Work

Halide Anion Effects and Magnetostructural Relationships in Iron(III) Spin Crossover Complexes

Year: 2024

Type: article

Abstract: High Resolution Image Download MS PowerPoint Slide A series of three compounds [Fe(salEen-5-I) 2 ]Cl 1, [Fe(salEen-5-I) 2 ]Br 2, and [Fe(salEen-5-I) 2 ]I 3 in which salEen-5-I = 2-{[(2-(ethylamino)ethyl]imino)methyl}-4-iodophenolate is reported. Magnetic studies reveal that 2 exhibits an abrupt 2-step spin crossover close to room temperature around 288 K, while 1 and 3 exhibit gradual incomplete spin crossover spanning over 200 K. The use of structural parameters A–C to describe the nearest and next nearest neighbor contacts allows us to rationalize not only the abruptness of the spin crossover but also the stepped nature of the spin crossover in 2 . Comparisons with previously reported [Fe(salEen-5-Br) 2 ]ClO 4 and [Fe(salEen-5-I) 2 ]ClO 4 reveal that this magnetostructural relationship is applicable to a wider range of members of this family of complexes.

Source: Crystal Growth & Design

DOI: 10.1021/acs.cgd.4c01068

Authors: Theerapoom Boonprab, Warisa Thammasangwan, Guillaume Chastanet, Mathieu Gonidec, Phimphaka Harding, David J. Harding