Ligating properties of model bioheterocyclics. Ill. Synthesis and characterization of the palladium(II) and platinum(II) Complexes with 3,6-disubstituted-2,7-dihydro-1,4,5-thiadinzepine derivatives

doi:10.1016/S0020-1693(00)94681-4

Inorganica Chimica Acta

Volume 34, 1979, Pages 81-86

https://doi.org/10.1016/S0020-1693(00)94681-4 Get rights and content

Abstract

Palladium(II) and platinum(II) halides with 3,6-disubstituted-2,7-dihydro-1,4,5-thiadiazepine derivatives (L) form complexes of general formula, [MX₂·L′] (L′ = monohydrazone, VII). During the formation of these complexes, the thiadiazepine ring underwent hydrolytic cleavage at the carbon- nitrogen double bond, the nitrogen of which is involved in coordination with the metal ions These complexes have also been obtained from mono. hydrozones of 2,2″-thiodiacetophenones. These are diamagnetic and non-electrolytes. From their it, n.m.r., electronic spectra, T.G.A., D.T.A., magnetic susceptibility and conductivity measurements, these complexes have been assigned a square planar structure.

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Thermally induced structural transformations of a series of palladium(II) complexes with N-heteroaromatic bidentate hydrazone ligands
2014, Thermochimica Acta
Citation Excerpt :
Synthesis and properties of palladium(II) complexes has been a focus of some interest for some time [1–3].
Thermal stability of a series of palladium(II) complexes with N-heteroaromatic bidentate hydrazone ligands was investigated using a combination of experimental measurements and DFT calculations. All complexes exhibit a reversible second-order transition around 333 K, which can be attributed to structural reorganization of the ligand molecules. Thermal degradation begins in 570–610 K temperature region, with an endothermic peak, followed by exothermic peaks in DSC. TG measurements show a well-defined mass loss corresponding to the initial degradation, while subsequent processes are poorly separated. DFT calculations suggest that the initial degradation step occurs with release of Cl, which then reacts with remaining part of the complex molecule in an exothermic process. This leads to decomposition of the ligand molecule into four fragments corresponding to ethyl chloride, carbon dioxide, methyl amine, and the fragment with the aromatic group. Mass spectrum suggests that creation of these fragments most likely corresponds to the initial degradation, after which some of these coordinate to Pd center, whose coordination sphere is left incomplete by release of Cl. TG measurement to 1123 K indicates that the final degradation product at this temperature is palladium.
Ligating properties of model bioheterocyclics. Part VI. Synthesis, characterization and structures of iron(III) complexes with 3,6-disubstituted-2,7-dihydro-1,4,5-thiadiazepines
1985, Inorganica Chimica Acta
Iron(III) halides on reaction with 3,6-disubstituted-2,7-dihydro-1,4,5-thiadiazepine derivatives (L) form complexes of the general formula FeL₂X₃·nH₂O (X = Cl,.Br, n = 1.5, 4, 5; L = L-1, L-2, L-3 and L-4 for substituent R in para position of Ar group as H, CH₃, Cl and OCH₃ respectively). These complexes were characterized by elemental analysis, IR, far-IR, ESR, electronic, ¹H NMR and Mössbauer spectra, magnetic moments, molar conductance, t.g.a and d.t.a data. The data support octahedral structures for the cations [FeX₂L₄]⁺, with L acting as an unidentate ligand (via coordination through nitrogen atom) and tetrahedral structure for the anions, [FeX₄]⁻. All complexes are paramagnetic, having μ_eff values in the range 5.84–6.15 B.M. at room temperature. Thermal studies and IR spectra show the presence of uncoordinated water.
Palladium and Platinum
1981, Coordination Chemistry Reviews
Seven-membered rings with three heteroatoms: Chemistry of 1,2,5-and 1,4,5-thiadiazepines
2018, Current Organic Chemistry
3,6-Di(p-chlorophenyl)-2,7-dihydro-1,4,5 thiadiazepine: Crystal structure and decoding intermolecular interactions with hirshfeld surface analysis
2010, Journal of Chemical Crystallography

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Inorganica Chimica Acta

Ligating properties of model bioheterocyclics. Ill. Synthesis and characterization of the palladium(II) and platinum(II) Complexes with 3,6-disubstituted-2,7-dihydro-1,4,5-thiadinzepine derivatives

Abstract

Chem. Biol. Interactions

Inorg. Chim. Acta

Inorg. Chim. Acta

J. Inorg. Nucl. Chem.

Inorg. Nucl. Chem. Lett.

Nature (London)

Cancer Res.

Structure and Bonding

Platinum Metal. Rev.

Otem. Biol. Interactions

Thermally induced structural transformations of a series of palladium(II) complexes with N-heteroaromatic bidentate hydrazone ligands

Ligating properties of model bioheterocyclics. Part VI. Synthesis, characterization and structures of iron(III) complexes with 3,6-disubstituted-2,7-dihydro-1,4,5-thiadiazepines

Palladium and Platinum

Seven-membered rings with three heteroatoms: Chemistry of 1,2,5-and 1,4,5-thiadiazepines

3,6-Di(p-chlorophenyl)-2,7-dihydro-1,4,5 thiadiazepine: Crystal structure and decoding intermolecular interactions with hirshfeld surface analysis