Structures and Magnetic Properties of Iron(III) Complexes with Long Alkyl Chains

Abstract

Iron(III) compounds with long alkyl chains, [Fe(Cn-pap) 2 ]ClO 4 (Cn-pap: alkoxy-2-(2-pyridylmethyleneamino)phenol, n = 8 (1), 10 (2), 12 (3), 14 (4), 16 (5)) have been synthesized. The compounds were characterized by single crystal X-ray structure analysis and temperature dependent magnetic susceptibility in order to research the relationship between magnetic properties and the presence of long alkyl chains in soft molecules of the present type. The compounds 1, 2, 3 and 4 are in the high-spin (HS) state over the temperature range of 5 to 400 K. On the other hand, compound 5 is low-spin (LS) showing that the difference in magnetic properties depends on the length of the alkyl chain in the respective compounds. OPEN ACCESSCrystals 2014, 4 105

Evaluation of Aquivion® as Recyclable Superacid Solid Catalyst in the Oxidation of Furfurylamines with Hydrogen Peroxide to 3‐Hydroxypyridines

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“…Generally, SCO properties of many alkylated Fe(II) complexes have also been reported [56][57][58][59][60][61][62][63][64][65][66][67][68][69][70][71], with fewer examples in Fe(III) [72], and these may show a variety of solution and solid state properties [67][68][69][70][71], including some with a wide thermal SCO hysteresis [67]. Clérac et al have recently reported an Fe(II) SCO complex decorated with long alkyl chains with a wide thermal hysteresis around room temperature (RT), demonstrating that a spin transition and the presence of a monotropic phase leads to magnetic tristability at RT [73].…”

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