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Showing 1 to 20 of 27 for “"Nitromethane"”.
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Vibrational energy transfer in condensed high explosives: Nitromethane
… and multiphonon up-pumping in a high explosive nitromethane (NM). The relationships between these energy transfer processes and shock wave-induced initiation to detonation are discussed. The principal mechanism of vibrational cooling in solid NM below 150 K is shown to be a vibrational ladder …
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Molecular dynamics simulations of pressure shocks in liquid phase nitromethane
… energy transfer processes present in liquid nitromethane (NM) under pressure shock loading conditions have been investigated by nonequilibrium molecular dynamics methods using a previously developed, fully flexible NM force field (Sorescu, D. C.; Rice, B. M.; Thompson, D. L. J. Phys. Chem. B …
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Shock compressing liquids on a tabletop microscope, with special focus on detonating nitromethane
… dissertation the shock compression of liquid nitromethane (NM), one of the simplest homogeneous condensed-phase explosives, is explored using a tabletop microscope. The shock is produced using a spatially homogenized laser to launch flyer plates, 0.5 mm diameter, 18 – 37 µm thick disks of …
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Vibrational Kerr spectroscopy
… The vibrational Kerr spectra of fluoroform and nitromethane were successfully measured with conventional Kerr techniques. The vibrational Kerr measurements were first made on the CH stretch-bend combinations of fluoroform around 7000 cm7'. The remainder of the vibrational Kerr measurements were …
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SYNTHESES AND ESTROGENICITY STUDY OF DIETHYLSTILBESTROL AND BISPHENOL-A ANALOGS AS POTENTIAL REPLACEMENT FOR BISPHENOL-A AND INVESTIGATION ON NOVEL REACTIONS INDUCED BY IODANE/QUATERNARY AMMONIUM HALIDES
… hypothesis. Iodane/quaternary ammonium halide in nitromethane was utilized to explore aromatic bromination, N-nitrosation-dealkylation, and benzoate ester formation from benzylamines. Koser's reagent was found to be a suitable iodane for aromatic bromination reaction, whereas for …
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Studies in synthetic carbohydrate chemistry: Part 1. Nitromethane cyclization of sugar polyaldehydes with a view to the synthesis of nitrocyclodextrins. Part 2. Approaches to the synthesis of 2-(R)-fluoro-daunosamine, a carbohydrate moiety for an antitumor drug.
… functionalities by base-catalyzed reaction with nitromethane according to the general principle of nitroalkane cyclization of sugar dialdehydes, leading to 3-deoxy-3-nitro heptoseptanosides, 3,3'-dideoxy-3,3'-dinitro-disaccharides, and "nitro 6-deoxy-beta-cyclodextrin", respectively. Chapter 1. …
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Theory and modeling of laser-driven flyer plate experiments to study explosives under a microscope
… for a classical reactive material, liquid nitromethane. We present a computational approach using a multi-material, arbitrary Lagrangian-Eulerian code termed ALE3D to model the nanosecond/micrometer dynamics of the launch of 0.5 - 4.5 km/s laser-driven metal flyer plates and the impact with …
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Fundamental Studies And Applications Of Strong Field Ionization
… of two polyatomic molecules (sulfur dioxide and nitromethane) were investigated. In a second study, we show the strong field ionization rate depends on the sign of the magnetic number distribution. We detect the signal of sequential double ionization of argon dications by a pump-probe method to …
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Experimental investigation of optical and electrical properties of various explosive fireballs
… such as TNT, RDX, HMX, Comp B, Tritonal, and Nitromethane were utilized to assess the effects of varied carbon content on each of the aforementioned properties. Furthermore, the ambient pressure was manipulated to alter kinetics and simulate blast scaling effects. Lastly, the ambient …
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Organophosphorus-Catalyzed Reductive Functionalization of Nitrocompounds via P(III)/P(V) Redox Couple
… reductants, nitro compounds (nitroarenes, nitromethane and nitroalkanes) undergo reductive O-atom transfer reactions involving the conversion of P(III)/P(V)=O. With that, boronic acids were employed as coupling partners to intercept the nitrene reactivity of nitro compounds derived …
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Synthesis of nitrogen-containing heterocycles using nitro compounds as building blocks: Part I: Synthesis of 3-substituted azepanes. Part II: Synthesis of 1-azoniapropellanes as phase transfer catalysts
… the nitro diketone intermediate. Starting from nitromethane and -chloropropiophenone, rapid access to 2,8-diphenyl-1-azoniapropellane and 2,8,9-triphenyl-1-azoniapropellane was accomplished .
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Optical, electronic, and dynamical phenomena in the shock compression of condensed matter
… of electronic excitations in crystalline solid nitromethane are examined under conditions of shock compression. Density functional theory calculations are used to determine the crystal bandgap under hydrostatic stress, uniaxial strain, and shear strain for pure and defective materials. In all …
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Theory of Instability and Nonlinear Evolution of Self -Sustained Detonation Waves
… characteristics of detonation in PBX-9502 and nitromethane.
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Ultrafast dynamic ellipsometry of laser driven shock waves
… in a single laser shot. Two additional liquids, nitromethane and carbon disulfide, were also investigated with UDE, and both liquids showed evidence of chemical reaction in the first 200 ps after the arrival of the shock wave. Ultrafast dynamic ellipsometry was used in conjunction with high-speed …
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2-substituted-1, 3-dioxan-5-ones : synthesis, reactions and synthetic applications
… form commercially available tris(hydroxymethyl)nitromethane, ranged from 40 to 90%. The exploration of the chemistry of 2-substituted-1,3-dioxan-5-ones was focused on carboanion chemistry of these compounds. 2-Substituted-1,3-dioxan-5-ones were shown to easily form corresponding lithium, boron …
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Bis-and tris (amidine) fluoroboron cations and related systems studies by Multinuclear NMR and fast atom bombardment mass spectometry
… bases and form DD'BF2+ and D'2BF2+ in acetone or nitromethane. Fast atom bombardment mass spectrometry is doubly meaningful to this work. Firstly, FABMS can be directly applied to the complicated fluoroboron cation containing solution systems as an excellent complementary technique to multinuclear …
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Design, synthesis and evaluation of organocatalysts in 1,4-conjugate additions to nitroolefins and alkylidene malonates
… catalysts tested. Other Michael donors, such as nitromethane and malononitrile, were also successfully employed as nucleophiles in Michael additions to ,-unsaturated diesters, with yields and enantioselectivities of up to 88% and 48% respectively. Additionally, a family of -substituted …
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The Detection and Identification of Explosives by Canines and Chemical Instrumentation
… by explosive formulations. These include nitromethane, nitroethane, 1- nitropropane, r-limonene, and toluene.
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Spectroscopic Studies of Some Semiquinone Radical Ions
… whereas, oxidation in aluminium chloride-nitromethane yields only the parent cation. Reduction of 4,4'-biphenoquinone in dideutero-sulphuric acid initially gives the 4,4'-biphenos emiquinone cation which subsequently undergoes a stepwise exchange of the protons in the 3,3',5 and 5' …
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