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Pyridinium Perchlorate

Can be detonated on impact, but is normally considered a stable intermediate (mp, 288°C), suitable for purification of pyridine.1 Occasionally explosions have occurred when the salt was disturbed,2 which have been variously attributed to the presence of ethyl perchlorate, ammonium perchlorate, or chlorates. A safer preparative modification has been described.3 It explodes on heating to above 335°C, or at a lower temperature if ammonium perchlorate is present.4 [Pg.522]

Perchlorate dusts and solutions irritate the skin, eyes, and respiratory system. They are also irritating and harmful if taken internally.5 [Pg.522]

Metals. This salt may explode violently in contact with metals.6 [Pg.522]

Wear eye protection, laboratory coat, and nitrile rubber gloves. Cover spill with a 1 1 1 mixture by weight of sodium carbonate or calcium carbonate, clay cat litter (bentonite), and sand.7 Dampen with water. Using a plastic scoop, cautiously transfer to a large bucket of water diluting to a concentration of less than 5%. In the fume hood, slowly and cautiously neutralize with 10% sodium hydroxide. When reaction has ceased and solids have settled, decant liquid into the drain with at least 50 times its volume of water. Solid residue may be discarded with normal refuse.7,8 Spill site should be washed thoroughly to remove all oxidant.5 [Pg.522]

Wear eye protection, laboratory coat, and nitrile rubber gloves. Work in the fume hood. Carefully add solid to a large volume of water in a beaker diluting to a concentration of less than 5%. Cautiously neutralize with 10% sodium hydroxide. Flush solution down the drain with at least 50 times its volume of water.8 [Pg.522]


Pyridinium perchlorate, 2,6-dimethoxy-l-methyl-kinetic data, 2, 198 <74JOC3481>... [Pg.52]

Pyridinium perchlorate, 1,2,4,6-tetramethyl-kinetic data, 2, 198 (74JOC3481)... [Pg.52]

Some rare-earth fluoride samples had been wet-ashed incompletely with the three mixed acids and some gave low results. These samples, now containing pyridine, were reprocessed by addition of more acids and slow evaporation on a hot-plate. One of the samples frothed up and then exploded violently. Pyridinium perchlorate seems likely to have been involved. [Pg.1361]

Poly(dimercuryimmonium perchlorate), 4012 Pyridinium perchlorate, 1863 Tetraethylammonium perchlorate, 3088 Tetrafluoroammonium perchlorate, 3986 N. N. N. A-Tctramcthv 1 formam idinium perchlorate, 2026 Triaminoguanidinium perchlorate, 0515 Trimethylammonium perchlorate, 1322 Trimethylhydroxylammonium perchlorate, 1323 Tri(4-tolyl)ammonium perchlorate, 3824 Uronium perchlorate, 0491... [Pg.325]

Table 9 Relative Rates and Partial Rate Factors for the Bromination of some Pyridinium Perchlorates with Hypobromous Acid in Perchloric Acid at 25 °C... Table 9 Relative Rates and Partial Rate Factors for the Bromination of some Pyridinium Perchlorates with Hypobromous Acid in Perchloric Acid at 25 °C...
Anodic cyclization of N-(2-pyridyl)thiobenzamide to 2-phenyl-l,2,4-thiadi-azolo[2,3-a]pyridinium perchlorate (80% yield) occurred with N—S and not with C—N bond formation as expected by analogy to the chemical oxidation of structurally similar heterocyclic thiocarboxamides.169... [Pg.283]

The anodic oxidation of 10-phenylphenothiazine in CH3CN-Et4NC104 solution of pyridine gives rise to the formation of JV-[3-(10-phenylphenothia-zinyl)]pyridinium perchlorate, the parent compound, and pyridinium perchlorate.274 On the basis of kinetic determinations a half-regeneration mechanism was proposed. [Pg.305]

Eastham and Derwent474 have also studied the kinetics of the perchloric acid-catalyzed reaction of ethylene oxide with pyridine. In excess of pyridine the rate was found to be dependent on the Conor Titrations of ethylene oxide and perchloric add. Addition of stronger bases,. g. ammonia, triethylamine, or benzylamiae, depressed the vum of cleavage, presumably by competing with ethylene oxide for thr-available proton source, believed to be pyridinium perchlorate in this case. Other acids examined included nitric acid and hydroiodie irireaction rate depended to a certain extent... [Pg.169]

Pyridinium perchlorate formed during purification of pyridine with HC104 is known to explode vio-lently (Ref 66)... [Pg.433]

Imidazo[ 1,2-a]pyridinium perchlorate, 1,2-dimethyl-Friedel-Crafts reaction, 5, 612 Imidazo[l,2-a]pyridinium salts, 1-alkyl-synthesis, 5, 631... [Pg.662]

From the analogy with epoxide determination, we can assume that, despite the less polar medium in copolymerization, the rate of reaction (11) is high at elevated temperatures and that the reaction proceeds irreversibly. Therefore, pyridinium perchlorate, an ammonium salt with protonized nitrogen, does not initiate copolymerization but addition to the epoxy group occurs 56). [Pg.103]


See other pages where Pyridinium Perchlorate is mentioned: [Pg.662]    [Pg.612]    [Pg.615]    [Pg.1362]    [Pg.184]    [Pg.190]    [Pg.45]    [Pg.110]    [Pg.136]    [Pg.645]    [Pg.436]    [Pg.391]    [Pg.239]    [Pg.699]    [Pg.702]   
See also in sourсe #XX -- [ Pg.522 ]

See also in sourсe #XX -- [ Pg.54 ]




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2- Methyl-4-phenylpyrido pyridinium perchlorate

Oxazolo pyridinium perchlorates

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