High-temperature spin crossover in the [Fe(L)2][Fe(L)(NCS)3](NCS)·2H2O complex, L = tris(pyrazol-1-yl)methane

A novel iron(II) coordination compound with tris(pyrazol-1-yl)methane (L) of the composition [FeL2][Fe(L)(NCS)3](NCS)·2H2O has been synthesized. Employing the XRD technique, its crystal structure has been determined. The compound was studied with the help of IR and UV–Vis spectroscopy and static magnetic susceptibility methods. A magnetochemical study of the complex within the temperature range 78–400 K has demonstrated that the compound exhibits a high-temperature spin crossover (SCO) 1А1 ⇔ 5Т2. The transition temperature amounts to 380 K.

Graphical abstractA novel iron(II) coordination compound with tris(pyrazol-1-yl)methane (L) of the composition [FeL2][Fe(L)(NCS)3](NCS)·2H2O has been synthesized. Employing the XRD technique, its crystal structure has been determined. The compound was studied with the help of IR and UV–Vis spectroscopy and static magnetic susceptibility methods. A magnetochemical study of the complex within the temperature range 78–400 K has demonstrated that the compound exhibits a high-temperature spin crossover (SCO) 1А1⇔5Т2. The transition temperature amounts to 380 K.Figure optionsDownload full-size imageDownload as PowerPoint slide