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A Study of the Complexation of MercuryII with Dicysteinyl Tetrapeptides by Electrospray Ionization Mass Spectrometry
Published on: January 8, 2016
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The stability of mercaptobenzothiazole based soft scorpionate complexes
Rajeev Rajasekharan-Nair1, Dean Moore, Alan R Kennedy
1Department of Pure and Applied Chemistry, WestChem University of Strathclyde , 295 Cathedral Street, Glasgow G1 1XL, U.K.
Inorganic Chemistry
|September 11, 2014
Summary
The hydrotris(mercaptobenzothiazolyl)borate (Tbz) ligand shows stability with bismuth but decomposes with mercury, antimony, and cobalt. Novel heterocycles formed with mercury and antimony, while cobalt led to ligand disintegration.
Area of Science:
- Coordination chemistry
- Organometallic chemistry
- Inorganic synthesis
Background:
- The hydrotris(mercaptobenzothiazolyl)borate (Tbz) anion is a versatile ligand.
- Understanding ligand stability with varying metal hardness is crucial in coordination chemistry.
Purpose of the Study:
- To investigate the stability of the Tbz ligand coordinated to hard and soft metal centers.
- To explore the reaction chemistry of Tbz with various metal halides.
Main Methods:
- Synthesis and characterization of metal-Tbz complexes.
- Reactions of Tbz with HgI2, SbI3, BiI3, and CoCl2.
- Spectroscopic and structural analysis of reaction products.
Main Results:
- Stable bismuth-Tbz complexes ([Bi(Tbz)I3](-)) were formed.
- Mercury and antimony complexes underwent ligand modification and decomposition, forming novel cationic pentacyclic heterocycles.
- Cobalt reactions resulted in ligand disintegration and desulfurization, yielding a benzothiazole adduct.
Conclusions:
- The Tbz ligand's stability is dependent on the nature of the coordinated metal ion.
- Complex reaction pathways involving ligand modification and decomposition were observed with specific metal ions.
- The study highlights the intricate reactivity of the Tbz ligand in coordination chemistry.
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