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A Spin-Frustrated Azide- and Alkoxide-Bridged Heterobimetallic Mixed-Valence MnIIMnIII2NiII4 Disc with S = 17/2 or 19/2.

ABSTRACT: Seven-membered homometallic FeIII7, MnIII3MnII4 coordination clusters were previously reported to be spin-frustrated molecular discs. Herein, a mixed bimetallic and mixed-valence dicationic [MnIIMnIII2NiII4(N3)4(hmp)10](NO3)2 (12+(NO3)2) was isolated in pure form without scrambling of Ni/Mn ions. It was structurally characterized by single-crystal X-ray single-crystal diffraction. The presence of MnII ions at the center of the disc has been confirmed by EPR measurements. The magnetic studies suggest that complex 12+(NO3)2 possesses spin frustration with spin ground states S = 17/2 and 19/2, which has been studied and supported by DFT calculation. The purity of 12+(NO3)2 was confirmed by powder XRD measurements, and the ratio of Ni:Mn = 4:3 was further determined by SEM-EDX analysis.

SUBMITTER: Kumar J 

PROVIDER: S-EPMC10851383 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature

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A Spin-Frustrated Azide- and Alkoxide-Bridged Heterobimetallic Mixed-Valence Mn<sup>II</sup>Mn<sup>III</sup><sub>2</sub>Ni<sup>II</sup><sub>4</sub> Disc with <i>S</i> = 17/2 or 19/2.

Kumar Jayasree J   Tarannum Ibtesham I   Singh Saurabh Kumar SK   Mondal Kartik Chandra KC  

ACS omega 20240123 5

Seven-membered homometallic Fe<sup>III</sup><sub>7</sub>, Mn<sup>III</sup><sub>3</sub>Mn<sup>II</sup><sub>4</sub> coordination clusters were previously reported to be spin-frustrated molecular discs. Herein, a mixed bimetallic and mixed-valence dicationic [Mn<sup>II</sup>Mn<sup>III</sup><sub>2</sub>Ni<sup>II</sup><sub>4</sub>(N<sub>3</sub>)<sub>4</sub>(hmp)<sub>10</sub>](NO<sub>3</sub>)<sub>2</sub> (<b>1</b><sup><b>2+</b></sup><b>(NO</b><sub><b>3</b></sub><b>)</b><sub><b>2</b></sub>) was isolate  ...[more]

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