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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
Four coordinate tin complexes: synthesis, characterization, thermodynamic and theoretical calculations
1Faculty of Chemistry, Kharazmi University, Tehran, Iran.
Summary
This study synthesized novel tin(IV) complexes using N,N'-bis(salicylidene)-2-aminobenzylamine ligands. Spectroscopic and computational methods revealed trends in their formation constants, influenced by substituents and tin-alkyl groups.
Area of Science:
- Inorganic Chemistry
- Coordination Chemistry
- Organometallic Chemistry
Background:
- Tin(IV) complexes are crucial in various chemical applications.
- Ligand design significantly impacts the properties of metal complexes.
- Understanding structure-property relationships is key for developing new materials.
Purpose of the Study:
- To synthesize and characterize novel tin(IV) complexes.
- To investigate the influence of substituents on ligand structure and complex stability.
- To explore the electronic and structural properties using computational methods.
Main Methods:
- Synthesis of tin(IV) complexes with varying substituents (5-OMe, 5-H, 5-NO2, 5-Br).
- Characterization using UV-Vis, FT-IR, NMR (1H, 13C, 119Sn) spectroscopy, mass spectrometry, and elemental analysis.
- Determination of thermodynamic formation constants spectrophotometrically.
- Density Functional Theory (DFT/B3LYP) calculations for structural and electronic analysis.
Main Results:
- Successful synthesis and full characterization of four new tin(IV) complexes.
- Established trends in thermodynamic formation constants: 5-OMe > 5-H > 5-NO2 > 5-Br and Ph2SnCl2 > Me2SnCl2 > n-Bu2SnCl2.
- DFT calculations provided insights into the optimized geometries, vibrational frequencies, and NMR resonances.
Conclusions:
- The electronic nature of substituents on the salicylidene ring influences the stability of tin(IV) complexes.
- The alkyl groups attached to tin also play a significant role in complex formation.
- Computational studies complement experimental data, aiding in the understanding of complex structures and properties.
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