Mercuric property

Acid amides have weakly amphoteric properties, and thus give salts such as CjHsCONHj.HCl with strong acids, and salts of the type C HsCONHNa with strong bases. These compounds have to be prepared at low temperatures to avoid hydrolysis, and are difficult to isolate. The mercury derivatives can, however, usually be readily prepared, because mercuric oxide is too feebly basic to cause hydrolysis of the amide, and the heavy mercuric derivatives crystallise well. 

Pinacol possesses the unusual property of forming a crystalline hexahydrate, m.p. 45°, and the pinacol is separated in this form from the unreacted acetone and the tsopropyl alcohol. The magnciaium is conveniently amalgamated by dissolving mercuric chloride in a portion of the acetone mercury is then liberated by the reaction ... 

Hydrazinothiazoles form stable complexes with Mn ", Ni. Cd Cu ", Co ", Fe ", and Fe " this property was used to detect small amounts of these salts in mixtures by paper chromatography (547, 548). Some infrared features of the complexes formed with the silver salts and with the mercuric salts have been reported (1583). 

The toxic effects of mercury and mercury compounds as well as their medicinal properties have been known for many centuries. In the first century AD, Pliny indicated the use of mercuric sulfide (cinnabar or vermilion) in medicine and in cosmetics. This compound was probably known to the Greeks in the time of Aristotle (13). 

The first chemical synthesis of these substances, using a procedure which yields 1-ribofuranosyl derivatives by pyrimidine bases, was described by Hall. By using the mercuric salt of 6-azathymine and tribenzoate of D-ribofuranosyl chloride, he obtained a mixture of two monoribosyl derivatives and a diribosyl derivative. He determined the structure of the 3-substituted derivative by the similarity of spectra and other properties to those of 3-methyl-6-razauracil. The structure of the 1-ribosyl derivative was then determined from the similarity of the spectra with 6-azathymine deoxyriboside obtained enzymatically. 

Oxalic Acid, Salts of, Bertholet (Ref 2) in 1883 noticed that some salts of oxalic add, eg mercuric or silver, have the properties of primary expls. According to Urbadski (Ref 14), although they have no practical application as initiators, it is interesting from a theoretical point of view, due chiefly to the fact that the general equation for the decompn of oxalates... 

Let us add here that the fabrication of polycrystalline semiconductive films with enhanced photoresponse and increased resistance to electrochemical corrosion has been attempted by introducing semiconductor particles of colloidal dimensions to bulk deposited films, following the well-developed practice of producing composite metal and alloy deposits with improved thermal, mechanical, or anti-corrosion properties. Eor instance, it has been reported that colloidal cadmium sulfide [105] or mercuric sulfide [106] inclusions significanfly improve photoactivity and corrosion resistance of electrodeposited cadmium selenide. 

Mercuric and mercurous nitrates have the same oxidising properties as nitrates. The first has been involved in accidents with phosphine (formation of a complex, which detonates on impact) and alkaline cyanides. In the latter case, it is assumed that the danger arises from the formation of mercury nitrite, which is highly unstable in one particular accident the use of an apparatus with a narrow neck aggravated the effect, causing an effect of confinement. The second nitrate led to more or less strong detonations with carbon (red-hot) and phosphorus (on impact). 

Silver fulminate is dimeric and rather endothermic (A+361.5 kJ/dimol, 1.21 kJ/g). It is readily formed from silver or its salts, nitric acid and ethanol, and is a much more sensitive and powerful detonator than mercuric fulminate [1], The properties and applications have been reviewed [2],... 

Huang JH, Wen WH, Sun YY et al (2005) Two-stage sensing property via a conjugated donor-acceptor-donor constitution application to the visual detection of mercuric ion. J Org Chem 70 5827-5832... 

Property Elemental Mercury Mercurous Chloride Mercuric Chloride Methylmercury Chloride... 

Mercurous chromate, molecular formula, properties, and uses, 6 562t Mercury (Hg), 16 31-58. See also Hg entries... 

