Organomercury Compounds

About: Organomercury Compounds is a research topic. Over the lifetime, 392 publications have been published within this topic receiving 6465 citations.

Flexible ein- und zweikernige Aralkyl- und Aralkoxyquecksilberverbindungen als Modelle zum Nachweis von Hg(II)-Hg(II)-Wechselwirkungen

Abstract: für Naturforschung in cooperation with the Max Planck Society for the Advancement of Science under a Creative Commons Attribution 4.0 International License. Dieses Werk wurde im Jahr 2013 vom Verlag Zeitschrift für Naturforschung in Zusammenarbeit mit der Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. digitalisiert und unter folgender Lizenz veröffentlicht: Creative Commons Namensnennung 4.0 Lizenz. Flexible einund zweikernige Aralkylund Aralkoxyquecksilberverbindungen als Modelle zum Nachweis von Hg(II)-Hg(II)-Wechselwirkungen

The examination of organomercury compounds and their formulations by thin-layer chromatography

Abstract: Thin-layer chromatographic methods for the separation and identification of organomercury compounds have been developed and applied to the examination of commercial-quality organomercurials and seed-dressing formulations. The organomercury compounds, in the form of their chlorides, are separated on silica gel by continuous development with cyclohexane-acetone (4 + 1), and detected as orange-brown spots by spraying the plate successively with copper sulphate and sodium sulphite-potassium iodide reagents. If organomercury salts other than chlorides are present, they must be converted into the chlorides by adding aqueous sodium chloride solution to the spotting solvent.A method for the semi-quantitative assay of inorganic mercury [as mercury(II)] in the compounds, at levels between 1 and 14 per cent., is also described. The inorganic mercury [as mercury(II) chloride] is separated by using carbon tetrachloride-acetone (7 + 3) as the developing solvent and is determined by visual comparison with standards.Little or no mercury-containing impurity was found in samples of phenylmercury nitrate, phenylmercury acetate and phenylmercury chloride examined, but methoxyethylmercury chloride and ethoxyethylmercury chloride samples contained as many as five mercury-containing impurities and up to 12 per cent. of inorganic mercury compounds.

Stable organomercury compounds containing an o-iminosemiquinone radical ligand

Abstract: A series of stable paramagnetic organomercury compounds containing the 4,6-di-tert-butyl-N-(2,6-diisopropylphenyl)-o-iminobenzosemiquinone ligand (imSQ) with the general formula imSQHgR (R = Ph, Et, Prn, Bun, Pri, Hexc, CH2SiMe3, p-FPh, Fc, p-Me2NPh) were synthesized. The molecular and electronic structures of the synthesized compounds were investigated by EPR spectroscopy and X-ray diffraction. The o-iminosemiquinone ligand shows the unusual amidophenoxy-type coordination mode. In the EPR spectra of the compounds imSQHgR, the hyperfine coupling constant of magnetic mercury isotopes (199,201Hg) depends on the nature of the substituent R, the temperature, and the nature of the solvent. Voltammetric investigations showed that the complex imSQHgFc undergoes three reversible one-electron redox steps related to the redox transformations of both the o-iminoquinone ligand and the metallocene moiety of the molecule.

Critical Review of Analytical Methods for Determination of Inorganic Mercury and Methylmercury Compounds

Abstract: This review describes determinations of mercury compounds under three categories: total mercury; separate determinations of inorganic mercury(II) and organomercury compounds by selective reduction; and speciation of inorganic mercury(II), monomethylmercury cation, and dimethylmercury. Topics described for each category include sample treatment, separation, detection, and limit of detection. Finally, we note that most methods would not detect dimethylmercury if it were present.