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Summary

This study details the crystal structure of a hydrated tin(IV) salt, revealing interactions between organic cations, inorganic anions, and water molecules through hydrogen bonds and π-π stacking.

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Area of Science:

  • Inorganic Chemistry
  • Crystallography
  • Supramolecular Chemistry

Background:

  • Tin(IV) hexachloroantimonate complexes are of interest due to their diverse structural and chemical properties.
  • Understanding the intermolecular interactions in hydrated salts is crucial for predicting their solid-state behavior and potential applications.

Purpose of the Study:

  • To elucidate the crystal structure of the hydrated title salt, (C10H8NO2)2[SnCl6]·2H2O.
  • To investigate the nature and extent of intermolecular interactions, including hydrogen bonding and π-π stacking, within the crystal lattice.

Main Methods:

  • Single-crystal X-ray diffraction was employed to determine the three-dimensional crystal structure.
  • Analysis of the crystal structure involved identifying hydrogen bond donors and acceptors, as well as non-covalent interactions like π-π stacking and C-Cl···π interactions.

Main Results:

  • The tin(IV) atom in the [SnCl6]2- anion is located at a center of inversion, exhibiting octahedral geometry.
  • The crystal structure is stabilized by a network of O-H···O, N-H···O, and O-H···Cl hydrogen bonds involving the organic cation, the hexachlorostannate anion, and water molecules.
  • Weak π-π stacking between adjacent organic cations and C-Cl···π interactions were also observed, contributing to the overall crystal packing.

Conclusions:

  • The crystal structure of the hydrated title salt is characterized by extensive hydrogen bonding networks and supplementary non-covalent interactions.
  • These interactions dictate the self-assembly and stability of the crystal lattice, offering insights into the solid-state chemistry of tin(IV) salts with organic counterions.