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Chemical bonding in energetic materials: beta-NTO.
1Department of Chemistry, University of Toledo, Toledo, OH 43606, USA.
Summary
This study details the electron density and properties of beta-5-nitro-2,4-dihydro-3H-1,2,4-triazol-3-one (NTO) using low-temperature X-ray diffraction. The analysis reveals critical bonding information and the molecule
Area of Science:
- Crystallography
- Materials Science
- Quantum Chemistry
Background:
- The quasi-stable beta form of 5-nitro-2,4-dihydro-3H-1,2,4-triazol-3-one (NTO) is of interest for its energetic properties.
- Understanding the electron density distribution is crucial for predicting chemical behavior and stability.
Purpose of the Study:
- To determine the electron density and related properties of beta-NTO.
- To analyze the chemical bonding within the NTO molecule.
Main Methods:
- Low-temperature X-ray diffraction at 100 K using Ag Kalpha radiation.
- Hansen-Coppens multipole model implemented in the XD program for data analysis.
- Calculation of electron density, Laplacian, and electrostatic potential distributions.
Main Results:
- High-quality diffraction data were collected, yielding a low R(int) value.
- The multipole model successfully refined the crystal structure, with R = 0.0333.
- Bonding critical points and a molecular dipole moment of 3.2(1) D were determined.
Conclusions:
- The study provides a detailed charge density analysis of beta-NTO.
- The findings offer insights into the chemical bonding and electronic structure of NTO.
- This work contributes to a fundamental understanding of energetic materials.