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Structural Investigation of Magnesium Complexes Supported by a Thiopyridyl Scorpionate Ligand.pdf (3.75 MB)

Structural Investigation of Magnesium Complexes Supported by a Thiopyridyl Scorpionate Ligand

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journal contribution
posted on 2022-09-09, 10:25 authored by Matthew P Stevens, Emily Spray, Inigo J Vitorica-Yrezabal, Kuldip Singh, Vanessa M Timmermann, Lia Sotorrios, Fabrizio Ortu
Herein, we report the synthesis of a series of heteroleptic magnesium complexes stabilized with the scorpionate ligand tris(2-pyridylthio)methanide (Tptm). The compounds of the general formula [Mg(Tptm)(X)] (1-X; X = Cl, Br, I) were obtained via protonolysis reaction between the proligand and selected Grignard reagents. Attempts to isolate the potassium derivative K(Tptm) lead to decomposition of Tptm and formation of the alkene (C5H4N-S)2C=C(C5H4N-S)2, and this degradation was also modelled using DFT methods. Compound 1-I was treated with K(CH2Ph), affording the degradation product [Mg(Bptm)2] (2; Bptm = {CH(S-C5NH3)2}-). We analyzed and quantified the steric properties of the Tptm ligand using the structural information of the compounds obtained in this study paired with buried volume calculations, also adding the structural data of HTptm and its CF3-substituted congener (HTptmCF3). These studies highlight the highly flexible nature of this ligand scaffold and its ability to stabilize various coordination motifs and geometries, which is a highly desirable feature in the design of novel organometallic reagents and catalysts.

History

Author affiliation

School of Chemistry, University of Leicester

Version

  • VoR (Version of Record)

Published in

MOLECULES

Volume

27

Issue

14

Publisher

MDPI

issn

1420-3049

eissn

1420-3049

Acceptance date

2022-07-14

Copyright date

2022

Available date

2022-09-09

Spatial coverage

Switzerland

Language

English