Related Experiment Video
Updated: Jun 21, 2026

One-pot Microwave-assisted Conversion of Anomeric Nitrate-esters to Trichloroacetimidates
Published on: January 15, 2018
High-pressure far- and mid-infrared study of 1,3,5-triamino-2,4,6-trinitrobenzene
Michael Pravica1, Brian Yulga, Sergey Tkachev
1High Pressure Science and Engineering Center and Department of Physics, University of Nevada Las Vegas, Las Vegas, Nevada 89154-4002, USA. pravica@physics.unlv.edu
Abstract:
Synchrotron infrared measurements of 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) have been performed in the far-IR and mid-IR spectral regions up to approximately 30 and approximately 40 GPa, respectively. For the far-IR experiment, no pressurizing medium was used, whereas KBr was utilized as a pressurizing medium for the mid-IR experiment. For both experiments, pressure was cycled and IR spectra were recorded at various pressures to ascertain sample survival. In the high frequency region (approximately 3000 cm(-1)) of the mid-IR spectra, the peak frequencies of the NH2 symmetric and antisymmetric vibrational modes steadily decrease with increasing pressure, indicating strengthening of intermolecular hydrogen bonding with pressure. In both experiments, no apparent phase transition was observed to the highest pressures studied.
Related Concept Videos
NMR Spectroscopy of Benzene Derivatives
¹H NMR: Complex Splitting
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied first.
¹H NMR of Conformationally Flexible Molecules: Variable-Temperature NMR
¹H NMR Signal Integration: Overview
¹H NMR of Conformationally Flexible Molecules: Temporal Resolution
Electrophilic Aromatic Substitution: Nitration of Benzene

