2-Amino-5-nitro-pyridinium hydrogen selenate

Area of Science:

• Crystallography
• Solid-state chemistry
• Hydrogen bonding

Background:

• Understanding the crystal structure of novel compounds is crucial for materials science.
• Hydrogen bonding plays a significant role in the self-assembly of molecular structures.
• The hydrogen selenate anion (HSeO4-) is an interesting component in crystal engineering.

Purpose of the Study:

• To elucidate the crystal structure of the title compound, C(5)H(6)N(3)O(2) (+)·HSeO(4) (-).
• To investigate the hydrogen bonding interactions within the crystal lattice.
• To describe the network architecture formed by cations and anions.

Main Methods:

• Single-crystal X-ray diffraction was employed to determine the atomic arrangement.
• Analysis of hydrogen bonding geometry (O-H⋯O, N-H⋯O, C-H⋯O) was performed.
• The crystal packing and network formation were visualized and described.

Main Results:

• The asymmetric unit contains two independent cations and two independent anions.
• Two distinct chains of hydrogen selenate anions run along the a-axis, connected by O-H⋯O hydrogen bonds.
• Cation ribbons, linked by N-H⋯O hydrogen bonds, extend along the b-axis and interact with anions via N-H⋯O and C-H⋯O bonds, forming a 3D network.

Conclusions:

• The title compound exhibits a complex three-dimensional supramolecular network.
• Hydrogen bonding is the primary driving force for the observed crystal structure.
• The detailed structural analysis provides insights into the packing and interactions in hydrogen selenate salts.