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Authors: Gamer, Christoph
Sundaresan, Sriram
Carrella, Luca M.
Rentschler, Eva
Title: Single- vs double-decker copper 12-MC-4 metallacrown using the coordination flexibility of a soft donor ligand
Online publication date: 2-Feb-2023
Year of first publication: 2022
Language: english
Abstract: 2-Methylmercaptobenzohydroxamic acid (mmbHA) has been synthesized and used to form {CuIICl2(MeOH)[12-MCCu(II)N(mmbHA)-4]}2 ⋅ 4MeOH (1) and {CuII(μ2-ClO4)(MeOH)2(py)4[12-MCCu(II)N(mmbHA)-4]}ClO4 (2), a copper(II) based double-decker and a discrete metallacrown (MC) system, respectively. While 1 forms in the absence of a coordinating co-ligand, the presence of pyridine (Py) leads to a change in the coordination mode of mmbHA and a discrete MC 2 is formed. Both compounds have been structurally and magnetically characterized. The magnetic susceptibility measured from 2–300 K shows overall antiferromagnetic exchange coupling within both crown structures and the obtained coupling constants are J1=−88.0(1) cm−1and J2=−64.7(3) cm−1 for 1 and J1=−90.0(5) cm−1 and J2=−31.1(1) cm−1 for 2. However, the ratio of the coupling parameters is highly affected by the structural change.
DDC: 540 Chemie
540 Chemistry and allied sciences
Institution: Johannes Gutenberg-Universität Mainz
Department: FB 09 Chemie, Pharmazie u. Geowissensch.
Place: Mainz
Version: Published version
Publication type: Zeitschriftenaufsatz
Document type specification: Scientific article
License: CC BY-NC-ND
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Journal: European journal of inorganic chemistry
Pages or article number: 202200261
Publisher: John Wiley & Sons, Ltd
Publisher place: Weinheim
Issue date: 2022
ISSN: 1099-0682
Publisher DOI: 10.1002/ejic.202200261
Appears in collections:DFG-491381577-H

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