Journal ArticleDOI
Designer magnets containing cyanides and nitriles.
Joel S. Miller,Jamie L. Manson +1 more
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Three-dimensional network solids exhibiting magnetic ordering have been made from several first-row metal ions and bridging unsaturated cyanide, tricyanomethanide, and/or dicyanamide ligands, which possess several different structural motifs, and the shorter the bridge, the stronger the interaction.Abstract:
Magnets synthesized from molecules have contributed to the renaissance in the study of magnetic materials. Three-dimensional network solids exhibiting magnetic ordering have been made from several first-row metal ions and bridging unsaturated cyanide, tricyanomethanide, and/or dicyanamide ligands. These materials possess several different structural motifs, and the shorter the bridge, the stronger the interaction (i.e., C⋮N > N⋮CN ≫ N⋮CNC⋮N = N⋮CCC⋮N). Cyanide additionally has the ability to discriminate between C- and N-bonding to form ordered heterobimetallic magnets, and the strong coupling can lead to ferro- or ferrimagnetic ordering substantially above room temperature. Tricoordination of tricyanomethanide results in spin-frustrated systems, which possess interpenetrating rutile-like networks. In contrast, single rutile-like frameworks are formed by μ3-bonded dicyanamide, which leads to ferromagnetics and weak ferromagnetics.read more
Citations
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Ruthenium‐Catalyzed Direct Transformation of Alkenyl Oximes to 5‐Cyanated Isoxazolines: A Cascade Approach Based on Non‐Stabilized Radical Intermediate
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Amberlite IR-120H: An improved reusable solid phase catalyst for the synthesis of nitriles under solvent free microwave irradiation
TL;DR: In this paper, an efficient green protocol was developed for the conversion of a range of aldehydes to the corresponding nitriles using a solid-phase reusable catalyst combined with microwave irradiation.
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Metal-free three-component cyanoalkylation of quinoxalin-2(1H)-ones with vinylarenes and azobis(alkylcarbonitrile)s.
TL;DR: In this paper , a three-component radical cascade reaction of quinoxalin-2(1H)-ones with vinylarenes and azobis(alkyl carbonitrile)s is presented.
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Access to cyano-substituted pyrazolines through copper-catalyzed cascade cyanation/cyclization of unactivated olefins
Fei Meng,Qin Fang,Weidong Yuan,Ning Xu,Shujun Cao,Jianlin Chun,Jie Li,Honglin Zhang,Yingguang Zhu +8 more
TL;DR: In this paper, a copper-catalyzed domino cyanation/cyclization of hydrazone-tethered unactivated olefins has been developed, which provides a facile, practical, and rapid access to valuable pyrazolines with the important cyano functionality.
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A room-temperature organometallic magnet based on Prussian blue
TL;DR: In this paper, a room-temperature organometallic magnet was synthesized by combining a hexa-cyanometalate [M(CN)6]q− with a Lewis acid Lp+.
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Strongly Geometrically Frustrated Magnets
TL;DR: The study of cooperative phenomena in magnetism has provided fertile ground for testing theories of interacting systems that possess different spatial dimensions, ranges, and sign of interactions, and that exhibit local anisotropy of the basic interacting unit, the magnetic spin this paper.
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Sol−Gel Synthesis of KVII[CrIII(CN)6]·2H2O: A Crystalline Molecule-Based Magnet with a Magnetic Ordering Temperature above 100 °C
TL;DR: In this paper, the use of sol-gel methods was described to synthesize several crystalline molecule-based magnets with the Prussian blue structure, including KV II[CrIII (CN)6]‚2H2O, with an ordering temperature of 376 K (103°C).