Iodide Mercury

Mercury [) iodide, HgiL- pale green, is precipitated from a solution of a Hg2 salt by I". 

Mercury iodide aquabasic ammonobasic (Iodide of Millon s base) Mercury nitride Methazoic acid... 

Mercury cyanide, 5, 1062 Mercury electrodes potential range aqueous solution, 1, 480 Mercury fluoride, 5. 1059 Mercury fulminate, 2, 7, 12 5, 1063 Mercury halides, 5, 1049 Mercury iodate, 5,1068 Mercury iodide, 5. 1059 Mercury ions Hgf... 

Mercury iodide offers an example of a layer structure consisting of tetrahedra sharing all of their vertices (Fig. 16.23). Much more frequent are framework structures they include the different modifications of Si02 and the aluminosilicates that are discussed in Section 12.5. Another important class of aluminosilicates are the zeolites. They occur as minerals, but are also produced industrially. They have structures consisting of certain polyhedra that are linked in such a way that hollows and channels of different sizes and shapes are present. 

Then he swiftly produced as many different varieties of the compounds as possible, including dimethylzinc, which convinced other scientists to accept Avogadro s theory, a foundation of atomic chemistry and methyl-mercury iodide, the first of many organomercury compounds known to poison people who eat mercury-contaminated fish. Despite his skill at synthesis, Frankland did not discover tetraethyl lead, the gasoline additive that became one of the most important industrial compounds of the mid-twentieth century (Chapter 6). 

Red phosphorus, sulfur but with carbon, the observed ignition has been attributed to presence of impurities mercury iodide, potassium iodide, silver nitrate, potassium carbonate. 

Fluorine decomposes calcium iodide, lead iodide, mercury iodide and potassium iodide at ambient temperature, and the liberated iodine ignites, evolving much heat. 

Ealy [ 75 ] also used conversion to alkyl mercury iodides for the gas chromatographic determination of organomercury compounds in benzene extracts of water. The iodides were then determined by gas chromatograph of the benzene extract on a glass column packed with 5% of cyclohexane-succinate on Anakron ABS (70-80 mesh) and operated at 200 °C with nitrogen (56 ml min-1) as carrier gas and electron capture detection. Good separation of chromatographic peaks was obtained for the mercury compounds as either chlorides, bromides, or iodides. The extraction recoveries were monitored by the use of alkylmer-cury compounds labelled with 203 Hg. 

Williams-Thorpe, O., Potts, P. J., and Webb, P. C. (1999). Field-portable non-destructive analysis of lithic archaeological samples by X-ray fluorescence instrumentation using a mercury iodide detector Comparison with wavelength-dispersive XRF and a case study in British stone axe provenancing. Journal of Archaeological Science 26 215-237. 

As mentioned earlier (see page 373), methylation of (+)-(i )-ethyl phenyl sulfoxide 136 with methyl iodide in the presence of mercury iodide affords the corresponding oxosulfonium salt (+)-(/ )-l 35 (172). That its demethylation by iodide anion yields sulfoxide 136 with the same configuration as that of the starting one indicates that 5-methylation of sulfoxides occurs with retention of configuration. 

Although prepared in a similar manner to the lead compound, the product formed with mercury iodide contains one atom less of sulphur per molecule, thus, mercury thiodi-imide, HgN2S.NH3. 

In order to avoid biological activity, samples are occasionally poisoned by adding chemicals containing ions that will not be measured in the laboratory. Mercury iodide is a convenient preservation substance. It is available as small orange crystals a single small crystal added to a bottle of water is adequate. Addition of a preservative to a sample should be clearly marked on the bottle. Normally, each laboratory advocates a specific preservative. 

Dilithio 8 reacts with mercury iodide to give tetramer 11, as a 1 1 complex, in 80% yield. Longer reaction times and additional mercury iodide produces the 2 1 complex 12. Synthesis of neutral tetramer 6 is achieved by using silver acetate to decomplex diiodide 12. 

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