), Cu(II) and Zn(II) with 3,4,5-trimethoxybenzoic acid anion of the formula: M(C10H11O5)2.nH2O, where n = 6 for Ni(II), n = 1 for Mn(II), Co(II), Cu(II), and n = 0 for Zn, have been synthesized and characterized by elemental analysis, IR spectroscopy X?ray diffraction measurements, thermogravimetry and magnetic studies. They are crystalline compounds characterized by various symmetry. They decompose in various ways when heated in air to 1273 K. At first, they dehydrate in one step and form anhydrous salts. The final products of decomposition are oxides of the respective metals (Mn2O3, Co3O4, NiO, CuO, ZnO). The solubilities of the analysed complexes in water at 293 K are in the orders of 10-2 ? 10-4 mol dm-3. The magnetic susceptibilities of the Mn(II), Co(II), Ni(II) and Cu(II) complexes were measured over the range of 76?303 K and the magnetic moments were calculated. The results show that the 3,4,5-trimethoxybenzoates of Mn(II), Co(II) and Ni(II) are high-spin complexes but that of Cu(II) forms a dimer [Cu2(C10H11O5)4(H2O)2]. The carboxylate groups bind as monodentate or bidentate chelating or bridging ligands.

Complexes of Light Lanthanides with 3,4-Dimethoxybenzoic Acid

2000 ◽  
Vol 65 (2) ◽  
pp. 179-191 ◽  
Author(s):  
Wiesława Ferenc ◽  
Agnieszka Walków-Dziewulska
Keyword(s):  
Magnetic Moments ◽  
Intermediate Formation ◽  
Lanthanide Ions ◽  
Ligand Field ◽  
X Ray Diffraction ◽  
Magnetic Studies ◽  
X Ray ◽  
Light Lanthanides ◽  
Polycrystalline Solids ◽  
Van Vleck

The complexes of light lanthanides with 3,4-dimethoxybenzoic acid, Ln(C9H9O4)3·4 H2O, where Ln = La(III), Ce(III), Pr(III), Nd(III), Sm(III), Eu(III) and Gd(III), have been synthesized as polycrystalline solids and characterized by elemental analysis, IR spectroscopy, thermogravimetric and magnetic studies and X-ray diffraction measurements. The complexes possess colours typical of Ln(III) ions (La, Ce, Eu, Gd white, Pr greenish, Nd violet and Sm cream). The carboxylate group in these complexes binds as a symmetrical, bidentate chelating ligand. On heating in air to 1 273 K the 3,4-dimethoxybenzoates of Ce(III), Pr(III), Sm(III), Eu(III) and Gd(III) first dehydrate to anhydrous salts that further decompose to oxides of the respective metals. The 3,4-dimethoxybenzoates of La(III) and Nd(III) decompose in three steps. Firstly, they dehydrate to anhydrous salts that further decompose to the oxides with the intermediate formation of oxycarbonates. The solubilities of the studied complexes in water at 293 K is in the order of 10-4-10-3 mol dm-3. Their magnetic moments were determined in the temperature range 77-298 K and found to obey the Curie-Weiss law. The values of μeff calculated for the all compounds (except that for Eu) are close to those obtained for Ln(III) by Hund and van Vleck. The results show that there is no influence of the ligand field on 4f electrons of the lanthanide ions in these polycrystalline compounds; 4f electrons probably do not participate in the formation of the Ln-O bonds.

scholarly journals The physico-chemical properties of 4-chlorophenoxyacetates of Mn(II), Co(II), Ni(II) and Cu(II)

2018 ◽  
Vol 33 (1) ◽  
pp. 07
Author(s):  
W. Ferenc ◽  
M. Bernat ◽  
J. Sarzynski ◽  
B. Paszkowska
Keyword(s):  
Magnetic Moments ◽  
Chemical Properties ◽  
Bidentate Ligands ◽  
X Ray Diffraction ◽  
Magnetic Studies ◽  
X Ray ◽  
Physico Chemical ◽  
One Step ◽  
Polycrystalline Solids ◽  
Ligand Fields

The complexes of 4-chlorophenoxyacetates of Mn(II), Co(II), Ni(II) and Cu(II) have been synthesized as polycrystalline solids, and characterized by elemental analysis, spectroscopy, magnetic studies and also by X-ray diffraction and thermogravimetric measurements. The analysed complexes have the following colours: pink for Co(II), green for Ni(II), blue for Cu(II) and a pale pink for Mn(II) compounds. The carboxylate group binds as monodentate and bidentate ligands. On heating to 1173K in air the complexes decompose in several steps. At first, they dehydrate in one step to anhydrous salts, that next decompose to the oxides of respective metals. Their magnetic moments were determined in the range of 76-303K. The results reveal them to be high-spin complexes of weak ligand fields.

Characterization of Cubic Ceria—Zirconia Powders by X-Ray Diffraction and Vibrational and Electronic Spectroscopy.

