Vanadium(V) Oxide Nitrate and Chromium(VI) Oxide Nitrate

Harris, Arlo D.; Trebellas, John C.; Jonassen, Hans B.; Clemens, Donald F.; Frazier, Stephen; Sisler, Harry H.

doi:10.1002/9780470132401.ch23

Cited by 30 publications

(10 citation statements)

References 2 publications

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“…Dinitrogen pentoxide (synthesized according to Harris et al [17]) was condensed on niobium pentachloride at À180°C and the mixture was heated at 30°C in order to melt the dinitrogen pentoxide which then immediately reacted with the pentachloride. The reaction mixture was left overnight in an apparatus fitted with a pressure release valve.…”

Section: Methodsmentioning

confidence: 99%

Theoretical structural and experimental vibrational study of niobyl nitrate

Castillo

Romano

Lanús

et al. 2011

Journal of Molecular Structure

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Section: Methodsmentioning

confidence: 99%

Theoretical structural and experimental vibrational study of niobyl nitrate

Castillo

Romano

Lanús

et al. 2011

Journal of Molecular Structure

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“…Nitropyridine 4 was prepared from 4-acetylpyridine (3) as described elsewhere [18], except for minor modifications. Dinitrogen pentoxide (DNP) was prepared from dinitrogen tetroxide and ozone [25]. DNP (10.0 g, 92.6 mmol) was kept at À78 C and MeNO 2 (100 mL) was added.…”

Section: Resultsmentioning

confidence: 99%

7‐Azacinnolin‐4(1H)‐one preparation and NMR studies of tautomery

Stockmann

Primpke

Fiksdahl

2011

Journal of Heterocyclic Chem

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As part of our current investigations of nitropyridines, we hereby report the preparation of a new annulated heterocycle by C‐azo coupling. Thus, the azacinnoline, pyrido[3,4‐c]pyridazin‐4(1H)‐one (38%), was prepared from 4‐acetyl‐3‐aminopyridine via diazotization. 1H, 13C, and 15N NMR spectroscopic investigations revealed that the azacinnoline exclusively exists in the NH‐keto tautomeric form in DMSO‐d6, CD3OD, and D2O. J. Heterocyclic Chem., (2011).

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“…This may be either: a) on lab. scale, using a small scale contact reactor with chilling out of the N 2 O 5 as a solid [91], or b) on pre-pilot scale using the solvent ozonation reactor producing a ready-made solution of N 2 O 5 in dichloromethane (DCM) [72,92]. In either case, the hazardous chemicals concerned are the same -N 2 O 4 , ozone, N 2 O 5 and DCM.…”

Section: Nitration Reagentsmentioning

confidence: 99%

“…Apparatus for the preparation of N 2 O 5 on laboratory scale has been set up and commissioned. The method involves gas phase oxidation of N 2 O 4 by ozone as described in the literature [91,92]. A schematic of the apparatus is shown below, where N 2 O 4 , in a stream of oxygen, is mixed with a stream of ozone (ca.…”

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confidence: 99%

Annual Industrial Capabilities Report to Congress

Farnborough¹

2008

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The US Department of Defense requires an environmentally benign synthesis route for the manufacture of military grade trinitrotoluene (TNT) which eliminates the production of redwater arising from the sulfiting process for removing unsymmetrical trinitrotoluene isomers. QinetiQ has found that by using a novel nitrating system, N2O5 in dichloromethane, the proportion of meta-substituted nitrotoluenes can be reduced to 1.3-1.5%, instead of the 4-5% levels in current processes. Additional improvements have been made to the following di-and tri-nitration steps by using alternatives to traditional mixed (sulfuric-nitric) acid systems, namely 100% nitric acid and N2O5-sulfuric acid respectively, resulting in reduced emissions of pollutants (NOx offgas and tetranitromethane). As a result, TNT with a set point within 0.3 deg. C of the Mil. Spec. (80.2 deg. C) can be made by the QinetiQ process, without the need for sulfite washing; one recrystallization raises this figure to 80.6 deg. C. A study of the process economics has shown that the cost (at 4.5 million lb per annum scale) is not disproportionately greater than current processes.

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Vanadium(V) Oxide Nitrate and Chromium(VI) Oxide Nitrate

Cited by 30 publications

References 2 publications

Theoretical structural and experimental vibrational study of niobyl nitrate

Theoretical structural and experimental vibrational study of niobyl nitrate

7‐Azacinnolin‐4(1H)‐one preparation and NMR studies of tautomery

Annual Industrial Capabilities Report to Congress

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