Crystal structure and magnetic properties of cyclohexylammonium trichlorocuprate(II): A quasi 1d Heisenberg ferromagnet

Groenendijk, H.A.; Blöte, Henk W. J.; Duyneveld́t, A.J. van; Gaura, R. M.; Landee, C. P.; Willett, Roger D.

doi:10.1016/0378-4363(81)90011-5

Cited by 31 publications

(30 citation statements)

References 15 publications

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“…The positions of C magn and χ maxima are not exactly at the same temperature (see Figure top). The reason may be that for an antiferromagnetic ordering, the critical temperature T c should be determined from magnetic data as the position of the d ( χT )/ dT maximum, which in some cases is shifted from the position of the χ ( T ) maximum , . To check this, d ( χT )/ dT was plotted together with C magn for comparison as a function of temperature (Figure bottom).…”

Section: Resultsmentioning

confidence: 99%

Synthesis, Crystal Structures, and Properties of Ni(NCS)₂‐4‐methoxypyridine Coordination Compounds

Jochim

Ceglarska

Rams

et al. 2018

Zeitschrift anorg allge chemie

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Two polymorphs of Ni(NCS)2(4‐methoxypyridine)4 (1‐I, 1‐II) as well as compounds with the compositions Ni(NCS)2(4‐methoxypyridine)4(MeCN)1.33 (1‐MeCN), Ni(NCS)2(4‐methoxypyridine)2(MeCN)2 (2) and [Ni(NCS)2(4‐methoxypyridine)2]n (3) are reported. For 1‐II no single crystals were obtained, but this compound is isotypic to the Fe analog 1‐II‐Fe. The crystal structures of 1 and 2 show discrete octahedral NiII complexes, whereas in 3 the cations are connected by pairs of thiocyanate anions into chains. Solvent mediated conversion experiments reveal that 1‐I is thermodynamically stable at room temperature and differential scanning calorimetry shows no indication for a polymorphic transition. The thermal behavior of 1‐I, 1‐II, and 2 was investigated by simultaneous thermogravimetry and differential scanning calorimetry, which shows that they decompose in two discrete steps. In the first step compound 3 is formed as an intermediate, which decomposes on further heating into Ni(NCS)2. Time dependent XRPD investigations prove, that 2 transforms already at room temperature into 3. Upon heating 1‐MeCN transforms into 1‐I in the first TG step, which decomposes on further heating into 3. Investigation of the magnetic behavior of 3 shows dominating ferromagnetic exchange interactions along the chains with J = 5.9(1) K. Susceptibility measurements indicate antiferromagnetic ordering, which was confirmed by specific heat measurements, revealing that magnetic ordering occurs at 1.91(5) K.

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Section: Resultsmentioning

confidence: 99%

Synthesis, Crystal Structures, and Properties of Ni(NCS)₂‐4‐methoxypyridine Coordination Compounds

Jochim

Ceglarska

Rams

et al. 2018

Zeitschrift anorg allge chemie

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“…At room temperature the structure is orthorhombic with a = 19.441 A, b = 8.549 A and c = 6.190 A [7]. The apical Cu-Cl (1) bond is longer than the equatorial Cu-Cl (2) or Cu-Cl (3) one.…”

Section: Introductionmentioning

confidence: 96%

“…With this type of Hamiltonian two extreme cases may be considered : (i) J~/J;) ii == 1 which leads to a Heisenberg system, (ii) Jl/J II = 0 which corresponds to an Ising system. In CHAC, I-LIJ ii = 0.99 [7], it shows a strong Heisenberg interaction and a very weak Ising one.…”

Section: Introductionmentioning

confidence: 99%

“…The cyclohexyl-ammonium-trichlorocuprate (II) (C6H1¡NH3)CuCI31 usually termed « CHAC » is a typical example of these materials [5,6]. The experimental data concerning the magnetic susceptibility [5,7] and the specific heat [6,8] indicate that it is very close to the theoretical onedimensional model, because of a strong interchain exchange and (Jo -50 K) and a weak interchain exchange (J' ~ 10-3 x Jo)' It shows a small anisotropic exchange so that the Hamiltonian of the symmetrical exchange can be expressed as :…”

Section: Introductionmentioning

confidence: 99%

“…The crystal was grown from an equimolar solution of ammonium cyclohexyl chloride and anhydrous copper chloride (II) in I-propanol. The crystallographic structure of CHAC has been determined by Groenendijk et al [7]. The CuCl3 -ions are disposed in chains parallel to the c-axis.…”

Section: Introductionmentioning

confidence: 99%

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High Surface Area of Polyhedral Chromia and Hexagonal Chromium Sulfide by the Thermolysis of Cyclohexylammonium Hexaisothiocyanatochromate(III) Sesquihydrate

et al. 2021

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A new organic-inorganic hybrid salt of cyclohexylammonium hexaisothiocyanatochromate(III) sesquihydrate, (C 6 H 11 NH 3 ) 3 [Cr-(NCS) 6 ] ⋅ 3/2H 2 O, was synthesized at room-temperature by metathesis and ligand addition for the establishment of energysaving chemical synthesis approach. The formation of this new salt was confirmed by FT-IR, UV-Vis spectrophotometry, elemental microanalysis, and single-crystal X-ray diffraction. The TGA study showed low-temperature thermal stability of this salt, where chromium oxide (Cr 2 O 3 ) formed under air and chromium sulfide (Cr 2 S 3 ) under argon, as PXRD confirmed their formation as nanocrystalline. The morphological studies by SEM and TEM revealed the formation of irregular polyhedron particles of Cr 2 O 3 and of hexagonal packed layers of Cr 2 S 3 . The textural study by nitrogen physisorption disclosed the mesoporous nature and high specific surface area of Cr 2 O 3 (∼ 132 m 2 g À 1 ) and Cr 2 S 3 (∼ 241 m 2 g À 1 ). Cyclohexylammonium could act as an organic self-template for the formation of mesopores and the high temperature of thermolysis assisted the formation of such pores.

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Crystal structure and magnetic properties of cyclohexylammonium trichlorocuprate(II): A quasi 1d Heisenberg ferromagnet

Cited by 31 publications

References 15 publications

Synthesis, Crystal Structures, and Properties of Ni(NCS)₂‐4‐methoxypyridine Coordination Compounds

Synthesis, Crystal Structures, and Properties of Ni(NCS)₂‐4‐methoxypyridine Coordination Compounds

ESR in a 1D-system with a ferromagnetic coupling

High Surface Area of Polyhedral Chromia and Hexagonal Chromium Sulfide by the Thermolysis of Cyclohexylammonium Hexaisothiocyanatochromate(III) Sesquihydrate

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Crystal structure and magnetic properties of cyclohexylammonium trichlorocuprate(II): A quasi 1d Heisenberg ferromagnet

Cited by 31 publications

References 15 publications

Synthesis, Crystal Structures, and Properties of Ni(NCS)2‐4‐methoxypyridine Coordination Compounds

Synthesis, Crystal Structures, and Properties of Ni(NCS)2‐4‐methoxypyridine Coordination Compounds

ESR in a 1D-system with a ferromagnetic coupling

High Surface Area of Polyhedral Chromia and Hexagonal Chromium Sulfide by the Thermolysis of Cyclohexylammonium Hexaisothiocyanatochromate(III) Sesquihydrate

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Synthesis, Crystal Structures, and Properties of Ni(NCS)₂‐4‐methoxypyridine Coordination Compounds

Synthesis, Crystal Structures, and Properties of Ni(NCS)₂‐4‐methoxypyridine Coordination Compounds