Determination of water by means of calcium hydride

Perryman, P. W.

doi:10.1039/an9457000045

Cited by 4 publications

(2 citation statements)

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“…c Total H20 after decomposition of hydrogen peroxide to H20 and oxygen. by the reaction:6 H202 -, + '/202 (7) The oxygen evolution is followed by degassing of the solution and measuring until no further evolution is observed (about 1 hr). This procedure was found to be quantitative by analyzing aqueous solutions of hydrogen peroxide that had been titrated by standard titration techniques.…”

Section: Methodsmentioning

confidence: 99%

Reactions of hydroperoxy radicals. Liquid-phase oxidation of 1,4-cyclohexadiene

Hendry¹,

Schuetzle²

1975

J. Am. Chem. Soc.

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The autoxidation of 1,4-cyclohexadiene proceeds exclusively through a free radical chain dehydrogenation to form benzene and hydrogen peroxide. The key step is the reaction of the cyclohexadienyl radical with oxygen to give benzene and hydroperoxy (HO2•) radicals directly. Estimated Arrhenius parameters exclude other routes. The bond energy of the active carbon-hydrogen bonds in various carbon radicals correlates directly with the amount of olefin formed in competition with organic hydroperoxide upon reaction with oxygen.The formation of benzene and hydrogen peroxide from the oxidation of 1,4-cyclohexadiene1'2 is one of the few cases of dehydrogenation by a simple autoxidation process at room temperature. While this oxidation is atypical because of the thermodynamic advantage associated with benzene formation, other hydrocarbons show the same behavior at higher temperatures. Because of the potential of this reaction as a source of hydroperoxy radicals near room temperature, we have made a careful study of the reaction.

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Section: Methodsmentioning

confidence: 99%

Reactions of hydroperoxy radicals. Liquid-phase oxidation of 1,4-cyclohexadiene

Hendry¹,

Schuetzle²

1975

J. Am. Chem. Soc.

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“…Further purification was found to be unnecessary; purified dithizone was not measurably oxidized by this solvent sample, over a period of 1 month. For some experiments, the benzene was dried before use by percolation twice through fresh columns of silica gel, followed by treatment with calcium hydride (2). Water was not found in the dried product by a Karl Fischer potentiometric titration (3).…”

Section: Reagentsmentioning

confidence: 99%

Chelate-exchange titrimetry in nonaqueous solvents. II. Determination of 8-quinolinol and metal 8-quinolinates

Grey¹,

Cave²

1969

Can. J. Chem.

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Chelate-exchange titrimetry has been applied to the determination of μg amounts of some metal 8-quinolinates in benzene. The titrant was a standard solution of diphenylthiocarbazone in benzene. Accuracy and precision were good in the cases of Pb, Cu(II), Cd, Zn, and In. Very slow reaction rates made titrations of Ag and Ni impracticable, and chelate-exchange was negligible in the case of Co(II). A new titrimetric method is also shown to be precise and accurate for the determination of free 8-quinolinol in benzene; the titrant was a standard solution of Cu(NO3)2 in ethanol.

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Micro-gasometric determination of water in hydrated salts

Sirotenko

1955

Mikrochim Acta

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Determination of water by means of calcium hydride

Cited by 4 publications

References 0 publications

Reactions of hydroperoxy radicals. Liquid-phase oxidation of 1,4-cyclohexadiene

Reactions of hydroperoxy radicals. Liquid-phase oxidation of 1,4-cyclohexadiene

Chelate-exchange titrimetry in nonaqueous solvents. II. Determination of 8-quinolinol and metal 8-quinolinates

Micro-gasometric determination of water in hydrated salts

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