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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Cu-catalyzed debrominative cyanation of gem-dibromoolefins: a facile access to α,β-unsaturated nitriles
TL;DR: An efficient catalytic route for the synthesis of α,β-unsaturated nitriles from easily accessible gem-dibromoolefins has been developed using inexpensive reagents such as Cu2O as a catalyst, L-proline as a ligand and NaCN as a cyanide source.
Journal ArticleDOI
Synthesis, Structure, Spectral and Magnetic Properties of 1D Zig‐zag Coordination Complex: {[Ni(cyclam)(μ‐1,5‐dca)]ClO4·[(CH3)2CO]}n
TL;DR: In this paper, a new nickel(II) complex, {Ni(cyclam)(μ-1,5-dca)]ClO4·[(CH3)2CO]}n (1), (cyclam = 1, 4, 8, 11-tetraazacyclotetradecane, dca = dicyanamide, N(CN)2−) has been synthesized and structurally characterized.
Journal ArticleDOI
Complexes of a hexa-nitrile dianion with neutral, chelating co-ligands: self-assembly, structure and magnetism.
TL;DR: Several new first-row transition-metal complexes have been synthesised by combining the polynitrile dianion HCTMCP(2-) with neutral, chelating co-ligands; 2,2'-bipyridine, 1,10-phenanthroline and 3-(2-pyridyl)pyrazole.
Journal ArticleDOI
Synthesis of Trinuclear Heterobimetallic Cyanido-Bridged Complexes from the Reaction of [MnI(CN)(CO)(tBuNC)4] with Transition-Metal Chlorides
TL;DR: In this paper, the mixed-valence trinuclear MnI-CN-NiII-NC-MnI derivative was characterized by X-ray structure analyses, which was shown to exhibit easily reducable central metal ions, intramolecular electron transfer from manganese(I) to copper(II) or iron(III), respectively.
Journal ArticleDOI
Structure, DFT Calculations, and Magnetic Characterization of Coordination Polymers of Bridged Dicyanamido-Metal(II) Complexes
Franz A. Mautner,Patricia V. Jantscher,Roland Fischer,Ana Torvisco,Ramon Vicente,Tolga N. V. Karsili,Salah S. Massoud +6 more
TL;DR: In this paper, three coordination polymers of metal-II-dicyanamido (dca) complexes with 4-methoxypyridine-Noxide (4-MOP-NO) were synthesized.
References
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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).