Abstract
The low-temperature magnetic susceptibility measurements have revealed that the [CH3NH3]2ReI6, [(CH3)2NH2]2ReI6, [(CH3)3NH]2ReI6 are antiferromagnets, with Néel temperatures TN at 5.5, 20.0 and 21.5K, respectively. The sample [(CH3)4N]2ReI6 shows paramagnetic behaviour in the temperature range of 1.7–300K. The IR spectra have shown a correlation between the change in band positions of the δ (I–Re–I) and ν (Re–I) vibrations, bulky effect of the cations and the influence of superexchange interaction on the magnetic susceptibility of the complexes.
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