Nitrites nitrous acid

In preparing an aqueous sol ution of a diazonium salt, such as benzene-diazonium chloride, it is usual to dissolve the amine in a slight excess (about 2 2 molecular equivalents) of dilute hydrochloric acid (or alternatively to dissolve the crystalline amine hydrochloride in i 2 equivalents of the acid) and then add an aqueous solution of a metallic nitrite. Nitrous acid is thus generated in situ, and reacts with the amine salt to give the diazonium compound. For a successful preparation of an aqueous solution of the diazonium salt, however, two conditions must always be observed ... [Pg.183]

Methyl nitrite Nitrous acid, methyl ester (8,9) (624-91-9) Acetonitrile, 2-tgrt-butoxycarbonyloxyimino-2-phenyl- (8) Benzeneacetonitrile, a -[[[(1, l-dimethylethoxy)carbonyl]oxy]imino]-(9) (58632-95-4)... [Pg.187]

Isoamyl nitrite Nitrous acid, isopentyl ester (8) Nitrous acid, 3-methylbutyl ester (9) (110-46-3)... [Pg.187]

Butyl nitrite Nitrous acid, butyl ester (8,9) (544-16-1)... [Pg.187]

Sodium nitrite Nitrous acid, sodium salt (8, 9) (7632-00-0)... [Pg.30]

V-Nitrosopyrrolidine. Pyrrolidine, 1-nitroso- (8,9) (930-55-2) Ethyl nitrite Nitrous acid, ethyl ester (8,9) (109-95-5)... [Pg.121]

Nitropropanal dimethyl acetal Propane, 1,1-dimethoxy-3-nitro- (10) (72447-81-5) Sodium nitrite Nitrous acid sodium salt (8,9) (7632-00-0)... [Pg.248]

Another illustrative example deals with acid dependence of the reactions involving nitrite/nitrous acid that in its redox reactions utilizes several different mechanisms. [Pg.392]

NITRITES, NITROUS ACID (HN02), AND NITROUS ANHYDRIDE (N,Os)... [Pg.242]

Sodium metaperiodate Periodic acid, sodium salt (7790-28-5), 75, 108 Sodium nitrite Nitrous acid, sodium salt (7632-00-0), 75, 37 77, 237 Sodium omadine See Sodium 2-pyridinethiol-1 -oxide, 75, 125 Sodium 2-pyridinethiol-1-oxide (sodium omadine), 75, 125 Sodium sulfide, 76, 95... [Pg.169]

An enhancement of nitrophenol formation has, for instance, been observed upon irradiation of dissolved Fe(III) and nitrite/nitrous acid, when compared with NO2VHNO2 alone [85]. If the solution pH is sufficiently acidic to allow the existence of the photoactive Fe(III) species FeOH2+, UV photolysis yields hydroxyl [86] that can oxidise nitrite to nitrogen dioxide (reaction 20) ... [Pg.232]

The formation of nitrite/nitrous acid upon nitrate UV irradiation has been the object of some attention also because the photochemical treatment of nitrate-containing water might result in nitrite concentration above the permitted levels. However, for a reasonable initial concentration of nitrate, the limit values of nitrite are extremely unlikely to be reached [32,100,111,112]. [Pg.236]

SYNS ISOAMYL NITRITE ISOPENTYX ALCOHOL NITRITE 3-METHYLBUTANOL NITRITE 3-METHYLBUTVL NITRITE NITROUS ACID-3-METHYL BUTYL ESTER VAPOROLE... [Pg.793]

SYNS NICKEL DINITRITE NICKEL NITRITE NITROUS ACID, NICKEL(2+) SALT... [Pg.991]

The first experiment is a synthesis of 4-chlorotoluene. p-Toluidine is dissolved in the required amount of hydrochloric acid, two more equivalents of acid are added, and the mixture cooled in ice to produce a paste of the crystalline amine hydrochloride. When this salt is treated at 0-5°C with one equivalent of sodium nitrite, nitrous acid is liberated and reacts to produce the diazonium salt. The excess hydrochloric acid beyond the two equivalents required to form the amine hydrochloride and react with sodium nitrite maintains acidity sufficient to prevent formation of the diazoamino compound and rearrangement of the diazonium salt. [Pg.395]

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