4-Amidino-pyridinium hexa-chlorido-stannate(IV) dihydrate

Area of Science:

• Crystal chemistry
• Coordination chemistry
• Supramolecular chemistry

Background:

• Molecular salts offer unique structural motifs.
• Understanding hydrogen bonding is crucial for crystal engineering.
• Disorder in crystal structures impacts material properties.

Purpose of the Study:

• To characterize the crystal structure of 4-[amino-(iminium-yl)methyl]pyridin-1-ium hexachlorostannate(IV) dihydrate.
• To investigate the hydrogen bonding interactions within the hydrated salt.
• To analyze the crystallographic features, including molecular disorder.

Main Methods:

• Single-crystal X-ray diffraction was employed to determine the molecular and crystal structure.
• Crystallographic data were analyzed to identify atomic positions and bonding.
• Hydrogen bond analysis was performed to elucidate intermolecular interactions.

Main Results:

• The crystal structure of (C6H9N3)[SnCl6]·2H2O was successfully determined.
• The tin atom was found to reside on a crystallographic inversion center.
• The organic cation exhibited whole-molecule disorder, and a network of N-H⋯O, N-H⋯Cl, and O-H⋯Cl hydrogen bonds was identified.

Conclusions:

• The hydrated molecular salt exhibits complex intermolecular interactions.
• The identified hydrogen bonds play a significant role in stabilizing the crystal structure.
• The observed molecular disorder provides insights into crystal packing and potential polymorphism.