Fulminate

The decomposition kinetics of mercury fulminate [725] are significantly influenced by ageing, pre-irradiation and crushing these additional features of reaction facilitated interpretation of the observations and, in particular, the role of intergranular material in salt breakdown. Following a slow evolution of gas ( 0.1%) during the induction period, the accelerator process for the fresh salt obeyed the exponential law [eqn. (8)] when a 0.35. The induction period for the aged salt was somewhat shorter and here the acceleratory process obeyed the cube law [eqn. (2), n = 3] and E = 113 kj mole-1. 

Singh and Palkar [726] identified an initial deceleratory reaction in the decomposition of silver fulminate. This obeyed first-order kinetics (E = 27 kJ mole-1) and overlapped with the acceleratory period of the main reaction, which obeyed the power law [eqn. (2), n = 2] with E = 119 kj mole-1. The mechanism proposed included the suggestion that two-dimensional growth of nuclei involved electron transfer from anion to metal. 

Boddington and Iqbal [727] have interpreted kinetic data for the slow thermal and photochemical decompositions of Hg, Ag, Na and T1 fulminates with due regard for the physical data available. The reactions are complex some rate studies were complicated by self-heating and the kinetic behaviour of the Na and T1 salts is not described in detail. It was concluded that electron transfer was involved in the decomposition of the ionic solids (i.e. Na+ and Tl+ salts), whereas the rate-controlling process during breakdown of the more covalent compounds (Hg and Ag salts) was probably bond rupture. 

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Initiators. Explosives such as mercury fulminate and certain metallic azides which are extremely sensitive to mechanical shock, and are accordingly used in small quantities in detonators to initiate the explosion of larger masses of less sensitive material. 

Do not heat the silver solution or allow it to stand even for a few hours, since explosive silver fulminate may be formed. The ammoniacal solution of silver nitrate is prepared by treating 3 ml. of 0-lN silver nitrate solution with very dilute ammonia solution dropwise until the precipitate which is first formed just redissolves. 

HONC fulminic acid H2P2H2OS diphosphonic acid... 

Ereezing salt, see Sodium chloride Eulminating mercury, see Mercury fulminate... 

Mercury Acetylenic compounds, chlorine, fulminic acid, ammonia, ethylene oxide, metals, methyl azide, oxidants, tetracarbonylnickel... 

FLUORINECOMPOUNDS,ORGANIC - INTRODUCTION] (Volll) Mercuric fulminate [20820-45-5]... 

Mercury Fulminate. Mercury fulminate [628-86 ] Hg(CNO)2, slowly decomposes when stored at elevated temperature. Although... 

Explosives. Mercury, in the form of organic complexes, eg, mercury fulminate [628-86-4] has had long usage in explosives (see Explosives and propellants). In the United States all mercury for use in explosives is diverted to military uses. An explosive based on mercuric 5-nitrotetra2ole [60345-95-1] has been developed, but its use is on a small scale and in research and development only (3). 

Bihmbin oxidase [80619-01 -8] derived from Mjrothecium verrucaria was modified with polyethyleneglycol when this conjugate was injected intravenously to jaundiced rats, the plasma bihmbin dropped to normal levels. This approach might have potential in the treatment of hyperbihmbinemia, fulminant hepatitis, and neonatal bihmbin encephalopathy (177). 

Thermolysis of 4-methyl(4-phenyl)isoxazolin-5-one produced a-cyanophenylacetic acid <67JHC533). The pyrolysis of 3-methylisoxazoline-4,5-dione 4-oxime generated fulminic acid, which was trapped in a liquid N2 cooled condenser for further study. Pyrolysis of metal salts such as Ag or Na produced the corresponding highly explosive salts of fulminic acid 79AG503). Treatment of the oxime with amines generated bis-a,/3-oximinopropionamides (Scheme 65) <68AC(R)189). 

Isoxazole was first synthesized by Claisen in 1903 from propargylaldehyde diethyl acetal and hydroxylamine (03CB3664). It has also been obtained by addition of fulminic acid to acetylene in methanol-dilute sulfuric acid solution, by acidic hydrolysis of 5-acetoxyisoxazo-line, by reaction of /S-chloroacrolein or/3-alkoxyacrolein with hydroxylamine hydrochloride... 

HC(17)1, p. 53), and by retro-Diels-Alder reaction of the adduct from norbornadiene and fulminic acid <67AG(E)456). 

Isoxazole-3-carbaldehyde has been obtained as a minor product from the reaction of acetylene with a mixture of nitric oxide and nitrogen dioxide (61JOC2976). Although 3-aryl-4-formylisoxazoles have been synthesized in good yields from the reaction of benzonitrile Af-oxides with 3-(dimethylamino)-2-propen-l-one (71S433), the parent member of the series, isoxazole-4-carbaldehyde, has never been reported. It may possibly be obtained by the addition of fulminic acid to 3-(dimethylamino)-2-propen-l-one. 

Isoxazole-5-carbaldehyde was prepared by the manganese dioxide oxidation of 5-hydroxymethylisoxazole (67T4697), the latter being formed from sodium fulminate and propargyl alcohol in greater than 90% yield. 

Acetylene, fulminic acid (produced in ethanol - nitric acid mixtures), ammonia Acetic acid, acetone, alcohol, aniline, chromic acid, hydrocyanic acid, hydrogen sulphide, flammable liquids, flammable gases, or nitratable substances, paper, cardboard or rags Inorganic bases, amines Silver, mercury... 

Glycerol, ethylene glycol, benzaldehyde, sulphuric acid Acetylene, oxalic acid, tartaric acid, fulminic acid (produced in ethanol-nitric acid mixtures), ammonium compounds See alkali metals (above)... 

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