Phenyl mercuric chloride

Fig. 1 Reflectance scan of a chromatogram track with 30 ng substance (calculated as Hg) per chromatogram zone 1 = methylmercuric chloride, 2 = ethylmercuric chloride, 3 = phenyl-mercuric chloride, 4 = dimethylmercury, 5 = diphenylmercury.

Yields as high as 77% have been obtained by this procedure. It is difficult to recover all the product from the mother liquor. The use of a 1 1 ratio of sodium trichloroacetate and phenyl-mercuric chloride gave yields of 39-45%, while a 1.25 1 ratio gave a 61% yield of product. 

Grandberg, Kost, and Zheltikova108 have shown recently that mercuric salts mercurate pyrazoles in the 4-position and also give other complexes with variable quantities of the mercuric salts. The proportion of mercuric salt bound as a complex depends on the basicity of the starting pyrazole. The mercuric group in mercurated pyrazoles behaves in a variety of reactions just as phenyl mercuric chloride.108,219,350... 

However, this reaction does not appear to have been reported. The stoichiometric carbonylation of phenylpalladium chloride, prepared in situ from phenyl-mercuric chloride, has been described600 ... 

Ethynylpyridine with mercuric acetate forms a polymeric species, 150, whose unit, illustrates the coordination situation around the mercury site (96JOM(515)259). Similar situation is observed in (pyrid-2-yl)phenyl mercuric chloride (89JCS(CC)570). 

Preparation. The reagent is prepared in 75% yield by the reaction of phenyl-mercuric chloride, dibromochloromethane, and the f-butanol monosolvate of commercial potassium r-butoxide.1... 

Low resolution mass spectrometry (MS), especially in tandem with gas chromatography, and nuclear magnetic resonance (NMR) spectroscopy have been reviewed with respect to their application to pesticide residue analysis. Sample preparation, direct probe MS analysis, GC-MS interface problems, spectrometer sensitivity, and some recent advances in MS have been studied. MS analyses of pesticide residues in environmental samples (malathion, dieldrin, dia-zinon, phenyl mercuric chloride, DBF, and polychlorinated biphenyls) have been illustrated. Fragmentation patterns, molecular ions, isotope peaks, and spectral matching were important in the identification of these pesticides. The sensitivity limitations of NMR and recent improvements in sensitivity are discussed along with examples of pesticide analyses by NMR and the application of NMR shift reagents to pesticide structure determinations. 

Figure 3. Mass spectra of phenyl mercuric chloride...

Phenyl Mercuric Chloride, An organomercury compound was believed responsible for a large fish kill in Boone Lake, Tennessee in 1968. Residue obtained from empty, unlabeled drums found in the lake was analyzed by MS using the direct probe method. Mercury has six isotopes of enough abundance to be observed by mass spectrometry (5). The mercury isotope pattern was observed in the molecular ion region of the spectrum (M" 314, Figure 3) where it is distorted by the chlorine isotope... 

Dextran [9004-54-0] Mf 6,000-220,000. Solutions keeps indefinitely at room temperature if 0.2mL of Roccal (10% alkyldimethylbenzylammonium chloride) or 2mg phenyl mercuric acetate are added per lOOmL solution. [Scott and Melvin Anal Biochem 25 1656 7955.]... 

The reduction of 2-methyl-1,2,3,4-tetrahydro-y-carboline (92) with zinc and hydrochloric acid in the presence of mercuric chloride gives the indolenine derivative, 2-methyl-l,2,3,4,4a,9b-hexahydro-y-carbo-line (93). A related compound, 4,9b-diethyl-2-methyl-l,2,3,4,4a,9b-hexahydro-y-carboline (96), was obtained by catalytic hydrogenation of 95, which was prepared by Fischer ring closure of the phenyl-hydrazone 94. The stereochemistry of the B/C ring junction in these... 

Another method used for nitrate determination on dried and milled herbage employs the nitrate selective electrode. One of the first published methods was that of Paul and Carlson (1968). Other anions, especially chloride, can interfere. These authors removed chloride with silver resin, but Barker ef al. (1971) omitted the resin because it tended to foul the electrode and cause excessive drift. Normally the Cl N03 ratio is so low as not to interfere, but saline precipitation from coastal plots could affect this. The method was further modified to allow storage of extracts for up to 64 h by adding a preservative of phenyl-mercuric acetate and dioxane, both very toxic (Baker and Smith, 1969). This paper mentions the need to change the electrode s membrane, filling solution and liquid ion exchanger every 2 months to minimize chloride interference. It is easy to overlook electrode maintenance between batches of nitrate analyses, and this can lead to errors and sluggish performance. 

Phenyl selenide, CeHg.SeH.1—This selenide may be obtained as follows (1) Selenium tetrachloride is allowed to react with benzene in the presence of aluminium chloride. (2) Magnesium phenyl bromide in ether solution is treated with finely divided selenium and the addition product treated with cold hydrochloric acid. The ether layer is then removed, the extracted solution treated with more ether and the extracts combined, then shaken with one equivalent of sodium hydroxide, calculated on the basis of the total amount of selenium used, and dissolved in water to make a 25 per cent, solution. The ether solution is then dried with calcium chloride, the ether removed and the residue distilled, diphenyl diselenide and diphenyl selenide, B.pt. 303° C., being obtained. The sodium hydroxide solution on acidification with a slight excess of concentrated hydrochloric acid, followed by three more extractions with ether, gives on removal of the solvent almost pure phenyl selenide, B.pt. 182° C. The product melts at 60° C., and is insoluble in water, but dissolves in alcohol mercuric chloride gives a white precipitate.2... 

Chloride Carbon -tetrachloride Chloride reacted with phenyl mercuric nitrate to produce phenyl mercury chloride, then carbon tetrachloride extraction, then GLC 0.4mg L- [799]... 

The aldehyde is also obtained by the hydroformylation of allylbenzene.6 An alternative method involves benzylation of 2-ethylthiazoline followed by reduction with aluminum amalgam and cleavage with mercuric chloride.( A sixth method of preparation is the phenylation of 2-vinyl-5,6-... 

Mercury diphenyl has been prepared in a number of ways. The most important methods are by the action of sodium on a mixture of bromobcnzene and mercuric chloride 1 from sodium amalgam and phenyl mercuric iodide 2 by the interaction of phenyl mercuric bromide and potassium sulfide2 or phenyl mercuric acetate and sodium stannite 3 from phenyl magnesium bromide and mercuric chloride 4 by the action of phenyl hydrazine on mercury compounds 5 from mercuric chloride and phenyl arsenious oxide 6 and from diphenyl mercuric ammonium acetate and sulfur compounds.7... 

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