Structure of 1,4-cubanediyldiammonium bis(trinitromethanide)

Area of Science:

• Crystal Engineering
• Materials Science
• Solid-State Chemistry

Background:

• The synthesis and characterization of novel energetic materials are crucial for advancements in various technological fields.
• Understanding the precise arrangement of atoms and intermolecular interactions in crystalline solids is key to predicting and controlling material properties.

Purpose of the Study:

• To elucidate the crystal structure of cubanediyldiammonium trinitromethanide.
• To investigate the hydrogen bonding network and dynamic behavior of the cubane cage within the crystal lattice.

Main Methods:

• Single-crystal X-ray diffraction was employed to determine the crystal structure.
• Analysis of crystallographic data provided information on symmetry, cell parameters, and atomic positions.
• Hydrogen bonding and molecular motion were studied through structural analysis.

Main Results:

• The crystal structure was determined to be monoclinic, space group C2/m, with specific lattice parameters.
• The cubanediyldiammonium cation and trinitromethanide anion exhibit distinct crystallographic symmetries.
• A detailed hydrogen bonding network involving 12 N--H...O bonds was observed, linking the cation to six anions.
• The cubane cage displays significant librational motion around its local threefold axis.

Conclusions:

• The crystal structure of cubanediyldiammonium trinitromethanide has been successfully determined.
• The extensive hydrogen bonding network plays a significant role in stabilizing the crystal structure.
• The observed dynamic behavior of the cubane cage provides insights into the flexibility of this structural motif in energetic materials.