Breakdown of the linear physical behavior in a solid solution of a halometallate molten salt, (dimim)[Fe(Cl1−xBrx)4] 0 ≤ x ≤ 1

((R)-(−)-3-Hydroxyquinuclidium)[FeCl4]; a plastic hybrid compound with chirality, ferroelectricity and long range magnetic ordering

“…S10, ESI †) with a Weiss constant, y p , close to À3.5 K and an effective paramagnetic moment m eff = 6.07(1) m B per Fe ion, which agrees with the expected one for high spin d 5 Fe(III) ions (m eff = 5.92 m B per Fe ion) and is in good agreement with those found in other hybrid halometallate compounds based on [FeCl 4 ] À ions. 34,[52][53][54] At RT, the w m T value of 4.54 emu K mol À1 Oe À1 is also consistent with the expected one (4.38 emu K mol À1 Oe À1 for Fe(III) ions with a magnetic spin S = 5/2). This value remains almost constant down to 30 K, where it begins to fall due to the evolution of antiferromagnetic interactions between Fe(III) ions.…”