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Chloranilato-Based Layered Ferrimagnets with Solvent-Dependent Ordering Temperatures

Instituto de Ciencia Molecular (ICMol), Departamento de Química Inorgánica, Universidad de Valencia, C/Catedrático José Beltrán 2, 46980 Paterna, Spain
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Magnetochemistry 2019, 5(2), 34; https://doi.org/10.3390/magnetochemistry5020034
Received: 2 May 2019 / Revised: 25 May 2019 / Accepted: 28 May 2019 / Published: 4 June 2019
We report the synthesis and the characterization of six new heterometallic chloranilato-based ferrimagnets formulated as (NBu4)[MnCr(C6O4Cl2)3]·nG with n = 1 for G = C6H5Cl (1), C6H5I (3), and C6H5CH3 (4); n = 1.5 for G = C6H5Br (2) and n = 2 for G = C6H5CN (5) and C6H5NO2 (6); (C6O4Cl2)2− = 1,3-dichloro,2,5-dihydroxy-1,4-benzoquinone dianion. The six compounds are isostructural and show hexagonal honeycomb layers of the type [MnCr(C6O4Cl2)3] alternating with layers containing the NBu4+ cations. The hexagons are formed by alternating Mn(II) and Cr(III) connected by bridging bis-bidentate chloranilato ligands. The benzene derivative solvent molecules are located in the hexagonal channels (formed by the eclipsed packing of the honeycomb layers) showing π-π interactions with the anilato rings. The six compounds behave as ferrimagnets with ordering temperatures in the range 9.8–11.2 K that can be finely tuned by the donor character of the benzene ring and by the number of solvent molecules inserted in the hexagonal channels. The larger the electron density on the aromatic ring and the larger the number of solvent molecules are, the higher Tc is. The only exception is provided by toluene, where the formation of H-bonds might be at the origin of weaker π-π interactions observed in this compound. View Full-Text
Keywords: two-dimensional (2D) ferrimagnets; chloranilato; heterometallic layers; honeycomb layers; molecule-based magnets two-dimensional (2D) ferrimagnets; chloranilato; heterometallic layers; honeycomb layers; molecule-based magnets
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MDPI and ACS Style

Martínez-Hernández, C.; Benmansour, S.; Gómez-García, C.J. Chloranilato-Based Layered Ferrimagnets with Solvent-Dependent Ordering Temperatures. Magnetochemistry 2019, 5, 34.

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