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Article

Expanded Ligands Based upon Iron(II) Coordination Compounds of Asymmetrical Bis(terpyridine) Domains

by
Dalila Rocco
,
Alessandro Prescimone
,
Catherine E. Housecroft
* and
Edwin C. Constable
Department of Chemistry, University of Basel, BPR 1096, Mattenstrasse 24a, 4058 Basel, Switzerland
*
Author to whom correspondence should be addressed.
Molecules 2023, 28(1), 82; https://doi.org/10.3390/molecules28010082
Submission received: 2 December 2022 / Revised: 14 December 2022 / Accepted: 20 December 2022 / Published: 22 December 2022
(This article belongs to the Special Issue Exclusive Contributions by the Editorial Board Members (EBMs) of the Inorganic Chemistry Section of Molecules)
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Abstract

The synthesis and characterization of two tritopic ligands containing a 2,2′:6′,2″-terpyridine (tpy) metal binding domain and either a 3,2′:6′,3″- or a 4,2′:6′,4″-tpy domain are detailed. The synthetic routes to these ligands involved the [Pd(dppf)Cl2]-catalyzed coupling of a boronic ester-functionalized 2,2′:6′,2″-tpy with bromo-derivatives of 3,2′:6′,3″-tpy or 4,2′:6′,4″-tpy. The 2,2′:6′,2″-tpy domains of the tritopic ligands preferentially bind Fe2+ in reactions with iron(II) salts leading to the formation of two homoleptic iron(II) complexes containing two peripheral 3,2′:6′,3″-tpy or 4,2′:6′,4″-tpy metal-binding sites, respectively. These iron(II) complexes are potentially tetratopic ligands and represent expanded versions of tetra(pyridin-4-yl)pyrazine.
Keywords: 2,2′:6′,2″-terpyridine; 3,2′:6′,3″-terpyridine; 4,2′:6′,4″-terpyridine; iron(II); expanded ligand 2,2′:6′,2″-terpyridine; 3,2′:6′,3″-terpyridine; 4,2′:6′,4″-terpyridine; iron(II); expanded ligand
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MDPI and ACS Style

Rocco, D.; Prescimone, A.; Housecroft, C.E.; Constable, E.C. Expanded Ligands Based upon Iron(II) Coordination Compounds of Asymmetrical Bis(terpyridine) Domains. Molecules 2023, 28, 82. https://doi.org/10.3390/molecules28010082

AMA Style

Rocco D, Prescimone A, Housecroft CE, Constable EC. Expanded Ligands Based upon Iron(II) Coordination Compounds of Asymmetrical Bis(terpyridine) Domains. Molecules. 2023; 28(1):82. https://doi.org/10.3390/molecules28010082

Chicago/Turabian Style

Rocco, Dalila, Alessandro Prescimone, Catherine E. Housecroft, and Edwin C. Constable. 2023. "Expanded Ligands Based upon Iron(II) Coordination Compounds of Asymmetrical Bis(terpyridine) Domains" Molecules 28, no. 1: 82. https://doi.org/10.3390/molecules28010082

APA Style

Rocco, D., Prescimone, A., Housecroft, C. E., & Constable, E. C. (2023). Expanded Ligands Based upon Iron(II) Coordination Compounds of Asymmetrical Bis(terpyridine) Domains. Molecules, 28(1), 82. https://doi.org/10.3390/molecules28010082

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