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Bis(l-leucinium) hexa-chlorido-stannate(IV) dihydrate.

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Summary

This study details the crystal structure of a new tin(IV) complex with l-leucinium cations. The findings reveal specific molecular conformations and extensive hydrogen bonding networks within the crystal lattice.

Keywords:
X-ray diffractioncrystal structurehexa­chloro­stannate(IV)l-leucine

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Area of Science:

  • Inorganic Chemistry
  • Crystallography
  • Structural Chemistry

Background:

  • Understanding the structural properties of metal complexes is crucial in coordination chemistry.
  • Leucine, an essential amino acid, can form salts with metal halides, influencing crystal packing and properties.
  • Hexachlorostannate anions ([SnCl6]2-) are common in coordination chemistry, with their structures influenced by counterions.

Purpose of the Study:

  • To characterize the crystal structure of the title compound, bis(l-leucinium) hexachlorostannate dihydrate.
  • To investigate the conformational preferences of the l-leucinium cation in the solid state.
  • To analyze the hydrogen bonding interactions within the crystal lattice.

Main Methods:

  • Single-crystal X-ray diffraction was employed to determine the molecular and crystal structure.
  • Analysis of bond lengths, bond angles, and intermolecular interactions was performed.
  • Hydrogen bonding networks were visualized and analyzed.

Main Results:

  • The l-leucinium cations adopt extended conformations to maximize separation between nonpolar methyl groups and polar ammonium/carboxyl moieties.
  • An intramolecular hydrogen bond between the ammonium and carboxyl groups was observed, slightly reducing C-C-N bond angles.
  • The hexachlorostannate anion exhibits a near-regular octahedral geometry.
  • An extensive three-dimensional hydrogen bond network links all components in the crystal.

Conclusions:

  • The crystal structure of bis(l-leucinium) hexachlorostannate dihydrate has been elucidated.
  • Conformational flexibility and intramolecular hydrogen bonding play significant roles in the structure of the l-leucinium cation.
  • The formation of a robust 3D hydrogen bond network dictates the overall crystal packing.