The synthesis, physical properties, and calculated performances of six stereo- regioisomeric cyclobutane nitric ester materials are described. While the these isomers, as expected, were similar, their properties found to be extremely different. By alteration regiochemistry, complete tunability in form low- or high-melting solids, stand-alone melt-castable explosives, explosive eutectic compounds, liquid propellant was obtained. This demonstrates that theoretical calculations should not main...

Discussed herein is the synthesis of bis(1,2,4-oxadiazole)bis(methylene) dinitrate, determination its crystal structure by X-ray diffractometry, calculations explosive performance, and sensitivity measurements. Steps taken to optimize process improve yields dinitrate are also discussed. Bis(1,2,4-oxadiazole)bis(methylene) has a calculated detonation pressure 50% higher than that TNT. The compound exhibits relatively high decomposition temperature rarely observed for nitrate-based compounds....

Despite their favorable properties, azetidines are often overlooked as lead compounds across multiple industries. This is attributed to the challenging synthesis of densely functionalized in an efficient manner. In this work, we report scalable and characterization seven with varying regio- stereochemistry application novel azetidine-based energetic materials, enabled by visible-light-mediated aza Paternò-Büchi reaction. The performance stark differences physical properties these new make...

Aluminum single crystals cut in the 〈111〉 direction were implanted with 2\ifmmode\times\else\texttimes\fi{}${10}^{20}$ ${\mathrm{m}}^{\mathrm{\ensuremath{-}}2}$ ${\mathrm{Pb}}^{+}$ ions at 75 or 150 keV. The insoluble lead precipitated as epitaxially oriented crystallites aluminum matrix. precipitates studied by x-ray diffraction Riso?, DESY, and Brookhaven National Laboratory, showed large superheating well supercooling during repeated heating cycles. as-implanted had a characteristic size...

Abstract The synthesis and crystal structure of the heterocyclic explosive bis(nitroxymethylisoxazolyl) furoxan, C 10 H 6 N O , are described. In addition, we report its physical properties theoretical performance. This material was found to exhibit standalone melt‐castable properties, with a melting point 89.8 °C an onset decomposition temperature 193.8 °C. Bis(nitroxymethylisoxazolyl) furoxan features insensitive behavior impact, friction, electrostatic discharge, calculated detonation...

Abstract The efficient and scalable synthesis of 3,3′‐bis‐isoxazole‐5,5′‐bis‐methylene dinitrate its energetic properties are described. material has favorable sensitivity properties; point toward potential as both a melt‐castable secondary explosive propellant plasticizer.

The efficient and scalable synthesis of 3,3′‐biisoxazole‐4,4′,5,5′‐tetrakis(methyl nitrate) its energetic properties are described. features a metal‐free [3+2] cycloaddition an electron‐rich internal alkyne nitrile oxide by simple heating, without using halogenated solvents. material has favorable sensitivity properties, point toward potential as nitrate plasticizer highly explosive material.

Abstract A scalable synthesis of bis(1,2,4‐oxadiazoyl) furoxan, C 6 H 2 N O 4 , its physical properties, and theoretical performance values are described. Previous attempts to synthesize this compound required expensive reagents, and/or time‐consuming processes low overall yields. In addition disclosing a streamlined bis(1,2,4‐oxadiazolyl) we report molecular configuration crystal structure, as well correct melting point. Bis(1,2,4‐oxadiazolyl) furoxan exhibits very insensitive behavior...

Waugh and Ferrazzano¹and Berkman Miles²recently reported a new method of treatment fractures the metacarpals, exclusive thumb. This consists in reducing fracture, pushing Kirschner wire through fragment then running on into adjacent metacarpal, thus fixing loose fragment. There is no reason why this same principle cannot be used for metacarpal thumb, particularly Bennett type fracture involving base As textbooks medical journals as far known have not described technic,...

The design of a scalable, safe, and robust route to promising energetic material containing cyclobutane four nitric ester groups is described. This includes streamlined preparation linear precursor, the use safe methods for tetraester reduction nitration, translation small-scale batch electrochemical oxidative cyclization forge continuous flow setup capable producing quantities more than 100 g in single run. In principle, this scale was limited only by space considerations an academic lab,...

A safer, convenient, cost-effective, and scalable synthesis for 3,4-dicyanofuroxan (C4N4O2) is described. Dropwise treatment of a well-stirred suspension cyanoacetic acid in dichloromethane with concentrated mixed (HNO3/H2SO4) affords dicyanofuroxan 72% yield 84% purity after liquid chromatography analysis. Single crystal X-ray diffraction studies further confirm the product its molecular conformation packing. During dropwise addition acid, self-heating occurs, this event necessary reaction...

Ion implantation of xenon into single-crystal magnesium oxide results in the formation solid, crystalline inclusions. These inclusions have been investigated by transmission electron microscopy and selected-area diffraction. The solid could be divided two categories: those that were epitactically aligned with matrix randomly oriented. at room temperature indicates they under a high pressure. This pressure was calculated to \ensuremath{\sim}0.4--0.6 GPa.

Scalable synthesis of amidoxime 1 by nucleophilic addition 50% aq. NH2OH to 3-hydroxypropionitrile is reported. In the presence hydroxyl and moieties, this dually functional compound can be manipulated for heterocyclic compounds that may useful energetic materials pharmaceutical chemistry communities. preparing 1, it was discovered previously published procedures were either irreproducible and/or processes not practical on larger scales. Previously required flash chromatography afforded...

The behavior of lead atoms implanted at 150 keV into (110) aluminum single crystals is studied by Rutherford backscattering (RBS) and a channeling technique. Channeling observed for the Pb signal in as-implanted samples implantation fluences region 1\ifmmode\times\else\texttimes\fi{}${10}^{15}$--3.1\ifmmode\times\else\texttimes\fi{}${10}^{16}$ ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}2}$ ascribed to formation nanometer-sized inclusions growing topotaxy (epitaxy three dimensions) within Al...

High-pressure experiments on metallic thallium have been carried out using a diamond-anvil cell for pressures up to 32 GPa. A hexagonal close packed → face-centred cubic (f.c.c.) phase change takes place around 4 Fitting of the experimental data Murnaghan and Birch equations state has used obtain values bulk moduli their pressure derivatives two phases. Extrapolation high-pressure f.c.c. low an estimate about 0.23 GPa in nanosized metastable inclusions formed aluminium by ion implantation.

Abstract The synthesis of 3‐(1,2,4‐oxadiazolyl)‐5‐nitratomethyl isoxazole (C 6 H 4 N O 5 ), its physical properties, and theoretical performances are described. This energetic material was found to have a melting point range 76.6–79.2 °C, thermal onset decomposition temperature 184.5 °C. These features put this into the standalone melt‐castable explosive class. TNT performance, be insensitive impact, friction, electrostatic discharge, despite having nitric ester functionality. A critical...