Methylmercury iodide

Methylmercurie iodide. Mercury diethyl, zinc dimethyl. Prankland, Annahn, 1859, iix, 57 Jahresber., 1859, p. 413. 

Four rats died soon after developing severe ataxia following inhalation of unspecified concentrations of methylmercury iodide vapor for 22 days (Hunter et al. 1940). 

The calibration curve was obtained by bringing 200 mg of sample D, 2 ml standard CH3HgCl solution in the range 0-200 ppb, 30 mg lAc and 750 p 1 sulfuric acid in HS-vials and analyzing them. The curve has a linear shape (Figure 6). The recovery of the different spikes is proportional indicating, as stated earlier, that probably all methylmercury is released and that an equilibrium exists between the formation reaction of methylmercury iodide and side reactions. 

In Figure 14 is shown the mass spectrum of the purified and distilled extracts of methylmercury compounds from fish obtained by the combined GC-MS instrument. The spectrum is similar to the reference mass spectrum of methylmercury chloride analysed by the direct inlet. Both spectra indicate the existence of methylmercury iodide, and no separation could be observed between the chloride and iodide on the total ion current recorder. 

The reaction between mercury and methyl iodide in sunlight was discovered in 1853 (oddly enough, in England) by Frankland it is still a very simple and effective way of making methylmercury iodide. The... 

A method is presented to determine organomeicury compounds in aquatic sediments. The compounds are liberated from the sediment by addition of sulfuric acid and then immediately converted to the iodide form by iodoacetic acid in a closed vial. The liberated methylmercmy iodide is then Headspace-injected on a gaschromatograph and detected with a Microwave-induced-plasma detector. Analysis of 1 sample takes less than 15 minutes. Detection limit equals 0.014 p g methylmercury/g sediment. 

Stary. J. and Prasilova, J. (1976b) Radiochemical determination of methylmercury chloride. II. Exchange reaction with labelled iodide. Radiochem. Radioanal. Letters. 27, 51-56. 

Both [MeHglNOj and [MeHglOCOCF, are prepared from methylmercury(II) iodide. 

Methylenedianiline dihydrochloride Methylhydrazine and its salts Methyl iodide Methylmercury compounds Methyl methanesulfonate... 

Transformation of methylmercury chloride to bromide, iodide or cyanide. Shake a benzene solution of methylmercury chloride with excess hydrobromic acid, potassium iodide or potassium cyanide in dilute aqueous solution. Dry the benzene layers with sodium sulphate and concentrate them by evaporation under reduced pressure. 

The bromide, iodide and cyanide from the fish extracts moved as methylmercury bromide, iodide, and cyanide (Figure 11) when... 

Fig. 11. Thin-layer chromatogram on silica gel of authentic methyl-mercurychloride (1), iodide (3), bromide (5), and cyanide (7) together with the corresponding compounds prepared from methylmercury chloride extracted from pike (2,4,6,8)...

Sample solutions, which contained hydrogen sulphide or sulphur poisoned the gas chromatographic system, so that either no peaks or smaller than expected peaks of methylmercury compounds were obtained. In such cases the system was improved by injection of benzene solutions of methoxyethylmercury iodide or mercuric chloride. 

The compound methylpentafluorophenylmercury has been obtained by adding an ether suspension of methylmercury(II) iodide to pentafluoro-phenylmagnesium bromide in ether. In the same manner, pentafluoro-phenylphenylmercury has been obtained from phenylmercury(II) chloride. The following cleavage reactions have been observed ... 

IsotopicaUy labelled MeHg was used to investigate artefact formation in water samples during derivatisation with NaBEt4. Halide ions were found to induce different transformation processes. While chloride and bromide converted MeHg into Hg , iodide hindered the ethylation of methylmercury. The effect was shown to occur only during the derivatisation step, and in contrast to ethylation, propylation with NaBPr4 did not cause any transformation. 

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