Preparation and structural characterization of [Ph3Sn(IV)]+ complexes with pyridine-carboxylic acids or hydroxypyridine, -pyrimidine and -quinoline

Szorcsik, Attila; Nagy, László; Scopelliti, Michelangelo; Deák, Andréa; Pellerito, Lorenzo; Galbács, Gábor; Hered, Mónika

doi:10.1016/j.jorganchem.2005.12.019

Cited by 26 publications

(18 citation statements)

References 22 publications

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“…Based on the results obtained for the acid-catalysed aquation, one can assume an analogous mechanism for the first-aquation stage in alkaline media; namely chelate-ring opening at the Cr-N bond, leading to formation of the intermediate with the one-end bonded ligand (S 0 -H 2 O). Under the experimental conditions (pH [ 13), the coordinated water undergoes a rapid protolytic dissociation to give the hydroxo-and oxo-derivatives (S 0 -OH and S 0 -O, respectively), which are the reactive species. The reaction sequence for the first lutidinato ligand liberation from the [Cr(lut) 3 ] 3-complex is shown in Scheme 4.…”

Section: Resultsmentioning

confidence: 99%

“…This compound acts usually as a bidentate ligand, forming a 5-membered chelate ring of the picolinato-type (Scheme 2) [9][10][11][12][13][14][15][16][17][18][19][20][21][22]. In addition, the 4-COO 2 group can be bonded to a second coordination centre, which leads to self-assembly of supramolecular architectures, where monodentate-coordinated -COO 2 groups act as bridges between the neighbouring metal atoms [11][12][13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the 4-COO 2 group can be bonded to a second coordination centre, which leads to self-assembly of supramolecular architectures, where monodentate-coordinated -COO 2 groups act as bridges between the neighbouring metal atoms [11][12][13][14][15][16][17][18][19][20][21]. The dimensionality of the polymers depends on the pH of solution; higher pH gives higher dimensions, whereas at lower pH mainly mononuclear complexes are formed [23].…”

Section: Introductionmentioning

confidence: 99%

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Chromium(III) complexes with lutidinic acid: kinetic studies in HClO4 and NaOH solutions

Kita

Marai

Iglewski

2008

Transition Met Chem

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Chromium(III)-lutidinato complexes of general formula [Cr(lutH) n (H 2 O) 6-2n ] 3-n (where lutH -is N,Obonded lutidinic acid anion) were obtained and characterized in solution. Acid-catalysed aquation of [Cr(lutH) 3 ] 0 leads to only one ligand dissociation, whereas base hydrolysis produces chromates(III) as a result of subsequent ligand liberation steps. The kinetics of the first ligand dissociation were studied spectrophotometrically, within the 0.1-1.0 M HClO 4 and 0.4-1.0 M NaOH range. In acidic media, two reaction stages, the chelate-ring opening and the ligand dissociation, were characterized. The dependencies of pseudo-first-order rate constants on [H ? ] are as follows: k obs1 = k 1 ? k -1 /K 1 [H ? ] and k obs2 = k 2 K 2 [H ? ]/(1 ? K 2 [H ? ]), where k 1 and k 2 are the rate constants for the chelate-ring opening and the ligand dissociation, respectively, k -1 is the rate constant for the chelate-ring closure, and K 1 and K 2 are the protonation constants of the pyridine nitrogen atom and coordinated 2-carboxylate group in the one-end bonded intermediate, respectively. In alkaline media, the rate constant for the first ligand dissociation depends on [OH -]: k obs1 = k OH(1) ? k O [OH -], where k OH(1) and k O are rate constants of the first ligand liberation from the hydroxo-and oxoforms of the intermediate, respectively, and K 2 is an equilibrium constant between these two protolytic forms. Kinetic parameters were determined and a mechanism for the first ligand dissociation is proposed. The kinetics of the ligand liberation from [Cr(lut)(OH) 4 ] 3-were also studied and the values of the pseudo-first-order rate constants are [OH -] independent.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Chromium(III) complexes with lutidinic acid: kinetic studies in HClO4 and NaOH solutions

Kita

Marai

Iglewski

2008

Transition Met Chem

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“…In this article, we report an alternative, non-hydrothermal preparation which has afforded 2 and 3 in high yield. Bearing in mind that the coordination ability of the carboxylate ligands toward metal ions frequently depends on hydrothermal or non-hydrothermal methods used to prepare the complexes [1,[5][6][7][8], we investigated the crystal structure of obtained compounds with X-ray crystallography. By comparing the crystallographic data, it can be seen that the crystal structure of the obtained complexes look similar to those reported in the literature [3,4].…”

Section: Introductionmentioning

confidence: 99%

Cadmium(II) and calcium(II) complexes with N,O-bidentate ligands derived from pyrazinecarboxylic acid

Barszcz

Masternak

Hodorowicz

et al. 2012

J Therm Anal Calorim

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The synthesis and characterization of cadmium(II) and calcium(II) complexes with N,O-bidentate ligands derived from pyrazinecarboxylic acid (3-hydroxy-2-quinoxalinecarboxylic acid HL 1 , pyrazine-2-carboxylic acidwere studied by elemental analyses, IR, Raman spectroscopy and thermogravimetric methods (TG, DTG, DSC). In addition, the molecular structure of complex 1 has been determined by X-ray single crystal diffraction. Thermal analysis reveals a decomposition process of 1, 3 complexes in multiple stages. The data obtained from TG and DSC curves for 1, 3 confirm not only the presence but also the nature of water (crystallization and coordination) and the stoichiometry of the studied metal complexes. The results of thermal studies are in good agreement with their crystal structures. Thermal behavior of complex 2 indicates a single complete decomposition process of the sample. In addition, complex 2 as a coordination polymer is the most stable all of them and the thermal stability of the obtained complexes can be ordered in the following sequence: 1 \ 3 ( 2.

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“…Such a strict connection between structure of organotin(IV) carboxylates and their cytotoxic [8,12,19,20] behavior stimulated in the recent past our investigations on organotin(IV) derivatives of several carboxylic acids [21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Structural characterization of triorganotin(IV) complexes with sodium fusidate and DFT calculations

Abbate

Casella

Fiore

et al. 2010

Journal of Organometallic Chemistry

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Preparation and structural characterization of [Ph3Sn(IV)]+ complexes with pyridine-carboxylic acids or hydroxypyridine, -pyrimidine and -quinoline

Cited by 26 publications

References 22 publications

Chromium(III) complexes with lutidinic acid: kinetic studies in HClO4 and NaOH solutions

Chromium(III) complexes with lutidinic acid: kinetic studies in HClO4 and NaOH solutions

Cadmium(II) and calcium(II) complexes with N,O-bidentate ligands derived from pyrazinecarboxylic acid

Structural characterization of triorganotin(IV) complexes with sodium fusidate and DFT calculations

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