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The Synthesis of [Sn10(Si(SiMe3)3)4]2- Using a Metastable Sn(I) Halide Solution Synthesized via a Co-condensation Technique
Published on: November 28, 2016
Dichloridobis(pyridine-2-thiol-ato-κ²N,S)tin(IV): a new polymorph
Sheyda R Ismaylova1, Zhanna V Matsulevich, Galina N Borisova
1Baku State University, Z. Khalilov St 23, Baku AZ-1148, Azerbaijan.
Summary
This study details the synthesis and crystal structure of a tin(IV) compound, [SnCl₂(C₅H₄NS)₂]. Researchers identified a new monoclinic polymorph, revealing distinct intermolecular interactions compared to a previously studied triclinic form.
Area of Science:
- Inorganic Chemistry
- Crystal Engineering
- Coordination Chemistry
Background:
- The synthesis of novel organotin compounds provides insights into coordination chemistry.
- Polymorphism in coordination compounds can significantly influence material properties.
- Understanding intermolecular forces is crucial for predicting crystal packing and stability.
Purpose of the Study:
- To synthesize and characterize a new tin(IV) complex, [SnCl₂(C₅H₄NS)₂].
- To determine the crystal structure of the monoclinic polymorph.
- To compare the structural features and intermolecular interactions with a previously reported triclinic polymorph.
Main Methods:
- Reaction of 2,2'-dipyridyl disulfide with tin tetrachloride.
- Single-crystal X-ray diffraction analysis to determine the molecular and crystal structure.
- Analysis of intermolecular interactions (hydrogen bonding, S⋯S interactions) and crystal packing.
Main Results:
- A new monoclinic polymorph of [SnCl₂(C₅H₄NS)₂] was obtained and characterized (space group C2/c).
- The tin(IV) center exhibits a distorted octahedral geometry with bidentate pyridine-2-thiolate ligands.
- Distinct intermolecular interactions, C-H⋯Cl hydrogen bonds in the monoclinic form versus S⋯S interactions in the triclinic form, dictate crystal packing.
Conclusions:
- The formation of different polymorphs is governed by variations in intermolecular forces.
- The study highlights the sensitivity of crystal structure to subtle changes in molecular assembly.
- This work contributes to the understanding of tin(IV) coordination chemistry and polymorphism.
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