Hysteretic spin crossover driven by anion conformational change

Abstract

A new air stable Fe^III spin crossover (SCO) complex has been synthesized. The compound undergoes abrupt SCO near room temperature with T_1/2 (↓) = 244 K and T_1/2 (↑) = 278 K. Structural studies of the complex in the high spin and low spin state show that the strong cooperativity and thus the wide hysteresis is driven by an unprecedented anionic conformational change.