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Synthesis, Structural Characterization, and Magnetic Properties of Two New Fe(III)Mn(III) 1D Bimetallic Compounds
Fayoum Univ, Fac Sci, Phys Dept, Al Fayyum 63514, Egypt.;Univ Technol & Appl Sci, Rustaq Coll Educ, Sci Dept, Al Rustaq 329, Oman..
Fayoum Univ, Fac Sci, Dept Chem, Faiyum 63514, Egypt..
Fayoum Univ, Fac Sci, Phys Dept, Al Fayyum 63514, Egypt..
Fayoum Univ, Fac Sci, Phys Dept, Al Fayyum 63514, Egypt..
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2025 (English)In: ACS Omega, E-ISSN 2470-1343, Vol. 10, no 8, p. 8271-8280Article in journal (Refereed) Published
Abstract [en]

Two Fe(III)Mn(III) bimetallic compounds, [Tp*Fe (CN)3][(MnIIIsalen)]<middle dot>MeOH<middle dot>MeCN (1) and [Tp*Fe (CN)(3)][Mn(III)salphen]center dot MeOH center dot H2O (2), were prepared by assembling the tricyanometalate building block (TEA)4N [Tp*Fe(CN)3] [Tp* = hydrotris(3,5-dimethylpyrazol-1-yl)borate] and the respective Mn Schiff base precursors [salen = N,N '-ethylenebis(salicylideneiminate), salphen = N,N-bis(salicylidene)-1,2-phenylenediamine]. Both compounds exhibit a one-dimensional (1D) zigzag chain structure linked by cyanide bridges, forming a (-Fe-C N-Mn-N C-) n motif. Magnetic studies show a gradual increase of chi M T values in both complexes upon lowering temperature, indicating ferromagnetic coupling between the FeIII and MnIII metal centers with Curie-Weiss constants of +1.1 K in (1) and +1.0 K in (2). Ferromagnetic interactions are attributed to the significantly bent Mn-NC angles (148.52 and 152.99 degrees for (1) and 154.9 and 151.3 degrees for (2)). The formation of 1D chains in the presence of MeOH challenges earlier reports that linked chain formation to the absence of MeOH in the reaction medium. This finding highlights the highly sensitive nature of this reaction system to various factors, including the influence of solvents on intermolecular interactions, the coordinative properties and polarity of the solvent, the steric and electronic characteristics of the precursors, and specific reaction conditions, such as temperature, concentration, and molar ratios.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2025. Vol. 10, no 8, p. 8271-8280
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Inorganic Chemistry Physical Chemistry
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URN: urn:nbn:se:uu:diva-553169DOI: 10.1021/acsomega.4c09887ISI: 001437113700001PubMedID: 40060778Scopus ID: 2-s2.0-86000387702OAI: oai:DiVA.org:uu-553169DiVA, id: diva2:1947629
Available from: 2025-03-26 Created: 2025-03-26 Last updated: 2025-03-26Bibliographically approved

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