New complexes of Mn(II), Co(II), Ni(II) AND Cu(II) with 2,2’- OR 2,4’-bipyridine and formates (Synthesis, thermal and other properties)

Czakis-Sulikowska, D.; Radwanska-Doczekalska, J.; Czylkowska, Agnieszka; Markiewicz, M.; Broniarczyk, A.

doi:10.1007/s10973-005-7230-6

Cited by 14 publications

(3 citation statements)

References 29 publications

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“…The disappearance of the strong absorption at 1680 cm −2 corresponding to C = O asymmetric stretching suggests that undissociated monomers are not present in the whitish layer. In addition, the two strong absorption peaks located at 1554 cm −1 and 1396 cm −1 correspond to asymmetric and symmetric COO − stretching, respectively . According to the literature, the previously cited peaks fall within the range of the asymmetric stretching modes of CO 3 2− devoted to zinc carbonate (ZnCO 3 ), which are commonly observed at 1500 ÷ 1552 cm −1 and 1380 ÷ 1385 cm −1 , respectively .…”

Section: Resultsmentioning

confidence: 83%

Sebacic acid as corrosion inhibitor for hot‐dip galvanized (HDG) steel in 0.1 M NaCl

Fedel

Poelman

Olivier

et al. 2019

Surface & Interface Analysis

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The potential of sebacic acid as a corrosion inhibitor for hot-dip galvanized steel in 0.1 M NaCl solution has been investigated. Different concentrations of the organic acid have been tested in order to understand the inhibition mechanism of the compound. The electrochemical test revealed a competitive mechanism between the dissolution of the metal in the acidified solution and the inhibition provided by the dicarboxylic species. The formation of a whitish layer consisting of zinc carboxylates and corrosion products was proved by means of scanning electron microscopy (SEM) investigation combined with Fourier transform infrared (FT-IR) analysis. A bidentate bridging coordination between the Zn(II) and the carboxylic species is suggested.

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Section: Resultsmentioning

confidence: 83%

Sebacic acid as corrosion inhibitor for hot‐dip galvanized (HDG) steel in 0.1 M NaCl

Fedel

Poelman

Olivier

et al. 2019

Surface & Interface Analysis

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“…To suggest a probable decomposition mechanism, measurements using coupled TA-MS or TA-IR instruments would be necessary. 26 The DSC curves (Fig. 9) of the complexes for the first decomposition step give different molar enthalpy changes, ranging from 36 kJ mol -1 (3) to 25 kJ mol -1 for (2).…”

Section: Thermal Analysismentioning

confidence: 99%

Transition metal complexes with pyrazole based ligands, part 27: Structural and thermal characterization of cobalt(II) halide and pseudohalide complexes with 4-acetyl-3-amino-5-methylpyrazole

Leovac

Tomić²,

Szécsényi

et al. 2007

JSCS

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The crystal and molecular structures of four tetrahedral structurally similar [Co(aamp) 2 X 2 ] complexes (aamp = 4-acetyl-3-amino-5-methylpyrazole, X = Cl, Br, I and NCS) were determined by X-ray diffraction analysis and are discussed in detail. It was found that the different capacity of the ligand X (NCS vs. Cl, Br, I) for the formation of non-bonding contacts influence the mode of molecular association in the solid state. The complexes were characterized by UV-Vis spectroscopy. The first step of the thermal decomposition of the compounds was checked and is discussed in the view of the IR spectrum of the intermediate isolated from [Co(aamp) 2 Br 2 ] by the quasi-isothermal technique.

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“…2,4 0 -Bipyridine (2,4 0 -bpy) is very interesting organic ligand because of its different possibility to coordinate with central ion. This N-donor may coordinate in two ways: as a monodentate ligand by 4 0 (N) nitrogen atom [8][9][10][11][12][13] and bidentate bridging by both nitrogens as heteronuclear and as bifunctional N-donor [14][15][16][17]. The publications with 2,4 0bpy only describe the coordination compounds of d-block elements.…”

Section: Introductionmentioning

confidence: 99%

Analytical and thermal investigations of new solid Y(III) and La(III) complexes

Czylkowska

Raducka

Mierczyński

et al. 2018

J Therm Anal Calorim

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New compounds with formulae Y(2,4 0-bpy) 1.5 Cl 3 Á8H 2 O (I), Y(2,4 0-bpy) 0.5 Br 3 Á8H 2 O (II), La(2,4 0-bpy)Cl 3 Á5H 2 O (III) and La(2,4 0-bpy) 1.5 Br 3 Á5H 2 O (IV) were prepared and characterized by chemical and elemental analysis, IR spectroscopy and powder X-ray diffraction. The thermal properties of compounds in the solid state were studied using TG-DTA techniques under dry air atmosphere. The thermal behavior of investigated compounds was studied in the temperature range 298-1273 K. They are stable up to 323 K. The complexes decompose in several stages, accompanied by endo-and exothermic effects. In all cases, the first step of pyrolysis is partial or total dehydration. When the temperature rises, deamination takes place. The solid final products of decomposition are Y 2 O 3 and La 2 O 3 , respectively. Additionally, for all complexes mass spectrometry was used to analyze principal volatile thermal decomposition and fragmentation products evolved during pyrolysis under dry air atmosphere. Keywords Y(III) and La(III) complexes Á 2,4 0-Bipyridine Á TG-DTA Á Mass spectra & Agnieszka Czylkowska

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New complexes of Mn(II), Co(II), Ni(II) AND Cu(II) with 2,2’- OR 2,4’-bipyridine and formates (Synthesis, thermal and other properties)

Cited by 14 publications

References 29 publications

Sebacic acid as corrosion inhibitor for hot‐dip galvanized (HDG) steel in 0.1 M NaCl

Sebacic acid as corrosion inhibitor for hot‐dip galvanized (HDG) steel in 0.1 M NaCl

Transition metal complexes with pyrazole based ligands, part 27: Structural and thermal characterization of cobalt(II) halide and pseudohalide complexes with 4-acetyl-3-amino-5-methylpyrazole

Analytical and thermal investigations of new solid Y(III) and La(III) complexes

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