Dicyanic Acid

Davis, Tenney L.; Blanchard, Kenneth C.

doi:10.1021/ja01381a029

Cited by 24 publications

(18 citation statements)

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“…(8) and (9) respectively: (8) (9) hydrolysis is carried out in buffered solutions, the relation of Eq. (10) is obtained: (10) Our observations are consistent with this theoretical relationship (see Fig. 4).…”

Section: Resultssupporting

confidence: 90%

Photochemical Hydrolysis of Barbitals

Otsuji¹,

Kuroda²,

Imoto³

1968

Bulletin of the Chemical Society of Japan

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The irradiation of barbital (BA) and N,N'-dimethylbarbital (DMBA) in aqueous alkaline media gave diethylacetylurea and N,N'-dimethyldiethylmalonamide respectively. On the basis of the results of kinetic studies, the above photochemical hydrolyses of BA and DMBA were shown to be an attack of the hydroxide ion on the singlet excited states of BA monoanion and DMBA respectively. Such nucleophilic reagents as amines, mercaptide, and cyanide ions retarded the photochemical hydrolyses by quenching the excited state of the substrates.

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Section: Resultssupporting

confidence: 90%

Photochemical Hydrolysis of Barbitals

Otsuji¹,

Kuroda²,

Imoto³

1968

Bulletin of the Chemical Society of Japan

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“…The failure offluoroacetate to inhibit nitrite oxidation by Nitrobacter (Table 2), although it inhibited growth of Nitrobacter, is probably to be explained on the grounds that it interfered with the mechanisms of the organisms which assimilate carbon dioxide rather than with their nitrite-oxidizing mechanisms. Nitrourea in aqueous solution decomposes to cyanate, especially under alkaline conditions (Davis & Blanchard, 1929). This probably explains why solutions of nitrourea inhibited nitrite oxidation more strongly after standing or alkali treatment ( Table 2).…”

Section: Discussionmentioning

confidence: 99%

The biochemistry of the nitrifying organisms. 5. Nitrite oxidation by Nitrobacter

Lees

Simpson

1957

Biochemical Journal

106

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Nitrobacter is an autotrophic soil bacterium that derives its entire energy supply from the reaction NO2-+ O2 = NO3-+17 kcal. Apart from the early studies of Meyerhof (1916 a, b), there has been little biochemical work done on this organism since its discovery and isolation by Winogradsky (1890, 1891). The present paper records investigations into the mechanism of niitrite oxidation by Nitrobacter. Preliminary notes on some of our results have already appeared (Lees & Simpson, 1955a, b). MATERIALS AND METHODS Growth of the organisms. Nitrobacter was obtained from an Aberdeen garden soil by serial subculture in a medium made up as follows. To 10 1. of water were added 30 g. of KH2P04, 1 g. of CaSO4, 0 5 g. of MgCl2, 0 01 g. of MnCl2, 0-2 ml. of dialysed iron (B.P.). By addition of lOM-NaOH, the pH was adjusted to 7-8, which is the optimum pH for the strain of Nitrobacter used (Lees, 1954). The solution was filtered and, after addition of the appropriate amount of NaN02, sterilized at 1200 for 20 min. This medium (medium G) was used also for the propagation of the stock cultures which provided inocula for large-scale batch cultures. For largescale batch cultures 100 ml. of the carbonate-phosphate suspension, used by Lees (1952) for the culture of Nitrosomonas, was added to each 101. of medium G before sterilization. Batch cultures were used for preparing suspensions of Nitrobacter cells suitable for biochemical study; the carbonate-phosphate suspension was added to facilitate the separation of these cells after growth. Nitrobacter, unulike Nitrosomonas, does not require a solid surface for growth, but Nitrobacter cells did adhere in some measure to the solid particles in the suspension and, in any case, were entrained by them when the cells were separated from the bulk of the medium by centrifuging.

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“…Schmidt [11] also claimed to have prepared a small amount of (HNCO) 2 by the treatment of triuret 0932-0776/02/0100-0019 $ 06.00 c 2002 Verlag der Zeitschrift für Naturforschung, Tübingen Á www.znaturforsch.com K with excess phosgene, but the presented evidence by Schmidt is questionable. Another attempt for a preparation of (HNCO) 2 by decomposition of both nitrourea and nitrobiuret in aqueous and alcoholic solutions was published by Davis and Blanchard [12] according to the following equation:…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Properties and Dimerization Study of Isocyanic Acid

Fischer

Geith

Klapötke

et al. 2002

Zeitschrift Für Naturforschung B

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Isocyanic Acid, Dimeric Isocyanic Acid Isocyanic acid was prepared in pure form by reaction of KOCN or NaOCN with stearic or oxalic acid in good yield. Identification, characterization and investigation of the thermal stability of HNCO and evidence for a possible existence of "dicyanic acid" have been studied in gas phase, liquid and solid state by vibrational and NMR spectroscopy and mass spectrometry.

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Dicyanic Acid

Cited by 24 publications

References 0 publications

Photochemical Hydrolysis of Barbitals

Photochemical Hydrolysis of Barbitals

The biochemistry of the nitrifying organisms. 5. Nitrite oxidation by Nitrobacter

Synthesis, Properties and Dimerization Study of Isocyanic Acid

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