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Preparation of SNS CobaltII Pincer Model Complexes of Liver Alcohol Dehydrogenase

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Published on: March 19, 2020

A non-innocent pincer H

Prasenjit Sarkar¹, Chandan Mukherjee

¹Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India. cmukherjee@iitg.ac.in.

Dalton Transactions (Cambridge, England : 2003)

|September 13, 2018

Summary

This summary is machine-generated.

A novel iron(iii) complex was synthesized using a pincer non-innocent ligand. This low-spin complex features two 2-iminobenzosemiquinone π-radicals and one thiyl π-radical, showcasing unique electronic properties.

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Area of Science:

Coordination chemistry
Organometallic chemistry
Materials science

Background:

Non-innocent ligands play a crucial role in tuning the electronic properties of metal complexes.
Pincer ligands offer unique coordination environments and stability.
Iron complexes are vital in catalysis and bioinorganic chemistry.

Purpose of the Study:

To synthesize and characterize a novel iron(iii) complex with a pincer non-innocent ligand.
To investigate the electronic structure and radical character of the resulting complex.
To explore the formation mechanism involving S-S bond cleavage.

Main Methods:

Ligand synthesis and characterization.
Iron complex formation using FeCl3 and Et3N.
Spectroscopic and crystallographic analysis of the iron complex.

Main Results:

Successful synthesis of a homoleptic, six-coordinate, low-spin Fe(iii) complex (1).
The complex features a pincer non-innocent H3LONS ligand derived from H4Ldtda(AP) via S-S bond cleavage.
The electronic structure reveals the presence of two 2-iminobenzosemiquinone (1-) π-radicals and one thiyl π-radical.

Conclusions:

The study demonstrates the utility of S-S bond cleavage for generating non-innocent pincer ligands.
The resulting iron(iii) complex exhibits significant π-radical character, offering potential for electronic applications.
This work expands the scope of non-innocent ligand design in coordination chemistry.