Journal Article10.1039/B008314N
Synthesis, structure and magnetic properties of a new one-dimensional copper(II) complex with [Cr(CN)6]3−. Comparison with the [Fe(CN)6]3− analogue
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TL;DR: In this paper, a new complex of formula {[Cu(L)][Cu (L)Cr(CN)6]ClO4·2H2O}n1 (L is meso-5,5,7,12, 12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane) has been prepared from the reaction of [Cr[CN]3− and [Cu[L]2+, and its structure and magnetic properties studied.
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Abstract: A new complex of formula {[Cu(L)][Cu(L)Cr(CN)6]ClO4·2H2O}n1 (L is meso-5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane) has been prepared from the reaction of [Cr(CN)6]3− and [Cu(L)]2+, and its structure and magnetic properties studied. The structure consists of a discrete [Cu(L)]2+ cation and an anionic fragment formed by [Cu(L)Cr(CN)6]− in which the CuII is coordinated to four N atoms of the macrocycle and two CN groups of the hexacyanometalate in trans positions to give a one-dimensional compound. The compound shows a moderate ferromagnetic coupling. In order to describe its magnetic data a new formula was developed for the magnetic susceptibility of an isotropic ferromagnetic S = 1/2 and 3/2 Heisenberg chain assuming a variation of χMTvs. the length N. The best least-squares fit gives J = 4.82 cm−1, g = 2.02 and R = 1.23 × 10−4.
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Citations
Design of single chain magnets through cyanide-bearing six-coordinate complexes
Rodrigue Lescouëzec,Luminita Marilena Toma,Jacqueline Vaissermann,Michel Verdaguer,Fernando S. Delgado,Catalina Ruiz-Pérez,Francesc Lloret,Miguel Julve +7 more
TL;DR: In this paper, the design and preparation of stable cyanide-bearing six-coordinate complexes of formula [MIII(L)(CN)x](x+l−−m)− (M = trivalent transition metal ion and L = polydentate blocking ligand) are summarized and the appropriate choice of the end-cap ligand L whose denticity determines the number of coordinated cyanide groups in the mononuclear precursors.
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[Fe(bpb)(CN)2]- as a Versatile Building Block for the Design of Novel Low-Dimensional Heterobimetallic Systems: Synthesis, Crystal Structures, and Magnetic Properties of Cyano-Bridged FeIII−NiII Complexes [(bpb)2- = 1,2-Bis(pyridine-2-carboxamido)benzenate]
TL;DR: The present research shows that the dicyano-containing [Fe(bpb)(CN)2]- building block is a good candidate for the construction of low-dimensional magnetic materials.
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Synthesis and Structure of a Two-Dimensional Cyano-Bridged Coordination Polymer [Cu(cyclam)]2[Mo(CN)8]·10.5H2O (Cyclam = 1,4,8,11-Tetraazacyclodecane)
TL;DR: In this paper, a one-pot reaction between the [MoIV(CN)8]4-4- unit and the [Cu(cyclam)]2+ complex (cyclam = 1,4,8,11-tetraazacyclodecane) in aqueous solution yields the new cyano-bridged coordination polymer [Cu[Mo(CN]8]·10.5H2O], which presents an unusual two-dimensional framework with neutral zigzag sheet layers connected by hydrogen bonding.
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TL;DR: The high magnetic ordering temperatures of these cyano-bridged solids confirm that the incorporation of early transition elements into the lattice promotes stronger magnetic coupling by enhancing the backbonding into the cyanide π* orbitals.
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Exchange Coupling in the Alternating Chain Compounds Catena-Di-micron-chlorobis(4-Methylpyridine)Copper(II), Catena-Di-micron-bromobis-(N-Methylimidazole)Copper(II), Catena-hexanedionebis(Thiosemicarbazato)Copper(II), and Catena-octanedionebis(thiosemicarbazato)Copper(II).
TL;DR: In this article, the magnetic susceptibility of a Heisenberg alternating chain of S = 1/2 ions has been derived in terms of the alternation parameter, the exchange coupling constant, and the g factor.
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Crystal Structure, Electronic Structure, and Temperature-Dependent Raman Spectra of Tl[Ag(CN)2]: Evidence for Ligand-Unsupported Argentophilic Interactions
TL;DR: The data in this study suggest the significance of ligand-unsupported silver-silver interactions (argentophilicity) in Tl[Ag(CN)(2)].
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