Abrupt two-step and symmetry breaking spin crossover in an iron(<scp>iii</scp>) complex: an exceptionally wide [LS–HS] plateau

Abstract

[Fe(qsal-Br)2]NO3·2MeOH is reported which undergoes abrupt two step symmetry breaking spin crossover, T½(1st step) = 136 K and T½(2nd step) = 232 K with a hysteresis of 16 K and 5 K, respectively, and an unprecedented [HS-LS] plateau of 96 K.