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Title: Determination of enthalpies of formation of energetic molecules with composite quantum chemical methods

Journal Article · · Chemical Physics Letters
 [1];  [1];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

We report gas-phase enthalpies of formation for the set of energetic molecules NTO, DADE, LLM-105, TNT, RDX, TATB, HMX, and PETN using the G2, G3, G4, and ccCA-PS3 quantum composite methods. Calculations for HMX and PETN hitherto represent the largest molecules attempted with these methods. G3 and G4 calculations are typically close to one another, with a larger difference found between these methods and ccCA-PS3. Furthermore there is significant uncertainty in experimental values, the mean absolute deviation between the average experimental value and calculations are 12, 6, 7, and 3 kcal/mol for G2, G3, G4, and ccCA-PS3, respectively.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1245711
Report Number(s):
LLNL-JRNL--680299
Journal Information:
Chemical Physics Letters, Journal Name: Chemical Physics Letters Journal Issue: C Vol. 648; ISSN 0009-2614
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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