Dinitropyrazoles

Crystal structure of 3,4-dinitropyrazole, C3H2N4O4

“…Recently, these so called "high energy density materials" have attracted renewed attention in conjunction with their favorable detonation performance [4,5]. As a promising candidate, 3,4-dinitropyrazole was synthesized by the nitration of pyrazole [6]. We here report the crystal structure of the title compound (Fig.…”

A DFT study on the structure‐property relationship of aminonitropyrazole‐2‐oxides

“…Kamlet-Jacob equations were used to determine the performance properties of model compounds. The performance properties of model compounds P5, P18, P20, P21, P22, and P23 are higher compared with 2, 4,6,8,10,4,6,8,10, and octanitrocubane (ONC). The heat of explosion, density, detonation velocity and detonation pressure are related to the number and positions of NO 2 and NH 2 groups in pyrazole-2-oxide.…”

1,4-Dinitro-1H-imidazoles

“…N)imidazol-1′-yl]acetic acid was obtained. The latter acid with bromine and phosphorus trichloride in anhydrous benzene formed a product that was subjected to hydrolysis to afford 2-methyl-4(5)-nitro-1H- (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15) N)imidazole in 40% yield. Starting compound 2 was also treated with ( 15 N)ammonia to produce a mixture of isotopically modified and natural nitrous oxide.…”

“…48 The products served as starting materials in syntheses of adenines. Two other compounds, the (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15) N)adenine and (1-3 H)ribose, were also prepared. The compounds were then enzymatically coupled to isotopically modified ribosyl groups to give respectively substituted adenosines (31, Figure 5).…”