Remarkable Scan Rate Dependence for a Highly Constrained Dinuclear Iron(II) Spin Crossover Complex with a Wide Thermal Hysteresis Loop

The abrupt [HS-HS] ↔ localized [HS-LS] spin crossovers of a new triazole-based diiron­(II) complex result in a record-equaling thermal hysteresis loop width for a dinuclear complex (Δ<i>T</i> = 22 K by SQUID magnetometer in “settle” mode) and show a remarkable scan rate dependence of only the cooling branch, as revealed by detailed magnetic, DSC, and Mössbauer studies