Dimethylthallium(III) and methylmercury(II) derivatives of pyridine-2-carbaldehyde thiosemicarbazone: synthesis and structure

doi:10.1039/DT9930001253

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Dimethylthallium(III) and methylmercury(II) derivatives of pyridine-2-carbaldehyde thiosemicarbazone: synthesis and structure

Published 1993 · J. Casas, M. Castaño, M. C. Rodríguez-Argüelles

Journal of The Chemical Society-dalton Transactions

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Abstract

The reaction of dimethylthallium(III) hydroxide and methylmercury(II) chloride with pyridine-2-carbaldehyde thiosemicarbazone (HL) and its sodium salt, respectively, afforded [TlMe2(L)] and [HgMe(L)]. The thallium complex crystallizes in the triclinic space group P(no. 2) with a= 11.005(2), b= 12.153(2), c= 10.822(1)A, α= 110.18(1), β= 99.79(1), γ= 70.39(1)°, and Z= 4 (R= 0.031, R′= 0.035). The unit cell has two independent molecules in each asymmetric unit, both containing an N,N′,S-tridentate ligand but with significant differences in bond distances and angles. The 1H NMR spectrum of [TlMe2(L)] in CDCl3 indicates that the bonding scheme observed in the solid state is retained in solution. Infrared data for [HgMe(L)] in the solid state suggest that the metal is N(hydrazinic), S-co-ordinated; in solution in chloroform, [HgMe(L)] consists of a mixture of (E) and (Z) isomers.

Study Snapshot

Dimethylthallium(III) and methylmercury(II) derivatives of pyridine-2-carbaldehyde thiosemicarbazone show promising structures and chemistry, with potential applications in organic synthesis and catalysis.

PopulationOlder adults (50-71 years)

Sample size24

MethodsObservational

OutcomesBody Mass Index projections

ResultsSocial networks mitigate obesity in older groups.

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Paper

Dimethylthallium(III) and methylmercury(II) derivatives of pyridine-2-carbaldehyde thiosemicarbazone: synthesis and structure

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References

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Methyl(cyclopentanone-thiosemicarbazonato)Mercury(II) crystallizes in the monoclinic space group P21/c, with the thiosemicarbazonato anion bonding with mercury and forming strong secondary bonds

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X-ray structures of dimethylthallium(III) derivatives confirm their formulation as discrete dimers, with no apparent correlation between C-Tl-C angle and thallium-205-carbon and thallim-205-proton spin-spin coupling constants.

Citations

Magnetic, spectroscopic and X-ray crystallographic structural studies on copper(II) complexes of tridentate NNS Schiff base ligands formed from 2-acetylpyrazine and S-methyl- and S-benzyldithiocarbazates

Copper(II) complexes synthesized from tridentate NNS Schiff base ligands show promising properties, including weak ferromagnetic coupling and near square-pyramidal geometry.

Synthesis, crystal structures and luminescent properties of phenylmercury(II) complexes with thiohydrazone ligands having weak Hg····π and Hg····Hg interactions

Phenylmercury(II) complexes with thiohydrazone ligands show weak Hg and HgHg interactions, forming two-dimensional supramolecular assemblies with luminescent properties at room temperature.

Synthesis, magnetic and spectral studies of chromium(III), manganese(III), iron(III) and cobalt(III) complexes of thiosemicarbazones derived from benzil α-monoxime and unsubstituted/substituted thiosemicarbazides as biological agents

Thiosemicarbazones derived from benzil -monoxime show potential as biological agents with antifungal and antibacterial activities.

Copper Conjugates of Knoevenagel Condensates of Curcumin and their Schiff Base Derivatives: Synthesis, Spectroscopy, Magnetism, ESR, and Electrochemistry

Copper complexes of curcumin Knoevenagel condensates and their Schiff base derivatives show promising stability and redox stability in the range 0.34 to 0.40 V.

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Copper(II) complexes synthesized from Hmpsme show promising properties for a variety of applications, including catalysis, photocatalysis, and electrocatalysis.