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Title: Simple and Efficient Synthesis of Explosive Cocrystals containing 3,5-Dimethylpyrazol-1-yl-substituted-1,2,4,5-tetrazines

Journal Article · · Chemistry - A European Journal

Abstract The reaction of 3,4‐dinitropyrazole, 5‐nitrotetrazole, or 4‐nitro‐1,2,3‐triazole with 1,2,4,5‐tetrazines substituted with 3,5‐dimethylpyrazolyl (dmp) groups results in energetic cocrystals after 1 minute of reflux and cooling to room temperature in yields of 89–92 %. Hydrogen‐bonding between the dmp group to the N−H of the energetic heterocycles are the predominant interaction that stabilizes the new cocrystals. Each cocrystal packs in a different lattice structure and the cocrystals with sheet‐like and herring‐bone crystal packing orientations are less sensitive than the cocrystal with the interlocked structure. Electrostatic potential mapping helps rationalize why dmp‐substituted tetrazines readily form cocrystals, whereas more electron‐deficient pyrazolyl tetrazines do not. The calculated energetic performance of the new cocrystals approaches that of 2,4,6‐trinitrotoluene (TNT) and importantly, these materials will aid in the rational design of new cocrystalline energetic materials.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1477712
Alternate ID(s):
OSTI ID: 1405546
Report Number(s):
LA-UR-17-28237
Journal Information:
Chemistry - A European Journal, Vol. 23, Issue 65; ISSN 0947-6539
Publisher:
ChemPubSoc EuropeCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 20 works
Citation information provided by
Web of Science

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