An unusual abrupt thermal spin-state transition in [FeL2][BF4]2 [L = 2,6-di(pyrazol-1-yl)pyridine]Electronic supplementary information (ESI) available: tabulated and plotted unit cell dimensions for 1 between 240–300 K; tabulated magnetic susceptibility data between 10–330 K. See http://www.rsc.org/suppdata/cc/b1/b100995h/
Abstract
The complex [Fe(L1H)2][BF4]2 exhibits an abrupt thermal spin-crossover which may be mediated by an order–disorder transition of the BF4− anions.