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Crystals 2018, 8(12), 447; https://doi.org/10.3390/cryst8120447

Tetramer Compound of Manganese Ions with Mixed Valence [MnII MnIII MnIV] and Its Spatial, Electronic, Magnetic, and Theoretical Studies

1
Centro de Química, Instituto de Ciencias, Universidad Autónoma de Puebla, Edif. IC9, CU, San Manuel, Puebla, Pue. 72570, Mexico
2
Instituto Politécnico Nacional, Departamento de Física, ESFM, Av. Instituto Politécnico Nacional S/N, Edif. 9, U.P. Zacatenco, Col. San Pedro Zacatenco, CDMX 07738, Mexico
*
Authors to whom correspondence should be addressed.
Received: 13 November 2018 / Revised: 23 November 2018 / Accepted: 23 November 2018 / Published: 28 November 2018
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Abstract

Using different spectroscopic techniques and computational calculations, we describe the structural and electromagnetic relationship that causes many interesting phenomena within a novel coordination compound with mixed valence manganese (II, III and IV) in its crystal and powder state. The novel compound [MnII MnIII MnIV(HL)2(H2L)2(H2O)4](NO3)2(H2O) 1 was obtained with the Schiff base (E)-2-((2-hydroxybenzylidene)amine)-2-(hydroximethyl)propane-1,3-diol, (H4L), and Mn(NO3)2.4H2O. The coordination reaction was promoted by the deprotonation of the ligand by the soft base triethylamine. The paper’s main contribution is the integration of the experimental and computational studies to explain the interesting magnetic behavior that the mixed valence manganese multimetallic core shows. The results presented herein, which are rarely found for Mn(II), (III) and (IV) complexes, will contribute to the understanding of the magnetic communication generated by the valence electrons and its repercussion in the local geometry and in the overall crystalline structure. View Full-Text
Keywords: intermolecular and intramolecular interactions; mixed valence; magnetic interactions; coordination geometry intermolecular and intramolecular interactions; mixed valence; magnetic interactions; coordination geometry
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Pastor-Ramírez, C.; Zamorano-Ulloa, R.; Ramírez-Rosales, D.; Vázquez-Lima, H.; Hernández-Anzaldo, S.; Reyes-Ortega, Y. Tetramer Compound of Manganese Ions with Mixed Valence [MnII MnIII MnIV] and Its Spatial, Electronic, Magnetic, and Theoretical Studies. Crystals 2018, 8, 447.

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