Rediscovering N‐Methyltetranitropyrrole – A Versatile High Energy Material via Facile Two‐step Eco‐friendly Synthetic Approach

Abstract

A highly efficient 2-step method, where three nitro groups could be directly introduced upon pyrrole moiety in a single step, was developed as an environmentally benign process for the synthesis of N-methyltetranitropyrrole (1) employing metal nitrate/conc. sulphuric acid as the nitrating reagent. This method resulted 1 in high purity having higher thermal stability (273 °C) along with reduced sensitivity (impact sensitivity > 40 J; fricition sensitivity > 360 N), which makes it a versatile high energy material. An over-oxidized new product 1-methyl-3,3,4,4-tetranitropyrrolidine-2,5-dione (4) was also isolated during optimization, whose energetic properties are similar to those of RDX.

Energetic multifunctionalized nitro/nitramino isomeric pyrazole–tetrazole hybrids: enhancing density and detonation properties through hydrogen bonding and π–π interactions

“…27.jRef. 33.kNote 1: densities used for EXPLO calculations were measured values obtained via pycnometry; note 2: the IS and FS values were obtained using powder samples.…”