Hysteretic spin crossover driven by anion conformational change†
Abstract
A new air stable FeIII spin crossover (SCO) complex has been synthesized. The compound undergoes abrupt SCO near room temperature with T1/2 (↓) = 244 K and T1/2 (↑) = 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.