Abstract

Bi (NO3)3/ HNO3: An efficient nitrating agent for synthesis of 2, 4, 6, 8, 10, 12-hexanitro-2, 4, 6, 8, 10, 12-hexaazaisowurtzitane from 2, 6, 8, 12-tetraacety-4, 10-ldiformyl-2, 4, 6, 8, 10, 12-isowurtzitane

Author(s): Vahid Azizkhani, Yadollah Bayat, Ali Ramazani, Bagher Mohammadi

2, 4, 6, 8, 10, 12-hexanitro-2, 4, 6, 8, 10, 12-hexaazaisowurtzitane (HNIW), more commonly called CL-20, is a novel high-density cyclic nitramine, synthesized for use as an energetic component in propellant formulations. It is usually prepared via nitration of precursors with concentrated nitric and sulfuric acid. we report in this work for the first time synthesis of Cl-20 from nitration of 2, 6, 8, 12-tetraacety-4, 10-ldiformyl-2, 4, 6, 8, 10, 12- isowurtzitane (TADFIW) by various nitrating agents and mild reaction condition. By the use of this nitrating agent, the reaction eliminated the use of concentrated sulfuric acid and was environmental friendly. Meanwhile, the effects of reaction temperature, time and other factors on yield were studied. The structure of the compound was characterized by elemental analysis, IR, 1H NMR andMS.