ChemInform ◽  
2004 ◽  
Vol 35 (6) ◽  
Author(s):  
Vicente Sanchez Escribano ◽  
Enrique Fernandez Lopez ◽  
Marta Panizza ◽  
Carlo Resini ◽  
Jose Manuel Gallardo Amores ◽  
...  
Keyword(s):  
Electronic Spectroscopy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Zirconia Powders

Characterization of cubic ceria–zirconia powders by X-ray diffraction and vibrational and electronic spectroscopy

2003 ◽  
Vol 5 (10) ◽  
pp. 1369-1376 ◽  
Author(s):  
Vicente Sánchez Escribano ◽  
Enrique Fernández López ◽  
Marta Panizza ◽  
Carlo Resini ◽  
José Manuel Gallardo Amores ◽  
...  
Keyword(s):  
Electronic Spectroscopy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Zirconia Powders

Synthesis, crystal structure solution and characterization of two organic–inorganic hybrid layered materials based on metal sulfates and 1,4-phenylenediamine

2019 ◽  
Vol 75 (11) ◽  
pp. 1502-1508
Author(s):  
Anabel Gonzalez Guillen ◽  
Marcin Oszajca ◽  
Katarzyna Luberda-Durnaś ◽  
Wieslaw Lasocha
Keyword(s):  
Three Dimensional ◽  
Layered Materials ◽  
X Ray Diffraction ◽  
Thermal Stabilities ◽  
Inorganic Hybrid ◽  
X Ray ◽  
Structure Solution ◽  
Elemental Analyses ◽  
Using Data

Two organic–inorganic hybrid layered materials, namely poly[(μ-1,4-diaminobenzene-κ2 N:N′)[μ3-sulfato(VI)-κ4 O:O′:O′′,O′′′]manganese], [Mn(SO4)(C6H8N2)] n , 1, and poly[(μ-1,4-diaminobenzene-κ2 N:N′)[μ3-sulfato(VI)-κ4 O:O′:O′′,O′′′]copper], [Cu(SO4)(C6H8N2)] n , 2, have been synthesized using 1,4-phenylenediamine (PPD) as an organic template and component (linker). Both materials form three-dimensional frameworks. The crystal structures were determined using data from powder X-ray diffraction measurements. The purity and morphology of the compounds were studied by elemental analyses and SEM investigations, and their thermal stabilities were determined by thermogravimetric and nonambient powder X-ray diffraction measurements, which indicated that 1 is stable up to 537 K and 2 is stable up to 437 K.

scholarly journals Low Temperature Synthesis and Characterization of MFe12O19 (M=Sr, Ca) by Solvo-combustion and Ceramic Method Using Mathematical Analysis

2019 ◽  
pp. 1-7
Author(s):  
A. B. Borkar ◽  
B. T. Borkar ◽  
K. P. Pande ◽  
S. R. Choubey
Keyword(s):  
Combustion Method ◽  
Hexagonal Structure ◽  
X Ray Diffraction ◽  
Magnetic Studies ◽  
Low Temperature Synthesis ◽  
Sem Images ◽  
Ceramic Method ◽  
X Ray ◽  
D Values

Hexagonal Magnetoplumbite Compound CaFe12O19 were synthesized by two methods  namely  Solvo  Combustion  and  Ceramic methods respectively. The compounds were studied by X-ray diffraction technique (XRD), Scanning electron Microscope (SEM), energy dispersive spectroscopy (EDS) and Magnetic Studies. The XRD studies indicate the sample synthesized by Solvo Combustion Method CaFe12O19 doesnot crystallize purely in Magnetoplumbite structure. Its ‘d’ values and (hkl) are slightly different than when small amount of Strontium is added to calcium which crystallize in Hexagonal Structure with a = 5.80 Ǻ and c = 22.15 Ǻ since the ionic radius of Strontium  is  more than that of Calcium.  The SEM images by Solvo Combustion and Ceramic method nearly indicate the morphology of the samples to be Hexagonal structure. The EDS indicates the clear presence of element Ca, Sr, Fe and O in the Solvo combustion and ceramic method prepared sample.

scholarly journals Magnetic, thermal and spectroscopic properties of lanthanide(III) 2-(4-chlorophenoxy) acetates, Ln(C8H6ClO3)3•nH2O

2013 ◽  
Vol 78 (9) ◽  
pp. 1335-1349 ◽  
Author(s):  
Wiesława Ferenc ◽  
Beata Cristóvão ◽  
Jan Sarzyński
Keyword(s):  
Magnetic Moments ◽  
Intermediate Formation ◽  
Spectroscopic Properties ◽  
Ligand Field ◽  
X Ray Diffraction ◽  
Magnetic Susceptibilities ◽  
X Ray ◽  
Gaseous Products ◽  
Carboxylate Groups ◽  
Thermogravimetric Studies

4-Chlorophenoxyacetates of lanthanides(III) were synthesized as polycrystalline hydrated solids with the general formulae: Ln(C8H6ClO3)3?2H2O (Ln = La(III), Pr(III), Sm(III), Eu(III) and Tb(III)), Ln(C8H6ClO3)3?H2O (Ln = Dy(III)) and Ln(C8H6ClO3)3?3H2O (Ln = Er(III), Tm(III), Yb(III) and Lu(III) and characterized by elemental analysis, FTIR spectroscopy, magnetic and thermogravimetric studies and also by X-ray diffraction (XRD) measurements. The complexes have colours typical for lanthanide(III) ions. The carboxylate groups bind as bidentate chelating. On heating to 1273 K in air the complexes decompose in three steps. At first they dehydrate in one stage to form anhydrous salts that next decompose to the oxides of respective metals with the intermediate formation of their oxychlorides. The gaseous products of compound thermal decomposition in nitrogen were also determined and the magnetic susceptibilities were measured over the ranges 76-303K and 1.8-303K, and their magnetic moments were calculated. The results show that 4-chlorophenoxyacetates of lanthanides(III) are high-spin complexes with weak ligand field.

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