ISSN:
0749-1581
Keywords:
Dinitrobenzimidazoles
;
Structure assignment
;
1H NMR
;
13C NMR
;
2D NMR
;
Solvent and temperature effects
;
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Several 1-(2′,4′,6′-trinitrophenyl)dinitrobenzimidazoles (1-picryldinitrobenzimidazoles) were synthesized as part of an ongoing study of heterocyclic nitro compounds as energetic materials and their structure-property relationships. The 1-picryl-4,6-dinitrobenzimidazoles and their 1-methyl analogs were examined by several NMR techniques in order to confirm their structures, and assignment strategies are discussed. Nuclear Overhauser enhancement (NOE) difference spectroscopy and 1H/13C correlation experiments were used to make definitive assignments of the 1H and 13C NMR spectra. It was found that both solvent and temperature had significant effects on the chemical shifts of the benzimidazole protons. This was especially true for the 1-picryl derivatives.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/mrc.1260310104
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