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Binuclear Triphenylantimony(V) Catecholates through N-Donor Linkers: Structural Features and Redox Properties
Andrey I Poddel'sky1, Ivan V Smolyaninov2, Aleksandra I Shataeva1
1G.A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, 49 Tropinina Str., 603137 Nizhny Novgorod, Russia.
Molecules (Basel, Switzerland)
|October 14, 2022
Summary
This study synthesized novel binuclear antimony(V) bis-catecholate complexes using various linker ligands. The electrochemical properties of these complexes were investigated, showing ligand-dependent redox behavior.
Area of Science:
- Organometallic Chemistry
- Coordination Chemistry
- Materials Science
Background:
- Triphenylantimony(V) catecholate complexes are versatile building blocks in coordination chemistry.
- Exploring new multinuclear antimony complexes can lead to materials with unique electronic and structural properties.
Purpose of the Study:
- To synthesize and characterize a series of binuclear triphenylantimony(V) bis-catecholate complexes.
- To investigate the structural diversity and electrochemical behavior of these novel compounds.
Main Methods:
- Synthesis of binuclear complexes via reaction of mononuclear catecholates with linker ligands (pyrazine, 4,4'-dipyridyl, bis-(pyridine-4-yl)-disulfide, diazobicyclo[2,2,2]octane).
- Single-crystal X-ray analysis to determine molecular structures.
- Electrochemical studies (cyclic voltammetry) to probe redox properties.
Main Results:
- Successful synthesis of eleven binuclear complexes (1-11), one 1D coordination polymer (12), and one macrocyclic tetranuclear compound (13).
- X-ray analysis revealed diverse spatial arrangements of mononuclear moieties.
- Electrochemical studies showed that N-donor ligands influence the electrooxidation mechanism and potentials of the catecholate ligand.
Conclusions:
- The choice of linker ligand significantly impacts the structure and electrochemical properties of binuclear antimony(V) bis-catecholate complexes.
- DABCO coordination shifts oxidation potentials cathodically, while pyrazine, Bipy, and PySSPy lead to a single multielectron redox stage.
Keywords:
N-donor linker ligandantimony(V)binuclear complexcatecholatecyclic voltammetrysingle-crystal X-rayMore Related Videos
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