The present review deals with the bioactive compounds of the marine non-chordates. The potent medicinal usage of the bioactive compounds viz. steroids, terpenoids, isoprenoid and non-isoprenoid compounds, quinones, brominated compounds, nitrogen heterocyclics and nitrogen-sulphur heterocyclics from marine non-chordates have been compiled. Various literatures survey revealed that the bioactive c...

Locating pressure and temperature conditions relevant to concurrent diamond-anvil-cell (DAC) experiments is imperative for the discovery of new high–pressure nitrogen-rich compounds. In this work we provide a pressure-temperature phase diagram iron–nitrogen system pressures up 200 GPa temperatures 4000 K through combination Density Functional Theory computations thermodynamic calculations. The ...

Within the field of materials science, high-nitrogen compounds represent an important class of energetic materials. As a result of the existence of a large number of inherently energetic N N or N=N bonds within the molecules, highnitrogen compounds possess very high positive heats of formation, thereby making them intrinsically high-energy materials. The energy of most compounds with high-nitro...

The synthesis of 3-amino-1-nitroguanidine (3-ANQ) and 5-hydrazino tetrazole (5-HT) derivatives as new energetic materials are described. Reaction of 3-ANQ with triethyl orthoformate leads to the formation of 3-nitramino triazole while no reaction was observed whit 5-HT. Addition of NaN3 to a mixture of 3-ANQ and triethyl orthoformate, afforded 1-nitroguanidyl tetrazole in excelle...

1. INTRODUCTION Nitrogen-rich compounds are unique very reactive substances which have high heats of formation. Pyridine is one of the most well known aromatic cycles where a CH is replaced by a nitrogen atom, but the pyridine ring is only one member of the azine heterocycles, in which one or more CH group of benzene is replaced by π-accepting and σ-donating nitrogen atoms, proceeding from diaz...

Stabilization of copper( ii ) azide by application various nitrogen-rich azole ligands resulted in a series powerful energetic coordination compounds with desired properties for primary explosives.

Direct reaction between nitrogen and tantalum at approximately 100 GPa results in the energetic nitrogen-rich compounds TaN4 TaN5, which feature N4 chains unprecedented branched single-bonded polymeric crystal structures, respectively. TaN5 possesses an extraordinary volumetric energy density of 18 kJ cm−3, exceeding well-known high-energy-density materials.

Stable structures and stoichiometries of binary Mg−N compounds are explored at pressures from ambient up to 300 GPa using ab initio evolutionary simulations. In addition to Mg3N2, we identified five nitrogen-rich compositions (MgN4, MgN3, MgN2, Mg2N3, and Mg5N7) and three magnesium-rich ones (Mg5N3, Mg4N3 and Mg5N4), which have stability fields on the phase diagram. These compounds have peculia...

Nitrogen rich compounds are suitable as ingredients in low smoke propellant charges. Several high-N energetic materials are presented which are based on tetrazoles. Tetrazoles are an unique class of compounds, since they combine a high nitrogen content and a high heat of formation with good thermal and kinetic stabilities due to their aromatic ring system. The reaction of 5azidotetrazole with h...