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
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Rhodium(I)-catalyzed N-CN bond cleavage: intramolecular β-cyanation of styrenes.
Rui Wang,John R. Falck +1 more
TL;DR: The first example of intramolecular cyanation of a styrene by a rhodium(I)-catalyzed N-CN cleavage reaction is reported, demonstrating that alkene cyanation can indeed be atom economical.
Journal ArticleDOI
Copper-Catalyzed Synthesis of Nitriles by Aerobic Oxidative Reaction of Alcohols and Ammonium Formate
TL;DR: An efficient methodology for the synthesis of nitriles through an aerobic oxidative reaction of alcohols and ammonium formate with copper as a homogeneous catalyst under a normal air atmosphere and solvent-free conditions was developed in this paper.
Journal ArticleDOI
Iron-Catalyzed Dehydration of Aldoximes to Nitriles Requiring Neither Other Reagents Nor Nitrile Media.
TL;DR: It is described that a simple iron salt catalyzes the dehydration of aldoximes requiring neither other reagents nor nitrile media, and can be applied to the one-pot synthesis of nitiriles from aldehydes.
Journal ArticleDOI
Unusual Two-Dimensional Nickel(II) Complexes Based on [Ni(dien)]2+ and [M(CN)4]2− Building Blocks (M = Ni, Pd and Pt) − Synthesis, Structural Diversity and Magnetic Properties
Iñaki Muga,Juan M. Gutiérrez-Zorrilla,Pablo Vitoria,Pascual Román,Luis Lezama,Javier I. Beitia +5 more
TL;DR: In this article, three polymeric compounds [Ni(dien)Ni(CN)4]n(H2O)n (1) were synthesized by reaction of PF6 with NiII ions in aqueous solution.
Journal ArticleDOI
New coordination polymers with a 2,2-dicyano-1-ethoxyethenolate (dcne−) bridging ligand: syntheses, structural characterisation and magnetic properties of [M(dcne)2(H2O)2] (M = MnII, FeII, CoII, NiII and ZnII) and [Cu(dcne)2(H2O)]
TL;DR: In this article, the authors synthesize and characterise polymeric materials [M(dcne)2(H2O)2] with MnII (1), FeII (2), CoII (3), NiII (4), ZnII (5), and Zn2O equatorial plane.
References
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Selective binding and removal of guests in a microporous metal–organic framework
TL;DR: In this paper, a metal-organic framework was designed to bind aromatic guest molecules selectively, and the inclusions can be selectively readsorbed, even after the removal of included guest molecules, and they showed that the crystal lattice was thermally stable up to 350 °C.
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Design and construction of a new class of scaffolding-like materials comprising infinite polymeric frameworks of 3D-linked molecular rods. A reappraisal of the zinc cyanide and cadmium cyanide structures and the synthesis and structure of the diamond-related frameworks [N(CH3)4][CuIZnII(CN)4] and CuI[4,4',4'',4'''-tetracyanotetraphenylmethane]BF4.xC6H5NO2
B. F. Hoskins,Richard Robson +1 more
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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).