The mercuric ion, Hg2 +, which is obtained after oxidation in the red blood cells and other tissues, is able to form many stable complexes with biologically important molecules or moieties such as sulphydryl groups. The affinity of mercury for sulphydryl groups is a major factor in the understanding of the biochemical properties of mercuric compounds, resulting in interference with membrane structure and function and with enzyme activity. 

Mercuric chloride can reduce the superoxide anion production by mouse macrophages [ 174], but this effect is probably of little toxicological significance in view of the high concentrations required and of its reversibilities. The effect has been suggested to result from loss of the reducing properties of cellular NADPH. 

Mercury fulminate (C2N202Hg) is one of the most important primary explosives. It is usually found in the form of a gray powder, is sensitive to impact and friction, and is easily detonated by sparks and flames. It is desensitized by the addition of water, but is very sensitive to sunlight. It reacts with metals in moist environments. It is created by treating a solution of mercuric nitrate with alcohol in nitric acid. Its most important explosive property is that it easily detonates after initiation.10... 

Bulk physical property tests, such as density and heating value, as well as some compositional tests, such as the Orsat analysis and the mercuric nitrate method for the determination of unsaturation, are still used. However, the choice of a particular test is dictated by (1) the requirements of the legislation, (2) the properties of the gas under study, and (3) the selection by the analyst of a suitable suite of tests to meet the various requirements. For example, judgment by the analyst is necessary whether or not a test that is applied to liquefied petroleum gas is suitable for process gas or natural gas insofar as inference from the nonhydrocarbon constituents will be minimal. 

Elemental composition Ph 74.50%, Cl 25.49%. Lead chloride may be identified by its physical properties and using x-ray analysis. An aqueous solution may he analyzed for lead hy AA, ICP and other instrumental techniques, and for chloride ion hy ion chromatography, or hy titration with a standard solution of silver nitrate or mercuric nitrate. 

The compound is analyzed in aqueous phase by cold vapor-AA or ICP/AES method (See Mercury). It also may be derivatized with an olefin or benzene in alcohol to yield the corresponding mercuration product that may be identified from physical and spectral properties and elemental analysis. An ether or alcoholic solution of the compound may be analyzed by GC/MS. The characteristic masses should be 259, 257, 256, 202, and 200. 

Later on, there was added a third principle Salt or Arsenic, but without its having added anything essential to either Sulphur or Mercury. Salt simply represents the means to achieve a Union between Sulphur and Mercury [le sel c etait simplement un moyen d union entre le soufre et le mercure] it works like a vital spirit mediating between Body and Soul.. . . Sulphur, Mercury and Salt are, in any event, only abstractions [ne sont done que des abstractions], conveniently employed in order to designate a certain group of intrinsic properties. ... 

In 1779 Peter Woulfe examined this mineral and concluded that it must contain something new. The Spar of the Germans, said he, is commonly called white tin ore.. . . This is supposed by several to be rich in tin but the Saxon mineralogists assert that it contains none. The only experiment I made with it was to digest it in a powdered state with acids, by which means it acquires a rich yellow colour, like turbith mineral [basic mercuric sulfate] the acid of salt answers best for this experiment. This is the only substance I know of which has this property (65). 

Vinyl caproate, caprylate, pelargonate, caprate, myristate, pahnitate, stearate, 10-hendecenoate (undecylenate) and oleate can be prepared in a similar manner, except that in the preparation of the pahnitate and stearate the fatty acids are added to a solution of mercuric acetate and sulfuric acid in vinyl acetate. Vinyl stearate is not redistilled, but the once-distilled product is recrystallized from acetone at 0° (3 ml. of acetone per gram of vinyl stearate). The amount of mercuric acetate employed was 2%, and the amount of 100% sulfuric acid was 0.3-0.4%, of the weight of the stearic acid. Average yields and properties of these vinyl esters are given in the table. 

T. Urbanski et al. [41] found that the silver and mercuric salts are much more sensitive to impact than nitrourea itself, but have no initiating properties. 

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